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Tuning Superconductivity by Isovalent Antimony Substitution in PrFeAs(O,F)

T0 review · 2 major / 5 minor · reviewed 2026-07-12 · grok-4.5

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Pith's one-line read Isovalent Sb at the As site in optimally F-doped PrFeAs(O,F) first tunes superconductivity gently, then disorder takes over and collapses it.

desk verdict Solid first systematic Sb-for-As map in optimally F-doped Pr-1111; multi-probe data support a real electronic-tuning-to-disorder crossover, with secondary phases as a known limit rather than a fatal flaw. read the letter →

arxiv 2607.03712 v1 pith:P763JA6J submitted 2026-07-04 cond-mat.supr-con cond-mat.mtrl-sciphysics.app-ph

Priya Singh , Konrad Kwatek , Tatiana Zajarniuk , Taras Palasyuk , Cezariusz Jastrzębski , Micha{l} Wierzbicki , Tomasz Cetner , Andrzej Szewczyk
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Shiv J. Singh
This is my paper · ORCID
classification cond-mat.supr-concond-mat.mtrl-sciphysics.app-ph
keywords iron-basedsuperconductors1111familyisovalentsubstitutionantimonydopinguppercriticalfieldvortexpinningcurrentdensityPrFeAs(OF)
verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

The paper maps how replacing arsenic with isovalent antimony in optimally fluorine-doped PrFeAsO0.7F0.3 changes superconductivity without adding or removing charge. At low Sb levels (x ≤ 0.3) the superconducting transition falls only from about 48 K to about 44 K, the lattice expands, pnictogen phonon modes soften, upper critical fields rise, and the energy barrier for vortex motion increases, so pinning improves while superconductivity stays relatively robust. Beyond that window, residual resistivity climbs, secondary phases proliferate, the transition broadens and collapses, and bulk superconductivity is lost. The work therefore shows a concrete crossover: moderate isovalent substitution can still tune the electronic and vortex landscape of a 1111 iron pnictide, but further substitution hands control to disorder and phase segregation. A reader who cares about how to engineer high-Tc iron pnictides without carrier doping can treat the x ≈ 0.3 boundary as an empirical limit for useful Sb incorporation.

What carries the argument

The compositional crossover near x ≈ 0.3, diagnosed by the simultaneous evolution of lattice parameter c, pnictogen A1g Raman mode, residual resistivity ρ0, RRR, Hc2 slope and vortex activation energy U0(H).

What would settle it

A single-crystal or carefully purified polycrystalline series in which EDX and Rietveld show negligible Fe–Sb or Pr–Sb–O secondary phases yet still exhibit the same rapid Tc collapse and ρ0 rise above x = 0.3 would confirm lattice-incorporated disorder as the cause; the opposite result would falsify the electronic-tuning-to-disorder narrative.

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Extended reading notes

Core claim

In optimally F-doped PrFeAs1-xSbxO0.7F0.3, isovalent Sb substitution produces a clear crossover: for x ≤ 0.3 superconductivity is only weakly suppressed (Tc from ~48 K to ~44 K) while lattice expansion, phonon softening, higher Hc2 and higher vortex activation energy appear; for 0.3 < x ≤ 0.6 disorder and secondary phases dominate and Tc falls rapidly.

Load-bearing premise

The measured trends up to x = 0.6 mainly reflect Sb that has entered the FeAs lattice rather than the growing network of secondary phases that already reaches roughly a quarter of the sample at higher doping.

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Editorial analysis

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Desk editor's note, referee report, and a circularity audit.

Referee Report

2 major / 5 minor

Summary. The manuscript reports a multi-probe study of isovalent Sb substitution on the As site in optimally F-doped polycrystalline PrFeAs1-xSbxO0.7F0.3 (x = 0–1.0). XRD/Rietveld and EDX show progressive c-axis and volume expansion with Sb incorporation up to x ≈ 0.6, after which secondary phases (Fe–Sb binaries, Pr–Sb–O) dominate. Raman spectra and DFT phonon calculations document systematic softening of the pnictogen A1g mode. Transport shows a gradual Tc drop from ~48 K to ~44 K for x ≤ 0.3, then rapid suppression to ~28 K at x = 0.6, accompanied by rising residual resistivity and falling RRR. Magnetotransport (to 9 T) yields enhanced dHc2/dT and WHH-estimated Hc2(0) (~350 T at x = 0.30) plus higher TAFF activation energies U0, while Bean-model Jc remains low (~10² A cm⁻²). The authors interpret the data as a crossover from electronically tuned superconductivity at moderate Sb content to a disorder- and secondary-phase-dominated regime at higher x.

Significance. Isovalent pnictogen substitution is comparatively under-explored in the 1111 family relative to Ba-122 and FeSe. The work supplies a coherent multi-technique data set (structure, Raman+DFT, zero-field and field-dependent transport, TAFF, magnetization, Jc) on a magnetically active rare-earth 1111 system and places the results against prior Sb-doped Sm-1111 and P-doped 1111 literature. The reported moderate-x enhancement of Hc2 and U0, together with the documented lattice-expansion/phonon-softening signatures, is a useful addition to the phenomenology of non-magnetic disorder in iron pnictides. The central claim is experimentally grounded and of interest to the IBS community, even though polycrystalline connectivity limits the absolute Jc values.

major comments (2)
  1. Structural Analysis and Supplementary Table ST1: at x = 0.6 the FeSb/FeSb2 fraction already reaches ~26%. The electronic-tuning vs disorder-crossover narrative for 0.3 < x ≤ 0.6 therefore rests on the assumption that lattice-incorporated Sb (not the secondary-phase network) still controls the measured Tc, ρ0, and U0 trends. The paper should quantify more explicitly how much of the rapid Tc collapse and residual-resistivity rise can be attributed to percolative disruption by secondary phases versus intrinsic pair-breaking from Sb on the FeAs lattice (e.g., by correlating phase fractions with ρ0 and ΔT across the full series, or by discussing grain-boundary vs intragrain contributions more quantitatively).
  2. Magnetotransport / WHH analysis (text around Fig. 4): Hc2(0) is obtained from the single-band WHH formula Hc2(0) = −0.693 Tc (dHc2/dT)|Tc, yielding ~350 T at x = 0.30. The manuscript itself notes multiband character and a large Maki parameter, so the absolute Hc2(0) values are upper-bound estimates. The claim of “enhanced upper critical fields (~200–350 T)” should be framed more carefully as an enhancement of the measured slope (and of the orbital-limiting scale) rather than as a robust zero-temperature Hc2, or a two-band estimate should be provided for at least one composition.
minor comments (5)
  1. Figure captions and text inconsistently write the stoichiometry as PrFeAs1-xSbxF0.7O0.3 or PrFeAs1-xSbxO0.7F0.3; standardize to one form throughout.
  2. Figure 2 caption refers to “PrFe1-xSxAsO0.7F0.3” (S instead of Sb); correct the typo.
  3. Several figure panels (e.g., Fig. 3, Fig. 7) would benefit from explicit error bars on Tc, ΔT, and ρ0 extracted from the fits.
  4. The DFT phonon comparison (inset of Fig. 2) is only for the end-member PrFeAsO vs hypothetical PrFeSbO; a brief statement of the computational settings (code, functional, k-mesh) would improve reproducibility.
  5. References to the authors’ own prior PrFeAs(O,F) and Mn-doped work are appropriate for baselines, but a short explicit comparison of absolute Jc and U0 values with those earlier samples would help the reader gauge the magnitude of the Sb effect.

Circularity Check

0 steps flagged · score 1.0 of 10

No significant circularity: measured Tc/Hc2/U0/ρ/phonon trends and standard WHH/TAFF/Bean analyses are independent of inputs; self-citations supply only parent baselines.

full rationale

This is a multi-probe experimental materials paper. Superconducting transition temperatures, lattice parameters, Raman mode frequencies, residual resistivities, RRR values, Hc2 slopes, irreversibility fields, vortex activation energies U0, and Jc are all extracted from new XRD, Raman, transport, magnetotransport, and magnetization data on the Sb-substituted series. The WHH estimate of Hc2(0), Ginzburg–Landau coherence length, Arrhenius TAFF extraction of U0, power-law fits to U0(H), and Bean-model Jc are textbook post-processing of those measured curves; none of the reported trends is forced by construction from a fitted parameter that is then re-labeled a prediction. Self-citations to the authors’ prior PrFeAs(O,F) and Mn-doped work ([28], [29]) furnish only the undoped baselines (Tc ≈ 48 K, parent slope dHc2/dT, parent U0) against which the new Sb series is compared; they do not define or constrain the Sb-dependent results. DFT phonon frequencies are an independent first-principles check of the observed softening, not a circular input. Secondary-phase fractions are quantified from Rietveld refinements of the same XRD data and are used interpretively, not as a definitional loop. Consequently the central crossover claim rests on independent multi-probe measurements rather than on any self-definitional, fitted-as-prediction, or load-bearing self-citation reduction. Score 1 reflects only the minor, non-load-bearing self-citations for baselines.

Assumptions & free parameters 4 free parameters · 5 assumptions · 0 invented entities

Load-bearing content is experimental. The central claim rests on standard condensed-matter analysis tools (Rietveld, Bean critical-state model, single-band WHH, TAFF Arrhenius form, Ginzburg–Landau coherence length) applied to polycrystalline multiphase samples, plus the domain premise that measured trends for x≤0.6 track lattice-incorporated Sb rather than secondary-phase percolation. No new particles or forces are postulated; free parameters are the usual fit quantities (lattice constants, phonon peak positions, dHc2/dT, U0, η exponents, ρ0).

free parameters (4)
  • dHc2/dT near Tc (and derived Hc2(0) via WHH) = −6.3 to −11.5 T/K; Hc2(0) ~212–350 T
    Slopes extracted from 90% ρn criterion under 0–9 T; Hc2(0) = −0.693 Tc (dHc2/dT) yields ~212–350 T. Values depend on criterion choice and single-band WHH assumption.
  • Vortex activation energy U0(H) and power-law exponents η = η1 ~0.30–0.49, η2 ~0.59–0.69
    Extracted from linear regions of Arrhenius plots of ρ(T,H); field dependence fit to U0 ~ H^−η with two regimes. Fitting windows and prefactor ρ0 are analysis choices.
  • Residual resistivity ρ0 = up to ~5–6 mΩ·cm at x=0.6
    Obtained by extrapolating normal-state ρ = ρ0 + A T^n to T=0; used as disorder metric and in modified RRR.
  • Rietveld lattice parameters and secondary-phase fractions = a=b=3.978(6) Å, c=8.607(2) Å for x=0; c increases with x
    Refined a,c,V and phase percentages (e.g. ~26% FeSb/FeSb2 at x=0.6) that underpin the structural-expansion and impurity narratives.
assumptions (5)
  • domain assumption Single-band Werthamer–Helfand–Hohenberg formula adequately estimates orbital Hc2(0) from the measured slope near Tc for trend comparison.
    Invoked in magnetotransport section despite acknowledged multiband character and large Maki parameter; used to claim Hc2 enhancement to ~350 T at x=0.30.
  • domain assumption Bean critical-state model converts magnetization-loop width Δm into global Jc for polycrystalline samples.
    Used in Magnetic Properties to report Jc ~10^2 A cm^−2 or lower for Sb-substituted samples versus ~10^3 for parent.
  • domain assumption Thermally activated flux flow resistivity follows ρ = ρn exp(−U0/kBT) with U0 reflecting vortex pinning strength.
    Standard TAFF analysis applied to Arrhenius plots for x=0, 0.15, 0.30 to claim enhanced pinning.
  • domain assumption Isovalent Sb substitution does not change carrier concentration; observed Tc and electronic changes arise from lattice expansion, pnictogen height, orbital overlap, and disorder scattering.
    Stated throughout Introduction and Discussion; underpins the electronic-tuning interpretation for x≤0.3.
  • domain assumption Raman modes near 162, 204, 211 cm^−1 correspond to Pr A1g, As A1g, and Fe B1g vibrations of the 1111 phase.
    Mode assignment from prior literature used to interpret phonon softening with Sb content.

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Pith. "Pith review of Tuning Superconductivity by Isovalent Antimony Substitution in PrFeAs(O,F)." pith.science (2026). https://pith.science/paper/P763JA6J

@misc{pith2026260703712,
  author       = {Pith},
  title        = {Pith review of: Tuning Superconductivity by Isovalent Antimony Substitution in PrFeAs(O,F)},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/P763JA6J}},
  note         = {Machine review of arXiv:2607.03712}
}
read the original abstract

We investigate the effects of isovalent Sb substitution at the As site in fluorine-doped PrFeAs1-xSbxO0.7F0.3 (x = 0 to 1.0) through structural, Raman spectroscopy, density functional theory (DFT), transport, magnetotransport, and magnetic measurements. The superconducting transition temperature decreases gradually from ~48 K for the parent compound to ~44 K up to x = 0.3, followed by a rapid suppression at higher Sb concentrations due to increasing disorder and secondary phase formation. Raman spectroscopy and DFT reveal lattice expansion and pronounced softening of pnictogen related vibrational modes upon Sb substitution. Magnetotransport measurements up to 9 T show enhanced upper critical fields and increased vortex activation energy for moderate Sb doping, indicating stronger vortex pinning. However, the critical current density remains low because of poor intergranular connectivity. The results demonstrate a crossover from an electronically tuned superconducting state to a disorder-dominated regime in isovalently substituted iron pnictides.

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Works this paper leans on

42 extracted references

  1. [1]

    Iron-based superconductors: Current status of materials and pairing mechanism,

    H. Hosono, and K. Kuroki, “Iron-based superconductors: Current status of materials and pairing mechanism,” Physica C, vol. 514, p. 399–422, 2015

    2015

  2. [2]

    High-temperature super conductivity in iron-based materials,

    J. Paglione, and R. Greene, “High-temperature super conductivity in iron-based materials,” Nat. Phys., vol. 6, p. 645–658, 2010

    2010

  3. [3]

    Iron-Based Layered Superconductor La[O 1-xFx]FeAs ( x = 0.05−0.12) with Tc = 26 K,

    Y . Kamihara, T. Watanabe, M. Hirano and H. Hosono, “Iron-Based Layered Superconductor La[O 1-xFx]FeAs ( x = 0.05−0.12) with Tc = 26 K,” J. Am. Chem. Soc., vol. 130, p. 3296, 2008

    2008

  4. [4]

    Two-band superconductivity in LaFeAsO 0.89 F0.11 at very high magnetic fields,

    F. Hunte, J. Jaroszynski, A. Gurevich, D. C. Larbalestier, R. Jin, A. S. Sefat, M. A. McGuire, B. C. Sales, D. K. Christen & D. Mandrus , “Two-band superconductivity in LaFeAsO 0.89 F0.11 at very high magnetic fields,” Nature, vol. 453, p. 903–905, 2008

    2008

  5. [5]

    Recent advances in iron-based superconductors toward applications,

    H. Hosono, A. Yamamoto, H. Hiramatsu, Y . Ma, “Recent advances in iron-based superconductors toward applications,” Mater. Today, vol. 21, pp. 278-302, 2018

    2018

  6. [6]

    Effects of Mn and Ni doping on the superconductivity of SmFeAs(O,F),

    S.J. Singh, J. Shimoyama, A. Yamamoto, H. Ogino, K. Kishio, “Effects of Mn and Ni doping on the superconductivity of SmFeAs(O,F),” Physica C, vol. 494, pp. 57-61, 2013

    2013

  7. [7]

    Study of Ni and Zn doped CeOFeAs: Effect on the structural transition and sp ecific heat capacity,

    S. J. Singh, J. Prakash, A. Pal, S. Patnaik, V .P.S. Awana, A.K. Ganguli, “Study of Ni and Zn doped CeOFeAs: Effect on the structural transition and sp ecific heat capacity,” Physica C: Superconductivity, vol. 490, pp. 49-54, 2013

    2013

  8. [8]

    Effects of phosphorous doping on the superconducting properties of SmFeAs(O,F),

    S. J. Singh, J.-I. Shimoyama, A. Yamamoto, H. Ogino, K. Kishio, “Effects of phosphorous doping on the superconducting properties of SmFeAs(O,F),” Physica C: Supercond. its Appl., vol. 504, pp. 19-23, 2014

    2014

Show all 42 references
  1. [9]

    Enhancement of superconductivity by Sb- doping in the hole-doped iron-pnictide superconduct or Pr 1− xSr xFeAsO,

    Q. Ji, G. Mu, T. Hu, W. Li, Y . Liu, Y . Ma, X. Xie, “Enhancement of superconductivity by Sb- doping in the hole-doped iron-pnictide superconduct or Pr 1− xSr xFeAsO,” Physica C, vol. 498, p. 50–53, 2014

    2014

  2. [10]

    Doping Dependence of Superconductivity and Lattice Constants in Hole Doped La 1-xSr xFeAsO,

    G. Mu, L. Fang, H. Yang, X. Zhu, P. Cheng, and H.- H. Wen, “Doping Dependence of Superconductivity and Lattice Constants in Hole Doped La 1-xSr xFeAsO,” J. Phys. Soc. Jpn., vol. 77, pp. 15-18, 2008

    2008

  3. [11]

    The effect of antimony doping on the transport and magnetic properties of Ce(O/F) FeAs,

    J. Prakash, S. J. Singh, G. Thakur, S. Patnaik and A. K. Ganguli, “The effect of antimony doping on the transport and magnetic properties of Ce(O/F) FeAs,” Supercond. Sci. Technol., vol. 24, p. 125008, 2011

    2011

  4. [12]

    Antimony Doping Effect on the Superconducti ng Properties of SmFeAs(O,F),

    M. Azam, M. Manasa, T. Zajarniuk, R. Didu szko, T. Cetner, A. Morawski, A. Wi śniewski, S. J. Singh, “Antimony Doping Effect on the Superconducti ng Properties of SmFeAs(O,F),” IEEE Trans. Appl. Supercond. , vol. 34, pp. 1-5, 2023. 30

    2023

  5. [13]

    Copper doping effects on the superconducting properties of Sm-bas ed oxypnictides,

    M. Azam, M. Manasa, T. Zajarniuk, T. Palasyuk, R. Diduszko, T. Cetner, et al., “Copper doping effects on the superconducting properties of Sm-bas ed oxypnictides,” J. Am. Ceram. Soc. , vol. 107, p. 6806–6820, 2024

    2024

  6. [14]

    Antiferromagnetic ordering in the absence of structural distortion in Ba(Fe 1− xMn x)2As 2,

    M. G. Kim, A. Kreyssig, A. Thaler, D. K. Pratt, W. Tian, J. L. Zarestky, M. A. Green, S. L. Bu d’ko, P. C. Canfield, R. J. McQueeney, and A. I. Goldman, “Antiferromagnetic ordering in the absence of structural distortion in Ba(Fe 1− xMn x)2As 2,” Phys. Rev. B, vol. 82, p. 2205...

    2010

  7. [15]

    Poisoning effect of Mn in LaFe 1− .Mn .AsO 0.89 F0.11 : Unveiling a quantum critical point in the phase diagram of iron-based superconductors,

    F. Hammerath, P. Bonfà, S. Sanna, G. Prando, R. De Renzi, Y . Kobayashi, M. Sato, and P. Carretta, “Poisoning effect of Mn in LaFe 1− .Mn .AsO 0.89 F0.11 : Unveiling a quantum critical point in the phase diagram of iron-based superconductors,” Phys. Rev. B, vol. 89, p. 134503, 2014

    2014

  8. [16]

    Gap symmetry and structure of Fe- based superconductors,

    P. J. Hirschfeld, M. M. Korshunov and I. I. Mazin, “Gap symmetry and structure of Fe- based superconductors,” Rep. Prog. , vol. 74, p. 124508, 2011

    2011

  9. [17]

    Near-degeneracy of several pairing channels in multiorbital models for the Fe pnictides,

    S. Graser, T. A. Maier, P . J. Hirschfeld and D. J. Scalapino, “Near-degeneracy of several pairing channels in multiorbital models for the Fe pnictides,” New J. Phys., vol. 11, p. 025016, 2009

    2009

  10. [18]

    Observation of Fermi-surface–dependent nodeless superconducting gaps in Ba 0.6 K0.4 Fe 2As 2,

    H. Ding, P. Richard, K. Nakayama, K. Sugawara, T. Araka ne, Y . Sekiba, A. Takayama, S. Souma, T. Sato, T. Takahashi, “Observation of Fermi-surface–dependent nodeless superconducting gaps in Ba 0.6 K0.4 Fe 2As 2,” EPL, vol. 83 , p. 47001, 2008

    2008

  11. [19]

    Evolution from non-Fermi- to Fermi-liquid transport via isovalent doping in BaFe 2(As 1− .P.)2 superconductors,

    S. Kasahara, T. Shibauchi, K. Hashimoto, K. Ikada, S. Tonegawa, R . Okazaki, H. Shishido, H. Ikeda, H. Takeya et al., “Evolution from non-Fermi- to Fermi-liquid transport via isovalent doping in BaFe 2(As 1− .P.)2 superconductors,” Phys. Rev. B , vol. 81, p. 184519, 2010

    2010

  12. [20]

    A Quantum Critical Point Lying Beneath the Superconducting Dome in Iron Pnictides,

    T. Shibauchi, A. Carrington and Y . Matsuda , “A Quantum Critical Point Lying Beneath the Superconducting Dome in Iron Pnictides,” Annu. Rev. Condens. Matter Phys., vol. 5, pp. 113- 135, 2014

    2014

  13. [21]

    A Sharp Peak of the Zero- Temperature Penetration Depth at Optimal Composition in BaFe 2(As 1–xPx)2,

    K. Hashimoto, K. Cho, T. Shibauchi, S. Kasahara, Y . Mizukami, R. Katsumata, Y . Tsuruhara, T. Terashi ma, H. Ikeda, M. A. Tanatar, H. Kitano, N. Salovich , R. W. Giannetta, P. Walmsley, A. Carrington, R. Prozorov, and Y . Matsuda , “A Sharp Peak of the Zero- Temperature Penet...

    2012

  14. [22]

    Emergence of the nematic electronic state in FeSe,

    M. D. Watson, T. K. Kim, A. A. Haghighirad, N. R. D avies, A. McCollam, A. Narayanan, S. F. Blake, Y . L. Chen, S. Ghannadzadeh et al., “Emergence of the nematic electronic state in FeSe,” Phys. Rev. B , vol. 91, p. 155106, 2015

    2015

  15. [23]

    Tellurium substitution effect on superconductivity of the α-phase iron selenide,

    Kuo-Wei Yeh et al., “Tellurium substitution effect on superconductivity of the α-phase iron selenide,” EPL, vol. 84, p. 37002, 2008

    2008

  16. [24]

    Nematicity, magnetism and superconductivity in FeSe,

    A. E. Böhmer and A. Kreisel, “Nematicity, magnetism and superconductivity in FeSe,” J. Phys.: Condens. Matter, vol. 30, p. 023001, 2018

    2018

  17. [25]

    Enhancement of superconducting transition temperat ure due to antiferromagnetic spin fluctuations in iron pnictides LaFe(As 1− .P.)(O 1− :F:): 31P-NMR studies,

    H. Mukuda, F. Engetsu, K. Yamamoto, K. T. Lai, M. Y ashima, Y . Kitaoka, A. Takemori, S. Miyasaka, and S. Tajima, “Enhancement of superconducting transition temperat ure due to antiferromagnetic spin fluctuations in iron pnictides LaFe(As 1− .P.)(O 1− :F:): 31P-NMR studies,” P...

    2014

  18. [26]

    Phase diagram and gap anisotropy in iron- pnictide superconductors,

    H. Ikeda, R. Arita and J. Kuneš, “Phase diagram and gap anisotropy in iron- pnictide superconductors,” Phys. Rev. B, vol. 81, p. 054502 , 2010

    2010

  19. [27]

    Kinetic frustra tion and the nature of the magnetic and paramagnetic states in iron pnictides and iron chal cogenides,

    Z. P. Yin, K. Haule & G. Kotliar , “Kinetic frustra tion and the nature of the magnetic and paramagnetic states in iron pnictides and iron chal cogenides,” Nat. Mater., vol. 10, p. 932–935, 2011

    2011

  20. [28]

    Electronic phase diagram and enhanced superconduct ivity in fluorine-doped PrFeAsO 1-xFₓ,

    P.Singh, K. Kwatek, T. Zajarniuk, T. Palasyuk, C. J astrz ębski, A. Szewczyk, S. J. Singh, “Electronic phase diagram and enhanced superconduct ivity in fluorine-doped PrFeAsO 1-xFₓ,” Journal of Alloys and Compounds, vol. 1072, p. 188942 , 2026

    2026

  21. [29]

    Effect of Mn substitution on superconductiv ity in PrFeAs(O,F ): Role of magnetic impurities,

    P. Singh, K. Kwatek, T. Zajarniuk, T. Palasyuk, C. Jastrz ębski, A. Szewczyk, M. Wierzbicki, S. J. Singh, “Effect of Mn substitution on superconductiv ity in PrFeAs(O,F ): Role of magnetic impurities,” Journal of Physics and Chemistry of Solids, vol. 218, p. 113933, 2026

    2026

  22. [30]

    Raman spectroscopy of RFeAsO (R = Sm, La),

    V . G. Hadjiev, M. N. Iliev, K. Sasmal, Y .-Y . Sun and C. W. Chu, “Raman spectroscopy of RFeAsO (R = Sm, La),” Physical Review B, vol. 77, p. 220505R, 2008

    2008

  23. [31]

    The optical phonon spectrum of SmFeAsO,

    C. Marini, C. Mirri, G. Profeta, S. Lupi, D. Di Cas tro, R. Sopracase et al., “The optical phonon spectrum of SmFeAsO,” Europhysical Letters, vol. 84, p. 67013, 2008

    2008

  24. [32]

    Spin-dependent electron-phonon interaction in SmFeAsO by low-temperature Raman Spe ctroscopy,

    L. Zhang, F. Guan, D. L. Feng, X. Chen, X. S. S. and M. Chen, “Spin-dependent electron-phonon interaction in SmFeAsO by low-temperature Raman Spe ctroscopy,” Journal of American Chemical Society, vol. 132, pp. 15223-27, 2010

    2010

  25. [33]

    Origin of the non- monotonic variance of Tc in the 1111 iron based superconductors with isovalent doping,

    H. Usui, K. Suzuki & K. Kuroki, “Origin of the non- monotonic variance of Tc in the 1111 iron based superconductors with isovalent doping,” Sci. Rep., vol. 5, p. 11399 , 2015

    2015

  26. [34]

    Superconductivity in iron compounds,

    G. R. Stewart, “Superconductivity in iron compounds,” Rev. Mod. Phys., vol. 83, p. 1589, 2011

    2011

  27. [35]

    Temperature and Purity Dependence of the Superconducting Critical Field, ; 2. III. Electron Spin and Spin-Orbit Effects,

    N. R. Werthamer, E. Helfand, and P. C. Hohenb erg, “Temperature and Purity Dependence of the Superconducting Critical Field, ; 2. III. Electron Spin and Spin-Orbit Effects,” Phys. Rev. , vol. 147, p. 295, 1966

    1966

  28. [36]

    Tinkham, Introduction to Superconductivity, 2nd edition, McGraw-Hill, 1966

    M. Tinkham, Introduction to Superconductivity, 2nd edition, McGraw-Hill, 1966

    1966

  29. [37]

    Effect of Pauli Paramagnetism on Magnetic Properties of High- Field Superconductors,

    K. Maki, “Effect of Pauli Paramagnetism on Magnetic Properties of High- Field Superconductors,” Phys. Rev. , vol. 148, p. 362, 1966

    1966

  30. [38]

    V ortices in high-temperature superconductors,

    G. Blatter, M. V . Feigel'man, V . B. Geshkenbein, A. I. Larkin, and V . M. Vinokur, “V ortices in high-temperature superconductors,” Rev. Mod. Phys., vol. 66, p. 1125, 1994

    1994

  31. [39]

    Mag netic relaxation in high-t emperature superconductors,

    Y . Yeshurun, A. P. Malozemoff, and A. Shaulov, “Mag netic relaxation in high-t emperature superconductors,” Rev. Mod. Phys., vol. 68, p. 911, 1996

    1996

  32. [40]

    Bulk and single crys tal growth progress of iron- based superconductors (FBS): 1111 and 1144,

    S. J. Singh and M. I. Sturza, “Bulk and single crys tal growth progress of iron- based superconductors (FBS): 1111 and 1144,” Crystals, vol. 12, p. 20, 2020. 32

    2020

  33. [41]

    P nictogen height as a possible switch between high- ; nodeless and low- ; nodal pairings in the iron-based superconductors,

    K. Kuroki, H. Usui, S. Onari, R. Arita and H. Aoki, “P nictogen height as a possible switch between high- ; nodeless and low- ; nodal pairings in the iron-based superconductors,” Phys. Rev. B , vol. 79, p. 224511 , 2009

    2009

  34. [42]

    Hall Effect and Res istivity Study of the Magnetic Transition, Carrier Content, and Fermi-Liquid Behavior in Ba(Fe 1− .Co .)2As 2,

    F. Rullier-Albenque, D. Col son, A. Forget, and H. Alloul, “Hall Effect and Res istivity Study of the Magnetic Transition, Carrier Content, and Fermi-Liquid Behavior in Ba(Fe 1− .Co .)2As 2,” Phys. Rev. Lett. , vol. 057001, p. 103, 2009

    2009

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Reviewed July 12, 2026 · model on record in the stance chip above.