Anomalous Thermal Conductivity and Magnetic Torque Response in the Honeycomb Magnet α-RuCl3

被引：187
作者：
Leahy, Ian A. [1 ]
Pocs, Christopher A. [1 ]
Siegfried, Peter E. [1 ]
Graf, David [2 ]
Do, S. -H. [3 ]
Choi, Kwang-Yong [3 ]
Normand, B. [4 ]
Lee, Minhyea [1 ]
机构：
[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA
[2] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
[3] Chung Ang Univ, Dept Phys, Seoul 790784, South Korea
[4] Paul Scherrer Inst, Lab Neutron Scattering & Imaging, CH-5232 Villigen, Switzerland
来源：
PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 18期
基金：
美国国家科学基金会; 新加坡国家研究基金会;
关键词：
QUANTUM SPIN-LIQUID; TRANSPORT; MODEL;
D O I：
10.1103/PhysRevLett.118.187203
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report on the unusual behavior of the in-plane thermal conductivity. and torque tau response in the Kitaev-Heisenberg material alpha-RuCl3. kappa shows a striking enhancement with linear growth beyond H = 7 T, where magnetic order disappears, while t for both of the in-plane symmetry directions shows an anomaly at the same field. The temperature and field dependence of kappa are far more complex than conventional phonon and magnon contributions, and require us to invoke the presence of unconventional spin excitations whose properties are characteristic of a field-induced spin-liquid phase related to the enigmatic physics of the Kitaev model in an applied magnetic field.
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页数：6
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