中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 合肥物质科学研究院
  3. 中国科学院合肥物质科学研究院
Effective magnetic Hamiltonian at finite temperatures for rare-earth chalcogenides

文献类型：期刊论文

作者Zhang, Zheng2,3; Li, Jianshu2,3; Liu, Weiwei2,3; Zhang, Zhitao4; Ji, Jianting3; Jin, Feng3; Chen, Rui5,6; Wang, Junfeng5,6; Wang, Xiaoqun1; Ma, Jie1
刊名PHYSICAL REVIEW B
出版日期2021-05-18
卷号103
ISSN号2469-9950
DOI10.1103/PhysRevB.103.184419
通讯作者Zhang, Qingming()
英文摘要Alkali-metal rare-earth chalcogenide ARECh(2) (A = alkali or monovalent metal, RE = rare earth, Ch = O, S, Se, Te) is a large family of quantum spin liquid candidates we discovered recently. Unlike YbMgGaO4, most members in the family, except for the oxide ones, have a relatively small crystalline electric field (CEF) energy gap from the ground state to the first excited state. This makes the conventional Curie-Weiss analysis at finite temperatures inapplicable and the CEF excitations may play an essential role in understanding the low-energy spin physics. Here we consider an effective magnetic Hamiltonian incorporating the CEF excitations and spin-spin interactions, to accurately describe thermodynamics in such a system. By taking NaYbSe2 as an example, we were able to analyze magnetic susceptibility, magnetization under pulsed high fields, and heat capacity systematically and comprehensively. The analysis allows us to produce accurate anisotropic exchange coupling energies and unambiguously determine a crossover temperature (similar to 25 K in the case of NaYbSe2), below which the CEF effects fade away and pure spin-spin interactions stand out. We further validated the effective picture by successfully explaining the anomalous temperature dependence of electron spin resonance spectral width. The effective scenario in principle can be generalized to other rare-earth spin systems with small CEF excitations.
WOS关键词GROUND-STATE
资助项目National Key Research and Development Program of China[2017YFA0302904] ; National Key Research and Development Program of China[2016YFA0300504] ; NSF of China[U1932215] ; NSF of China[11774419] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB33010100] ; Users with Excellence Program of Hefei Science Center and High Magnetic Field Facility, CAS
WOS研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:000655872300003
出版者AMER PHYSICAL SOC
资助机构National Key Research and Development Program of China ; NSF of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Users with Excellence Program of Hefei Science Center and High Magnetic Field Facility, CAS
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/123706]  
专题中国科学院合肥物质科学研究院
通讯作者Zhang, Qingming
作者单位1.Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China
2.Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China
3.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, Hefei 230031, Peoples R China
5.Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China
6.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
7.Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Zheng,Li, Jianshu,Liu, Weiwei,et al. Effective magnetic Hamiltonian at finite temperatures for rare-earth chalcogenides[J]. PHYSICAL REVIEW B,2021,103.
APA Zhang, Zheng.,Li, Jianshu.,Liu, Weiwei.,Zhang, Zhitao.,Ji, Jianting.,...&Zhang, Qingming.(2021).Effective magnetic Hamiltonian at finite temperatures for rare-earth chalcogenides.PHYSICAL REVIEW B,103.
MLA Zhang, Zheng,et al."Effective magnetic Hamiltonian at finite temperatures for rare-earth chalcogenides".PHYSICAL REVIEW B 103(2021).

入库方式： OAI收割

来源：合肥物质科学研究院

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。