中国物理B ›› 2022, Vol. 31 ›› Issue (8): 87505-087505.doi: 10.1088/1674-1056/ac5e97

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Low-temperature heat transport of the zigzag spin-chain compound SrEr2O4

Liguo Chu(褚利国)1, Shuangkui Guang(光双魁)1, Haidong Zhou(周海东)2, Hong Zhu(朱弘)1, and Xuefeng Sun(孙学峰)1,3,†   

  1. 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
  • 收稿日期:2022-03-08 修回日期:2022-03-16 接受日期:2022-03-17 出版日期:2022-07-18 发布日期:2022-07-29
  • 通讯作者: Xuefeng Sun E-mail:xfsun@ustc.edu.cn
  • 基金资助:
    We thank Jichuan Wu for helps on experiments. Project supported by the National Natural Science Foundation of China (Grant Nos. U1832209 and 11874336). The work at the University of Tennessee (H D Zhao) was supported by the NSF with Grant No. NSF-DMR-2003117.

Low-temperature heat transport of the zigzag spin-chain compound SrEr2O4

Liguo Chu(褚利国)1, Shuangkui Guang(光双魁)1, Haidong Zhou(周海东)2, Hong Zhu(朱弘)1, and Xuefeng Sun(孙学峰)1,3,†   

  1. 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
  • Received:2022-03-08 Revised:2022-03-16 Accepted:2022-03-17 Online:2022-07-18 Published:2022-07-29
  • Contact: Xuefeng Sun E-mail:xfsun@ustc.edu.cn
  • Supported by:
    We thank Jichuan Wu for helps on experiments. Project supported by the National Natural Science Foundation of China (Grant Nos. U1832209 and 11874336). The work at the University of Tennessee (H D Zhao) was supported by the NSF with Grant No. NSF-DMR-2003117.

摘要: Low-temperature thermal conductivity ($\kappa$), as well as the magnetic properties and specific heat, are studied for the frustrated zigzag spin-chain material SrEr$_{2}$O$_{4}$ by using single-crystal samples. The specific heat data indicate the long-range antiferromagnetic transition at $\sim 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. The $\kappa $ shows 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 of $\kappa $. 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

Abstract: Low-temperature thermal conductivity ($\kappa$), as well as the magnetic properties and specific heat, are studied for the frustrated zigzag spin-chain material SrEr$_{2}$O$_{4}$ by using single-crystal samples. The specific heat data indicate the long-range antiferromagnetic transition at $\sim 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. The $\kappa $ shows 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 of $\kappa $. 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.

Key words: spin chain, quantum spin system, thermal conductivity

中图分类号:  (Studies of specific magnetic materials)

  • 75.50.-y
75.50.Ee (Antiferromagnetics)