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Exploring rare-earth based spin frustrated systems

ORAL · Invited

Abstract

Rare-earth spin frustrated systems featured by strong spin-orbit coupling are distinctly different from their cousins built on 3d magnetic ions in many aspects. Rare-earth ions output a highly anisotropic magnetism which brings many exotic spin phases including quantum spin liquid, and can act as building blocks for a bond-dependent Kitaev spin system. In this talk, I will briefly introduce two rare-earth based spin frustrated families we revealed in recent years. One is the triangular lattice rare-earth chalcogenide ARECh2 (A=alkali or monovalent ions, RE=rare earth, Ch=chalcogen) which appears as a large family of QSL candidates. The other one is van der Waals layered Kitaev spin system REChX (RE=rare earth, Ch=chalcogen, X=halogen). Our studies show that the two families offer an inspiring platform for exploring spin liquid phases, particularly Kitaev physics and its potential applications.

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Publication: 1. Zheng Zhang, Jianshu Li, Mingtai Xie, Weizhen Zhuo, D. T. Adroja, Peter J. Baker, T. G. Perring, Anmin Zhang, Feng Jin, Jianting Ji, Xiaoqun Wang, Jie Ma, and Qingming Zhang<br>Low-energy spin dynamics of the quantum spin liquid candidate NaYbSe2 <br>PHYSICAL REVIEW B 106, 085115 (2022) <br>2. Zheng Zhang, Yanzhen Cai, Jing Kang, Zhongwen Ouyang, Zhitao Zhang, Anmin Zhang, Jianting Ji, Feng Jin, and Qingming Zhang<br>Anisotropic exchange coupling and ground state phase diagram of Kitaev compound YbOCl<br>PHYSICAL REVIEW RESEARCH 4, 033006 (2022)<br>3. Zheng Zhang, Jianshu Li, Weiwei Liu, Zhitao Zhang, Jianting Ji, Feng Jin, Rui Chen, Junfeng Wang, Xiaoqun Wang, Jie Ma, and Qingming Zhang<br>Effective magnetic Hamiltonian at finite temperatures for rare-earth chalcogenides<br>PHYSICAL REVIEW B 103, 184419 (2021)<br>4. Zheng Zhang, Xiaoli Ma, Jianshu Li, Guohua Wang, D. T. Adroja, T. P. Perring, Weiwei Liu, Feng Jin, Jianting Ji, Yimeng Wang, Yoshitomo Kamiya, Xiaoqun Wang, Jie Ma, and Qingming Zhang<br>Crystalline electric field excitations in the quantum spin liquid candidate NaYbSe2<br>PHYSICAL REVIEW B 103, 035144 (2021)<br>5. Jianting Ji, Mengjie Sun, Yanzhen Cai, Yimeng Wang, Yingqi Sun, Wei Ren, Zheng Zhang, Feng Jin, and Qingming Zhang<br>Rare-Earth Chalcohalides: A Family of van der Waals Layered Kitaev Spin Liquid Candidates<br>CHIN. PHYS. LETT. 38, 047502 (2021)<br>6. Weiwei Liu, Zheng Zhang, Jianting Ji, Yixuan Liu, Jianshu Li, Xiaoqun Wang, Hechang Lei, Gang Chen, and Qingming Zhang<br>Rare-earth chalcogenides: A large family of triangular lattice spin liquid candidates<br>Chin. Phys. Lett. (Express Letters) 35, 117501 (2018)

Presenters

  • Qingming Zhang

    Lanzhou University/Institute of Physics

Authors

  • Qingming Zhang

    Lanzhou University/Institute of Physics