典型文献
Quantum Spin Liquid Phase in the Shastry-Sutherland Model Detected by an Improved Level Spectroscopic Method
文献摘要：
We study the spin-1/2 two-dimensional Shastry-Sutherland spin model by exact diagonalization of clusters with periodic boundary conditions,developing an improved level spectroscopic technique using energy gaps between states with different quantum numbers.The crossing points of some of the relative(composite)gaps have much weaker finite-size drifts than the normally used gaps defined only with respect to the ground state,thus allowing precise determination of quantum critical points even with small clusters.Our results support the picture of a spin liquid phase intervening between the well-known plaquette-singlet and antiferromagnetic ground states,with phase boundaries in almost perfect agreement with a recent density matrix renormalization group study,where much larger cylindrical lattices were used[J.Yang et al.,Phys.Rev.B 105,L060409(2022)].The method of using composite low-energy gaps to reduce scaling corrections has potentially broad applications in numerical studies of quantum critical phenomena.
文献关键词：
中图分类号：
作者姓名：
Ling Wang;Yalei Zhang;Anders W.Sandvik
作者机构：
Department of Physics,Zhejiang University,Hangzhou 310000,China;Beijing Computational Science Research Center,Beijing 100193,China;Department of Physics,Boston University,Boston,Massachusetts 02215,USA;Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China
文献出处：
引用格式：
[1]Ling Wang;Yalei Zhang;Anders W.Sandvik-.Quantum Spin Liquid Phase in the Shastry-Sutherland Model Detected by an Improved Level Spectroscopic Method)[J].中国物理快报（英文版）,2022(07):137-148
A类：
Shastry,Detected,plaquette,L060409
B类：
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AB值：
0.667906
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