Gapless quantum spin liquid ground state in the two-dimensional spin-1/2 triangular antiferromagnet YbMgGaO4

	Gapless quantum spin liquid ground state in the two-dimensional spin-1/2 triangular antiferromagnet YbMgGaO4
	Li, YS; Liao, HJ; Zhang, Z; Li, SY; Jin, F; Ling, LS; Zhang, L; Zou, YM; Pi, L; Yang, ZR
刊名	SCIENTIFIC REPORTS
	2015
卷号	5 页码:16419
英文摘要	Quantum spin liquid (QSL) is a novel state of matter which refuses the conventional spin freezing even at 0 K. Experimentally searching for the structurally perfect candidates is a big challenge in condensed matter physics. Here we report the successful synthesis of a new spin-1/2 triangular antiferromagnet YbMgGaO4 with R (3) over barm symmetry. The compound with an ideal two-dimensional and spatial isotropic magnetic triangular-lattice has no site-mixing magnetic defects and no antisymmetric Dzyaloshinsky-Moriya (DM) interactions. No spin freezing down to 60 mK (despite theta(w) similar to -4 K), the power-law temperature dependence of heat capacity and nonzero susceptibility at low temperatures suggest that YbMgGaO4 is a promising gapless (<=vertical bar theta(w)vertical bar/100) QSL candidate. The residual spin entropy, which is accurately determined with a non-magnetic reference LuMgGaO4, approaches zero (< 0.6%). This indicates that the possible QSL ground state (GS) of the frustrated spin system has been experimentally achieved at the lowest measurement temperatures.
学科主题	Science & Technology - Other Topics
类目[WOS]	Multidisciplinary Sciences
收录类别	SCI
WOS记录号	WOS:000364384300001
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228827]
专题	高能物理研究所_多学科研究中心
推荐引用方式 GB/T 7714	Li, YS,Liao, HJ,Zhang, Z,et al. Gapless quantum spin liquid ground state in the two-dimensional spin-1/2 triangular antiferromagnet YbMgGaO4[J]. SCIENTIFIC REPORTS,2015,5:16419.
APA	Li, YS.,Liao, HJ.,Zhang, Z.,Li, SY.,Jin, F.,...&吴忠华.(2015).Gapless quantum spin liquid ground state in the two-dimensional spin-1/2 triangular antiferromagnet YbMgGaO4.SCIENTIFIC REPORTS,5,16419.
MLA	Li, YS,et al."Gapless quantum spin liquid ground state in the two-dimensional spin-1/2 triangular antiferromagnet YbMgGaO4".SCIENTIFIC REPORTS 5(2015):16419.