Observation of Temperature Independent Anomalous Hall Effect in Thin Bismuth from Near Absolute Zero to 300 K Temperature
Pith reviewed 2026-05-23 23:43 UTC · model grok-4.3
The pith
Pure bismuth thin films display a temperature-independent anomalous Hall effect from 15 mK to 300 K.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
A temperature-independent anomalous Hall effect is observed in thin pure bismuth from near absolute zero to 300 K, analyzed as intrinsic and attributed to surface Berry curvature.
What carries the argument
Surface Berry curvature in bismuth that breaks inversion symmetry and generates intrinsic anomalous Hall conductivity.
If this is right
- The anomalous Hall effect remains constant while longitudinal resistance follows semi-metallic temperature dependence.
- No magnetoresistance appears for fields up to 30 T.
- Reconstructed conductivities indicate the anomalous Hall effect is intrinsic.
- Surface Berry curvature is proposed as the symmetry-breaking mechanism.
Where Pith is reading between the lines
- Similar temperature-independent effects could be sought in other diamagnetic semi-metals with surface states.
- Thickness-dependent measurements would help confirm whether the effect is confined to the surface.
- Stable Hall response across wide temperature range might enable new device concepts if the mechanism holds.
Load-bearing premise
The bismuth sample contains no undetected magnetic contaminants and the conductivity values are accurately reconstructed from resistance measurements.
What would settle it
Detection of magnetic impurities via direct measurement or observation of clear temperature dependence in the anomalous Hall conductivity would contradict the central claim.
Figures
read the original abstract
We report our discovery of a temperature independent anomalous Hall effect (AHE) from 15 mK to 300 K temperature occurring in a 68 nm thick transport device made out of pure bismuth. This surprising behaviour is accompanied with an expected temperature dependent longitudinal resistance consistent with semi-metallic bismuth, however it surprisingly showed no hint of a magnetoresistance for magnetic fields between $\pm30$ T. Even though bismuth is a diamagnetic material which {\it a priori} does not break time-reversal symmetry (TRS), our analysis of the reconstructed conductivities points towards the AHE to be of the intrinsic type, which does not emanate from magnetic impurities. Finally, as pure bismuth has been shown numerically to host a Berry curvature at its surface which breaks inversion symmetry, we propose it as a possible explanation for the temperature independent AHE observed here.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The manuscript reports the observation of a temperature-independent anomalous Hall effect (AHE) in a 68 nm thick transport device fabricated from pure bismuth, spanning 15 mK to 300 K. Longitudinal resistance follows the expected semimetallic temperature dependence, yet no magnetoresistance appears for fields up to ±30 T. Conductivity reconstruction from the measured resistivities is used to argue that the AHE is intrinsic rather than impurity-driven, with surface Berry curvature (from prior numerical work) proposed as the origin despite the diamagnetic character of bulk bismuth.
Significance. If substantiated, the result would be significant: a temperature-independent intrinsic AHE over four orders of magnitude in temperature in a non-magnetic semimetal would challenge standard pictures of Hall transport and highlight possible surface-state contributions in bismuth. The wide temperature range and reported absence of MR constitute notable experimental features that, if robust, merit attention in mesoscopic and topological transport studies.
major comments (3)
- [Abstract / conductivity reconstruction section] Abstract and § on conductivity analysis: the claim that reconstructed conductivities demonstrate an intrinsic AHE (not due to magnetic impurities) is load-bearing, yet the manuscript provides no explicit description of the inversion procedure (e.g., whether a full tensor inversion accounting for possible anisotropy or contact geometry was used) nor any supporting checks such as consistency with Onsager relations or error propagation from the high ρ_xx values typical of bismuth.
- [Sample preparation / results] Sample characterization and § on device fabrication: exclusion of magnetic contaminants at levels sufficient to produce a spontaneous Hall signal requires direct evidence (e.g., magnetization measurements, impurity spectroscopy, or control samples), which is not reported; without this the intrinsic interpretation cannot be distinguished from extrinsic contributions.
- [Magnetotransport results] Magnetotransport data (§ on MR measurements): the complete absence of magnetoresistance up to 30 T is atypical for high-mobility bismuth films and directly affects the reliability of Hall resistivity extraction; the manuscript must demonstrate that this null result does not arise from current-jetting, inhomogeneous current distribution, or measurement geometry that could artifactually produce an apparent AHE.
minor comments (2)
- Notation for the anomalous Hall conductivity should be defined explicitly when first introduced and used consistently throughout.
- Figure captions for Hall and longitudinal data should include raw resistivity values, error bars, and the precise definition of the extracted AHE component.
Simulated Author's Rebuttal
We thank the referee for their careful reading of the manuscript and for raising these important points. We address each major comment below and indicate where revisions will be made.
read point-by-point responses
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Referee: [Abstract / conductivity reconstruction section] Abstract and § on conductivity analysis: the claim that reconstructed conductivities demonstrate an intrinsic AHE (not due to magnetic impurities) is load-bearing, yet the manuscript provides no explicit description of the inversion procedure (e.g., whether a full tensor inversion accounting for possible anisotropy or contact geometry was used) nor any supporting checks such as consistency with Onsager relations or error propagation from the high ρ_xx values typical of bismuth.
Authors: We agree that the conductivity reconstruction procedure requires a more explicit description to support the intrinsic AHE claim. In the revised manuscript we will add a dedicated paragraph detailing the inversion method, including confirmation that a full tensor inversion was performed while accounting for the rectangular sample geometry and assuming in-plane isotropy. We will also incorporate explicit checks for Onsager reciprocity (ρ_xy(B) = −ρ_xy(−B)) and a brief error-propagation analysis based on the measured ρ_xx uncertainties. revision: yes
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Referee: [Sample preparation / results] Sample characterization and § on device fabrication: exclusion of magnetic contaminants at levels sufficient to produce a spontaneous Hall signal requires direct evidence (e.g., magnetization measurements, impurity spectroscopy, or control samples), which is not reported; without this the intrinsic interpretation cannot be distinguished from extrinsic contributions.
Authors: The source material was 99.999 % pure bismuth and the AHE remains strictly temperature-independent from 15 mK to 300 K, a dependence that is atypical for dilute magnetic-impurity mechanisms. Nevertheless, we acknowledge that direct magnetization or impurity-spectroscopy data on the actual devices would provide stronger exclusion. No such measurements were performed on these thin-film devices. We will therefore revise the text to state this limitation explicitly and to emphasize that the temperature independence and conductivity analysis constitute the primary evidence against an extrinsic origin. revision: partial
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Referee: [Magnetotransport results] Magnetotransport data (§ on MR measurements): the complete absence of magnetoresistance up to 30 T is atypical for high-mobility bismuth films and directly affects the reliability of Hall resistivity extraction; the manuscript must demonstrate that this null result does not arise from current-jetting, inhomogeneous current distribution, or measurement geometry that could artifactually produce an apparent AHE.
Authors: We agree that the reported absence of MR up to 30 T is surprising for bismuth and must be shown to be free of geometric artifacts. In the revised version we will add a short subsection discussing the Hall-bar geometry, contact placement, and current uniformity. We will include a qualitative argument that current-jetting is suppressed by the thin-film aspect ratio and the absence of strong longitudinal MR itself, together with a note that the extracted Hall resistivity satisfies Onsager symmetry across the full field range. revision: yes
- Direct magnetization or impurity-spectroscopy measurements on the fabricated devices to exclude magnetic contaminants at the sensitivity needed to rule out an extrinsic AHE.
Circularity Check
No circularity: experimental observation supported by external numerical literature
full rationale
The paper reports direct experimental measurements of a temperature-independent Hall signal in a bismuth thin film, reconstructs conductivities via standard tensor inversion, and interprets the result as intrinsic AHE by citing prior independent numerical calculations of surface Berry curvature. No parameters are fitted to the target quantity and then relabeled as predictions, no self-citations form the load-bearing justification, and the central claim remains an empirical observation rather than a closed deductive loop. The derivation chain is therefore self-contained against external benchmarks.
Axiom & Free-Parameter Ledger
axioms (1)
- domain assumption Pure bismuth is diamagnetic and does not break time-reversal symmetry a priori.
Reference graph
Works this paper leans on
-
[1]
O. Prakash, A. Kumar, A. Thamizhavel, and S. Ramakr- ishnan, Evidence for bulk superconductivity in pure bis- muth single crystals at ambient pressure, Science 355, 52(2017)
work page 2017
-
[2]
L. Aggarwal, P. Zhu, T. L. Hughes, and V. Mad- havan, Evidence for higher order topology in Bi and Bi0.92Sb0.08, Nat. Commun. 12, 4420 (2021)
work page 2021
-
[3]
F. Schindler, Z. Wang, M. G. Vergniory, A. M. Cook, A. Murani, S. Sengupta, A. Y. Kasumov, R. Deblock, S. Jeon, I. Drozdov, H. Bouchiat, S. Gu´ eron, A. Yazdani, B. A. Bernevig, and T. Neupert, Higher-order topology in bismuth, Nat. Phys. 14, 918 (2018)
work page 2018
-
[4]
P. Makushko, S. Kovalev, Y. Zabila, I. Ilyakov, A. Pono- maryov, A. Arshad, G. L. Prajapati, T. V. A. G. de Oliveira, J.-C. Deinert, P. Chekhonin, I. Veremchuk, T. Kosub, Y. Skourski, F. Ganss, D. Makarov, and C. Ortix, A tunable room-temperature nonlinear Hall effect in ele- mental bismuth thin films, Nat. Electron. 7, 207 (2024)
work page 2024
-
[5]
F. D. M. Haldane, Model for a Quantum Hall Effect with- out Landau Levels: Condensed-Matter Realization of the “Parity Anomaly”, Phys. Rev. Lett. 61, 2015 (1988)
work page 2015
-
[6]
S.-Y. Yang, K. Chang, and S. S. P. Parkin, Large planar Hall effect in bismuth thin films, Phys. Rev. Research 2, 022029(R) (2020)
work page 2020
-
[7]
D. Abdelbarey, J. Koch, Z. Mamiyev, C. Tegenkamp, and H. Pfn¨ ur, Thickness-dependent electronic transport through epitaxial nontrivial Bi quantum films, Phys. Rev. B 102, 115409 (2020)
work page 2020
-
[8]
D. Abdelbarey, J. Koch, P Kr¨ oger, P. Yogi, C. Tegenkamp, and H. Pfn¨ ur, Magnetoconductance in epitaxial bismuth quantum films: Beyond weak (anti)localization, Phys. Rev. B 104, 075431 (2021)
work page 2021
-
[9]
L. Chen, A. X. Wu, N. Tulu, J. Wang, A. Juanson, K. Watanabe, T. Taniguchi, M. T. Pettes, M. A. Campbell, M. Xu, C. A. Gadre, Y. Zhou, H. Chen, P. Cao, L. A. Jau- regui, R. Wu, X. Pan, and J. D. Sanchez-Yamagishi, Ex- ceptional electronic transport and quantum oscillations in thin bismuth crystals grown inside van der Waals ma- terials, Nat. Mater. 23, 741 (2024)
work page 2024
-
[10]
O. Yu, R. Allgayer, S. Godin, J. Lalande, P. Fossati, C. Hsu, T. Szkopek, and G. Gervais, Method of mechanical exfoliation of bismuth with micro-trench structures, J. Appl. Phys. 134, 244302 (2023)
work page 2023
-
[11]
O. Yu, S. Vijayakrishnan, R. Allgayer, T. Szkopek, and G. Gervais, Anomalous Hall effect in thin bismuth, Phys. Rev. B 109, L121406 (2024)
work page 2024
-
[12]
Y. Tian, L. Ye, and X. Jin, Proper Scaling of the Anoma- lous Hall Effect, Phys. Rev. Lett. 103, 087206 (2009)
work page 2009
-
[13]
Culcer, in Encyclopedia of Condensed Matter Physics (Second Edition), edited by T
D. Culcer, in Encyclopedia of Condensed Matter Physics (Second Edition), edited by T. Chakraborty (Academic Press, 2024), Vol. 1, p. 587
work page 2024
- [15]
-
[16]
A. Shitade, and N. Nagaosa, Anomalous Hall Effect in Ferromagnetic Metals: Role of Phonons at Finite Tem- perature, J. Phys. Soc. Jpn 81, 083704 (2012)
work page 2012
-
[17]
T. Miyasato, N. Abe, T. Fujii, A. Asamitsu, S. Onoda, Y. Onose, N. Nagaosa, and Y. Tokura, Crossover Behav- ior of the Anomalous Hall Effect and Anomalous Nernst Effect in Itinerant Ferromagnets, Phys. Rev. Lett. 99, 086602 (2007)
work page 2007
-
[18]
H. Weng, R. Yu, X. Hu, X. Dai, and Z. Fang, Quantum anomalous Hall effect and related topological electronic states, Adv. Phys 64, 227(2015)
work page 2015
- [19]
-
[20]
C.-Z. Chang, C.-X. Liu, and A. H. MacDonald, Col- loquium : Quantum anomalous Hall effect, Rev. Mod. Phys. 95, 011002 (2023)
work page 2023
-
[21]
H. H. Sample, W. J. Bruno, S. B. Sample, and E. K. Sichel, Reverse-field reciprocity for conducting specimens in magnetic fields, J. Appl. Phys. 61, 1079 (1987)
work page 1987
-
[22]
B. Donovan, and G. K. T. Conn, LXIX. The electri- cal conductivity of bismuth fibres: II. Anomalies in the magneto-resistance, The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science 41, 770 (1950)
work page 1950
-
[23]
G. K. T. Conn, and B. Donovan, Anomalous Magneto- Resistance Effects in Bismuth, Nature 162, 336 (1948)
work page 1948
-
[24]
B. C. Camargo, P. Gier lowski, A. Alaferdov, I. N. Dem- chenko, M. Sawicki, K. Gas, and Y. Kopelevich, Anoma- lous Hall effect in bismuth, J. Magn. Magn. Mater. 525, 167581 (2021)
work page 2021
- [25]
-
[26]
D. L. Partin, J. Heremans, D. T. Morelli, C. M. Thrush, C. H. Olk, and T. A. Perry, Growth and characterization of epitaxial bismuth films, Phys. Rev. B 38, 3818-3824 (1988). 6
work page 1988
-
[27]
M. Cabrera-Baez, K. V. R. A. Silva, P. R. T. Ribeiro, D. R. Ratkovski, E. L. T. Fran¸ ca, A. Flessa-Savvidou, B. Casas, T. Siegrist, L. Balicas, S. M. Rezende, and F. L. A. Machado, Giant magnetoresistance in the crystalline Y Cd 6 intermetallic compound, Phys. Rev. B107, 144414 (2023)
work page 2023
-
[28]
J. Juraszek, L. Bochenek, A. Rudenko, M. M. Hosen, M. Daszkiewicz, Z. Wang, J. Wosnitza, Z. Henkie, M. Samsel-Czeka la, M. Neupane, and T. Cichorek, Non- saturating extreme magnetoresistance and large elec- tronic magnetostriction in LuAs, Phys. Rev. Research 1, 032016(R) (2019)
work page 2019
-
[29]
I. A. Leahy, Y.-P. Lin, P. E. Siegfried, A. C. Treglia, J. C. W. Song, R. M. Nandkishore, and M. Lee, Nonsaturating large magnetoresistance in semimetals, Proc. Natl. Acad. Sci. 115, 10570 (2018)
work page 2018
- [30]
-
[31]
M. N. Ali, J. Xiong, S. Flynn, J. Tao, Q. D. Gib- son, L. M. Schoop, T. Liang, N. Haldolaarachchige, M. Hirschberger, N. P. Ong, and R. J. Cava, Large, non- saturating magnetoresistance in WTe2, Nature 514, 205 (2014)
work page 2014
-
[32]
C. Shekhar, A. K. Nayak, Y. Sun, M. Schmidt, M. Nick- las, I. Leermakers, U. Zeitler, Y. Skourski, J. Wosnitza, Z. Liu, Y. Chen, W. Schnelle, H. Borrmann, Y. Grin, C. Felser, and B. Yan, Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal candidate NbP, Nat. Phys. 11, 645 (2015)
work page 2015
-
[33]
N. Kumar, Y. Sun, N. Xu, K. Manna, M. Yao, V. S¨ uss, I. Leermakers, O. Young, T. F¨ orster, M. Schmidt, H. Borrmann, B. Yan, U. Zeitler, M. Shi, C. Felser, and C. Shekhar, Extremely high magnetoresistance and conduc- tivity in the type-II Weyl semimetals WP2 and MoP2, Nat. Commun. 8, 1642 (2017)
work page 2017
-
[34]
F. F. Tafti, Q. D. Gibson, S. K. Kushwaha, N. Hal- dolaarachchige, and R. J. Cava, Resistivity plateau and extreme magnetoresistance in LaSb, Nat. Phys. 12, 272 (2015)
work page 2015
-
[35]
L. S. Lerner, Shubnikov-de Haas Effect in Bismuth, Phys. Rev. 127, 1480 (1962)
work page 1962
-
[36]
R. A. Hoffman, and D. R. Frankl, Electrical Transport Properties of Thin Bismuth Films, Phys. Rev. B 3, 1825 (1971)
work page 1971
-
[37]
C. A. Kukkonen, and K. F. Sohn, The low-temperature electrical resistivity of bismuth, J. Phys. F: Met. Phys. 7, L193 (1977)
work page 1977
-
[39]
D. Xiao, M.-C. Chang, and Q. Niu, Berry phase effects on electronic properties, Rev. Mod. Phys. 82, 1959 (2010)
work page 1959
-
[40]
Hofmann, The surfaces of bismuth: Structural and electronic properties, Prog
P. Hofmann, The surfaces of bismuth: Structural and electronic properties, Prog. Surf. Sci. 81, 191 (2006)
work page 2006
-
[41]
D. Wawrzika, J. I. Facioa, and J. van den Brink, Sur- face induced electronic Berry curvature in bulk Berry curvature free materials, Mater. Today Phys. 33, 101027 (2023). Supplemental Material: Anomalous Hall Effect in Thin Bismuth Oulin Yu, 1 F. Boivin, 1 A. Silberztein, 1 and G. Gervais 1 1Department of Physics, McGill University, Montr´ eal, Qu´ ebec,...
work page 2023
-
[42]
Oulin Yu, R. Allgayer, S. Godin, J. Lalande, P. Fossati, Chunwei Hsu, T. Szkopek, and G. Gervais. Method of Mechanical Exfoliation of Bismuth with Micro-Trench Structures, J. Appl. Phys. 134, 244302 (2023). 14
work page 2023
-
[43]
Oulin Yu, Sujatha Vijayakrishnan, R. Allgayer, T. Szkopek, and G. Gervais, Anomalous Hall Effect in Thin Bismuth, Phys. Rev. B 109, L121406 (2024)
work page 2024
-
[44]
H. H. Sample, W. J. Bruno, S. B. Sample, and E. K. Sichel, Reverse-field reciprocity for conducting specimens in magnetic fields, J. of Appl. Phys. 61, 1079 (1987)
work page 1987
-
[45]
Z. Zhu, B. Fauqu´ e, K. Behnia, and Y. Fuseya, Magnetoresistance and valley degree of freedom in bulk bismuth, J. Phys. Condens. Matter 30, 313001 (2018)
work page 2018
-
[46]
A. L. Jain, S. Suri, and K. Tanaka, Charge carrier densities and mobilities in bismuth, Phys. Lett. A 28, 435 (1968)
work page 1968
-
[47]
A. L. Jain, and S. H. Koenig, Electrons and Holes in Bismuth, Phys. Rev. 127, 442 (1962)
work page 1962
- [48]
-
[49]
N. Nagaosa, J. Sinova, S. Onoda, A. H. MacDonald, and N. P. Ong, Anomalous Hall effect, Rev. Mod. Phys. 82, 1539 (2010)
work page 2010
-
[50]
Y. Tian, L. Ye, and X. Jin, Proper Scaling of the Anomalous Hall Effect, Phys. Rev. Lett. 103, 087206 (2009)
work page 2009
-
[51]
T. Miyasato, N. Abe, T. Fujii, A. Asamitsu, S. Onoda, Y. Onose, N. Nagaosa, and Y. Tokura, Crossover Behavior of the Anomalous Hall Effect and Anomalous Nernst Effect in Itinerant Ferromagnets, Phys. Rev. Lett. 99, 086602 (2007)
work page 2007
-
[52]
L. Aggarwal, P. Zhu, T. L. Hughes, and M. Vidya, Evidence for higher order topology in Bi and Bi0.92Sb0.08, Nat. Commun. 12, 4420 (2021)
work page 2021
-
[53]
Schindler, et al, Higher-order topology in bismuth, Nat
F. Schindler, et al, Higher-order topology in bismuth, Nat. Phys. 14, 918 (2018)
work page 2018
-
[54]
Observation of 2D Weyl Fermion States in Epitaxial Bismuthene
Q. Lu, et al., Observation of 2D Weyl Fermion States in Epitaxial Bismuthene, arXiv:2303.02971, (2023)
work page internal anchor Pith review Pith/arXiv arXiv 2023
-
[55]
A. A. Burkov, Anomalous Hall Effect in Weyl Metals, Phys. Rev. Lett. 113, 187202 (2014)
work page 2014
-
[56]
Y. Messica, D. B. Gutman, and P. M. Ostrovsky, Anomalous Hall effect in disordered Weyl semimetals, Phys. Rev. B 108, 045121 (2023)
work page 2023
discussion (0)
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