Low-temperature heat transport of the zigzag spin-chain compound SrEr_(2)O_(4)  

作　　者：Liguo Chu Shuangkui Guang Haidong Zhou Hong Zhu Xuefeng Sun 褚利国;光双魁;周海东;朱弘;孙学峰(Department of Physics,Key Laboratory of Strongly-Coupled Quantum Matter Physics(CAS),University of Science and Technology of China,Hefei 230026,China;Department of Physics and Astronomy,University of Tennessee,Knoxville,Tennessee 37996-1200,USA;Institute of Physical Science and Information Technology,Anhui University,Hefei 230601,China)

机构地区：[1]Department of Physics,Key Laboratory of Strongly-Coupled Quantum Matter Physics(CAS),University of Science and Technology of China,Hefei 230026,China [2]Department of Physics and Astronomy,University of Tennessee,Knoxville,Tennessee 37996-1200,USA [3]Institute of Physical Science and Information Technology,Anhui University,Hefei 230601,China

出　　处：《Chinese Physics B》2022年第8期621-626,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.U1832209 and 11874336);the University of Tennessee(H D Zhao)was supported by the NSF with Grant No.NSF-DMR-2003117。

摘　　要：Low-temperature thermal conductivity(κ),as well as the magnetic properties and specific heat,are studied for the frustrated zigzag spin-chain material Sr Er_(2)O_(4)by using single-crystal samples.The specific heat data indicate the longrange antiferromagnetic transition at~0.73 K and the existence of strong magnetic fluctuations.The magnetizations at very low temperatures for magnetic field along the c axis(spin chain direction)or the a axis reveal the field-induced magnetic transitions.Theκshows a strong dependence on magnetic field,applied along the c axis or the a axis,which is closely related to the magnetic transitions.Furthermore,high magnetic field induces a strong increase ofκ.These results indicate that thermal conductivity along either the c axis or the a axis are mainly contributed by phonons,while magnetic excitations play a role of scattering phonons.

关 键 词：spin chain quantum spin system thermal conductivity 

分 类 号：O469[理学—凝聚态物理]