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

被引：89
|
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.
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页数：6
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