Spin-Glass Ground State in a Triangular-Lattice Compound YbZnGaO4

被引：149

作者：

Ma, Zhen ^{[1
,2
]}

Wang, Jinghui ^{[1
,2
]}

Dong, Zhao-Yang ^{[1
,2
]}

Zhang, Jun ^{[3
,4
]}

Li, Shichao ^{[1
,2
]}

Zheng, Shu-Han ^{[1
,2
]}

Yu, Yunjie ^{[3
,4
]}

Wang, Wei ^{[1
,2
]}

Che, Liqiang ^{[5
,6
]}

Ran, Kejing ^{[1
,2
]}

Bao, Song ^{[1
,2
]}

Cai, Zhengwei ^{[1
,2
]}

Cermak, P. ^{[7
]}

Schneidewind, A. ^{[7
]}

Yano, S. ^{[8
]}

Gardner, J. S. ^{[8
,9
]}

Lu, Xin ^{[5
,6
,10
]}

Yu, Shun-Li ^{[1
,2
,3
,4
,10
]}

Liu, Jun-Ming ^{[1
,2
,10
]}

Li, Shiyan ^{[10
]}

Li, Jian-Xin ^{[1
,2
,10
]}

Wen, Jinsheng ^{[1
,2
,10
]}

机构：

[1] Nanjing Univ, Nalt Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

[3] Fudan Univ, Dept Phys, State Key Lab Surface Phys, Shanghai 200433, Peoples R China

[4] Fudan Univ, Lab Adv Mat, Shanghai 200433, Peoples R China

[5] Zhejiang Univ, Ctr Correlated Matter, Hangzhou 310058, Zhejiang, Peoples R China

[6] Zhejiang Univ, Dept Phys, Hangzhou 310058, Zhejiang, Peoples R China

[7] Forschungszentrum Julich, Heinz Maier Leibnitz Zentrum MLZ, JCNS, Lichtenbergstr 1, D-85748 Garching, Germany

[8] Natl Synchrotron Radiat Res Ctr, Hsinchu 30077, Taiwan

[9] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 10617, Taiwan

[10] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 08期

基金：

中国国家自然科学基金;

关键词：

RESONATING VALENCE BONDS; LIQUID; EXCITATIONS;

D O I：

10.1103/PhysRevLett.120.087201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on comprehensive results identifying the ground state of a triangular-lattice structured YbZnGaO4 as a spin glass, including no long-range magnetic order, prominent broad excitation continua, and the absence of magnetic thermal conductivity. More crucially, from the ultralow-temperature ac susceptibility measurements, we unambiguously observe frequency-dependent peaks around 0.1 K, indicating the spin-glass ground state. We suggest this conclusion holds also for its sister compound YbMgGaO4, which is confirmed by the observation of spin freezing at low temperatures. We consider disorder and frustration to be the main driving force for the spin-glass phase.

引用

页数：5

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