Muon Spin Relaxation Evidence for the U(1) Quantum Spin-Liquid Ground State in the Triangular Antiferromagnet YbMgGaO4

被引：74

作者：

Li, Yuesheng ^{[1
,2
]}

Adroja, Devashibhai ^{[3
,4
]}

Biswas, Pabitra K. ^{[3
]}

Baker, Peter J. ^{[3
]}

Zhang, Qian ^{[1
]}

Liu, Juanjuan ^{[1
]}

Tsirlin, Alexander A. ^{[2
]}

Gegenwart, Philipp ^{[2
]}

Zhang, Qingming ^{[1
,5
]}

机构：

[1] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[2] Univ Augsburg, Ctr Elect Correlat & Magnetism, Expt Phys 6, D-86159 Augsburg, Germany

[3] STFC Rutherford Appleton Lab, ISIS Pulsed Neutron & Muon Source, Harwell Campus, Didcot OX11 0QX, Oxon, England

[4] Univ Johannesburg, Dept Phys, Highly Correlated Matter Res Grp, POB 524, ZA-2006 Auckland Pk, South Africa

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

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 09期

关键词：

VALENCE BOND STATE; HEISENBERG-ANTIFERROMAGNET; LATTICE; DYNAMICS; ORDER; GLASSES; MAGNET;

D O I：

10.1103/PhysRevLett.117.097201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Muon spin relaxation (mu SR) experiments on single crystals of the structurally perfect triangular antiferromagnet YbMgGaO4 indicate the absence of both static long-range magnetic order and spin freezing down to 0.048 K in a zero field. Below 0.4 K, the mu(+) spin relaxation rates, which are proportional to the dynamic correlation function of the Yb3+ spins, exhibit temperature-independent plateaus. All these mu SR results unequivocally support the formation of a gapless U(1) quantum spin liquid ground state in the triangular antiferromagnet YbMgGaO4.

引用

页数：6

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