Nature of the 1/9-magnetization plateau in the spin-1/2 kagome Heisenberg antiferromagnet

doi:10.1103/PhysRevB.107.L220401

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	Nature of the 1/9-magnetization plateau in the spin-1/2 kagome Heisenberg antiferromagnet
	Fang, Da-zhi ; Xi, Ning 1,2,3; Ran, Shi-Ju ; Su, Gang 5,6
刊名	PHYSICAL REVIEW B
	2023
卷号	107 期号:22 页码:L220401
ISSN号	2469-9950
DOI	10.1103/PhysRevB.107.L220401
英文摘要	The nature of the 1/9-magnetization plateau of the spin-1/2 kagome Heisenberg antiferromagnet remains controversial due to the exotic physical properties and high complexity induced by the geometrical frustration. Instead of a Z(3) quantum spin liquid revealed on a cylinder, we show on an infinite-size lattice that the 1/9 plateau can be described by a valence bond crystal (VBC) that breaks spatial translational invariance. Consistent results are achieved by two accurate tensor network methods, namely the full-update infinite projected-entangled pair states and the projected-entangled simplex states. The VBC exhibits an hourglass pattern with root 3 x root 3 spatial symmetry, demonstrated by magnetizations, bond energies, and three-body correlators. The spatial inversion symmetry in the root 3 x root 3 VBC is instantly broken with the presence of the difference between the coupling strengths in the up and down triangles, suggesting the existence of gapless excitations. The gapless nature of the 1/9 plateau is further indicated by the scaling behaviors of the entanglement entropy and the correlation length, which indicate a c = 1 conformal field theory.
学科主题	Materials Science ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/28028]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 2.Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China 3.Renmin Univ China, Beijing Key Lab Opto Elect Funct Mat & Micro Nano, Beijing 100872, Peoples R China 4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 5.Capital Normal Univ, Dept Phys, Ctr Quantum Phys & Intelligent Sci, Beijing 100048, Peoples R China 6.Univ Chinese Acad Sci, Kavli Inst Theoret Sci, Beijing 100190, Peoples R China 7.Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Fang, Da-zhi,Xi, Ning,Ran, Shi-Ju,et al. Nature of the 1/9-magnetization plateau in the spin-1/2 kagome Heisenberg antiferromagnet[J]. PHYSICAL REVIEW B,2023,107(22):L220401.
APA	Fang, Da-zhi,Xi, Ning,Ran, Shi-Ju,&Su, Gang.(2023).Nature of the 1/9-magnetization plateau in the spin-1/2 kagome Heisenberg antiferromagnet.PHYSICAL REVIEW B,107(22),L220401.
MLA	Fang, Da-zhi,et al."Nature of the 1/9-magnetization plateau in the spin-1/2 kagome Heisenberg antiferromagnet".PHYSICAL REVIEW B 107.22(2023):L220401.