Absence of magnetic thermal conductivity in the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2 -- revisited

B. L. Pan; E. J. Cheng; J. M. Ni; J. Y. Zeng; L. S. Wang; R. Kato; S. Y. Li; Y. J. Yu; Y. Y. Huang

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Absence of magnetic thermal conductivity in the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2 -- revisited

J. M. Ni, B. L. Pan, Y. Y. Huang, J. Y. Zeng, Y. J. Yu, E. J. Cheng, L. S. Wang, R. Kato

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S. Y. Li

Strongly Correlated Electrons · Submitted 23 Apr 2019

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim In this context, the true ground state of EtMe$_3$Sb[Pd(dmit)$_2$]$_2$ has to be reconsidered.

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arXiv ID1904.10395 (version 2)

Pith IDLSE76OGB, Pith's permanent record of this paper and its review

CitationB. L. Pan, E. J. Cheng, J. M. Ni, J. Y. Zeng, L. S. Wang, R. Kato, S. Y. Li, Y. J. Yu, Y. Y. Huang. "Absence of magnetic thermal conductivity in the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2 -- revisited." arXiv:1904.10395 (2019). https://pith.science/paper/LSE76OGB

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arXiv listing abstract v2. Results and the main claim are underlined; show every role.

We present the ultralow-temperature specific heat and thermal conductivity measurements on single crystals of triangular-lattice organic compound EtMe$_3$Sb[Pd(dmit)$_2$]$_2$, which has long been considered as a gapless quantum spin liquid candidate. In specific heat measurements, a finite linear term is observed, consistent with the previous work [S. Yamashita $et$ $al.$, Nat. Commun. {\bf 2}, 275 (2011)]. However, we do not observe a finite residual linear term in the thermal conductivity measurements, and the thermal conductivity does not change in a magnetic field of 6 Tesla. These results are in sharp contrast to previous thermal conductivity measurements on EtMe$_3$Sb[Pd(dmit)$_2$]$_2$ [M. Yamashita $et$ $al.$ Science {\bf 328}, 1246 (2010)], in which a huge residual linear term was observed and attributed to highly mobile gapless excitations, likely the spinons of a quantum spin liquid. In this context, the true ground state of EtMe$_3$Sb[Pd(dmit)$_2$]$_2$ has to be reconsidered.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#	sentence	role	the authors' own work	states the main conclusion	strength
s0	We present the ultralow-temperature specific heat and thermal conductivity measurements on single crystals of triangular-lattice organic compound EtMe$_3$Sb[Pd(dmit)$_2$]$_2$, which has long been considered as a gapless quantum spin liquid candidate.	contribution 0.99	0.94	0.06	asserted 0.97
s1	In specific heat measurements, a finite linear term is observed, consistent with the previous work [S.	result 1.00	0.89	0.05	asserted 0.63
s2	Yamashita $et$ $al.$, Nat. Commun. {\bf 2}, 275 (2011)].	background 0.53	0.10	0.02	unclear 0.84
s3	However, we do not observe a finite residual linear term in the thermal conductivity measurements, and the thermal conductivity does not change in a magnetic field of 6 Tesla.	result 1.00	0.96	0.49	asserted 1.00
s4	These results are in sharp contrast to previous thermal conductivity measurements on EtMe$_3$Sb[Pd(dmit)$_2$]$_2$ [M.	result 0.38	0.47	0.10	asserted 1.00
s5	Yamashita $et$ $al.$ Science {\bf 328}, 1246 (2010)], in which a huge residual linear term was observed and attributed to highly mobile gapless excitations, likely the spinons of a quantum spin liquid.	background 0.98	0.03	0.08	asserted 0.54
s6	In this context, the true ground state of EtMe$_3$Sb[Pd(dmit)$_2$]$_2$ has to be reconsidered.	interpretation 0.99	0.17	0.72	asserted 0.69

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from observation or experiment 1.00.

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arXiv listing abstract v2

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P abstract

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S sections
T body sentences
C citations
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The paper

Original abstract

We present the ultralow-temperature specific heat and thermal conductivity measurements on single crystals of triangular-lattice organic compound EtMe$_3$Sb[Pd(dmit)$_2$]$_2$, which has long been considered as a gapless quantum spin liquid candidate. In specific heat measurements, a finite linear term is observed, consistent with the previous work [S. Yamashita $et$ $al.$, Nat. Commun. {\bf 2}, 275 (2011)]. However, we do not observe a finite residual linear term in the thermal conductivity measurements, and the thermal conductivity does not change in a magnetic field of 6 Tesla. These results are in sharp contrast to previous thermal conductivity measurements on EtMe$_3$Sb[Pd(dmit)$_2$]$_2$ [M. Yamashita $et$ $al.$ Science {\bf 328}, 1246 (2010)], in which a huge residual linear term was observed and attributed to highly mobile gapless excitations, likely the spinons of a quantum spin liquid. In this context, the true ground state of EtMe$_3$Sb[Pd(dmit)$_2$]$_2$ has to be reconsidered.

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References

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6 arXiv papers cite this in 9 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers whose main result relates to this one's

Found among the papers closest to this one by title and main claim. Pith's classifier compared each pair's main results and a second model family confirmed the relation; checked against two further families, shown conflicts agreed 118 times in 120 and shown same results 218 times in 239. The quoted sentence is the other paper's main claim.

States the same result 1 paper

We conclude that there are no mobile gapless excitations in this spin liquid candidate, in contrast with a prior study of dmit-131 that reported a large $\kappa_0/T$ value [Yamashita et al., Science 328, 1246 (2010)].

Thermal conductivity of the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2: No evidence of mobile gapless excitations · 0.92

States a conflicting result 4 papers

We employ thermal transport measurements on newly discovered QSL candidates, $\kappa$-(BEDT-TTF)2Cu2(CN)3 and EtMe3Sb[Pd(dmit)2]2, and report that the two organic insulators possess different QSLs characterized by different elementary excitations.

Thermal-transport studies of Two-dimensional Quantum Spin Liquids · 0.98
Our analysis of the conductivity allows us to reveal a strong dependence of the effective mass of spinons on magnetic fields, to detect a scaling behavior of the conductivity, and to relate it to both the spin-lattice relaxation rate and the magnetoresistivity.

Heat transport in magnetic fields by quantum spin liquid in the organic insulators EtMe3Sb[Pd(dmit)2]2 and \kappa-(BEDT-TTF)2Cu2(CN)3 · 0.94
The resultant thermal conductances $\kappa_{xx}$ and $\kappa_{xy}$ qualitatively agree with the experimental results on the material EtMe$_3$Sb[Pd(dmit)$_2]_2$.

Thermal Properties and Instability of a $U(1)$ Spin Liquid on the Triangular Lattice · 0.91
The present results provide evidence that the true ground state of EtMe$_3$Sb[Pd(dmit)$_2$]$_2$ is likely to be a quantum spin liquid with itinerant gapless excitations.

Presence and absence of itinerant gapless excitations in the quantum spin liquid candidate EtMe$_3$Sb[Pd(dmit)$_2$]$_2$ · 0.80

Papers citing it · 6 sentences without a confident label

Compares with it 2 papers

In Fig. [ref] we compare the thermal conductivity of these four materials with that of dmit-131 as reported by the Kyoto group [ref] , the Fudan group [ref] , and ourselves.

Thermal conductivity of the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2: No evidence of mobile gapless excitations · Discussion · 1.00
[ref] , the non-magnetic compound [ref] , another QSL candidate [ref] , quasi two-dimensional superconductors $κ$-(BEDT-TTF)$_2$Cu(NCS)$_2$ [ref] and $λ$-(BETS)$_2$GaCl$_4$ [ref] , and amorphous solids (vitreous silica and pyrex) [ref] .

Boundary-limited and glassy-like phonon thermal conduction in EtMe$_3$Sb[Pd(dmit)$_2$]$_2$ · Introduction · 0.98

Cites it as background 1 paper

The most promising candidates to date include the mineral herbertsmithite [ref] , certain organic salt compounds [ref] , and the so-called Kitaev materials [ref] , and their experimental studies have ranged from nuclear magnetic resonance [ref] , to susceptibility and heat capacity investigations [ref] , to thermal transport studies [ref] , and to neutron scattering [ref] .

Probing quantum spin liquids in equilibrium using the inverse spin Hall effect · Introduction · 0.92

What it cites

Cites as background 1 paper

We are aware of a similar thermal conductivity study of EtMe$_3$Sb[Pd(dmit)$_2$]$_2$ single crystals by the Taillefer group in Sherbrooke [ref] .

Thermal conductivity of the quantum spin liquid candidate EtMe3Sb[Pd(dmit)2]2: No evidence of mobile gapless excitations · Introduction · 0.85

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