Absence of Magnetic Thermal Conductivity in the Quantum Spin Liquid Candidate EtMe3Sb[Pd(dmit)2]2

被引：66

作者：

Ni, J. M. ^{[1
,2
]}

Pan, B. L. ^{[1
,2
]}

Song, B. Q. ^{[1
,2
]}

Huang, Y. Y. ^{[1
,2
]}

Zeng, J. Y. ^{[1
,2
]}

Yu, Y. J. ^{[1
,2
]}

Cheng, E. J. ^{[1
,2
]}

Wang, L. S. ^{[1
,2
]}

Dai, D. Z. ^{[1
,2
]}

Kato, R. ^{[3
]}

Li, S. Y. ^{[1
,2
,4
]}

机构：

[1] Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200438, Peoples R China

[2] Fudan Univ, Adv Mat Lab, Shanghai 200438, Peoples R China

[3] RIKEN, Condensed Mol Mat Lab, Wako, Saitama 3510198, Japan

[4] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 24期

关键词：

STATE; TRANSPORT;

D O I：

10.1103/PhysRevLett.123.247204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the ultralow-temperature specific heat and thermal conductivity measurements on single crystals of triangular-lattice compound EtMe3Sb[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. 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 T. These results are in sharp contrast to previous thermal conductivity measurements on EtMe3Sb[Pd(dmit)(2)](2) [M. Yamashita et al., Science 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 EEtMe3Sb[Pd(dmit)(2)](2) has to be reconsidered.

引用

页数：6

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