文献类型：期刊文献

中文题名：Spin-Peierls Instability in the Ferromagnetic Heisenberg Ladder

英文题名：Spin-Peierls Instability in the Ferromagnetic Heisenberg Ladder

作者：Xu Yin-Jie[1,2];Zhao Hui[1,2];Chen Yu-Guang[1,2];Yan Yong-Hong[3]

机构：[1]Tongji Univ, Key Lab Adv Microstruct Mat, Minist Educ, Shanghai 200092, Peoples R China;[2]Tongji Univ, Dept Phys, Shanghai 200092, Peoples R China;[3]Shaoxing Univ, Dept Phys, Shaoxing 312000, Peoples R China

年份：2013

卷号：30

期号：3

中文期刊名：中国物理快报：英文版

外文期刊名：CHINESE PHYSICS LETTERS

收录：SCI-EXPANDED(收录号：WOS:000316114000042)、CSTPCD、、EI(收录号：20220711656706)、Scopus(收录号：2-s2.0-84875336141)、WOS、CSCD、CSCD2013_2014

基金：Supported by the National Natural Science Foundation of China under Grant No 10904112 and the Qianjiang Talent Project under Grant No 2012R10074.

语种：英文

中文关键词：transition.;method.;dimer;

外文关键词：Dimerization - Ferromagnetic materials - Ising model - Quantum entanglement - Statistical mechanics

中文摘要：A two-leg S=1/2 spin ladder with ferromagnetic rung coupling is investigated to reveal the phase transition between the Haldane and columnar dimer phase.The elastic lattice with the elastic force K is introduced into the system,which induces unstable spin chains towards the spontaneous dimerization.When the rung coupling is strong enough,the dimerization along the legs is suppressed and the spin ladder undergoes a phase transition.The dimerization amplitude is calculated self-consistently by the density-matrix renormalization group method.To determine the phase transition boundary,the spin gap,the columnar dimer order parameter and the block-block entanglement entropy are calculated.Our results show that the phase boundary between the columnar dimer phase and Haldane phase follows the power law J_(t)-K^(-α).

外文摘要：A two-leg S = 1/2 spin ladder with ferromagnetic rung coupling is investigated to reveal the phase transition between the Haldane and columnar dimer phase. The elastic lattice with the elastic force.. is introduced into the system, which induces unstable spin chains towards the spontaneous dimerization. When the rung coupling is strong enough, the dimerization along the legs is suppressed and the spin ladder undergoes a phase transition. The dimerization amplitude is calculated self-consistently by the density-matrix renormalization group method. To determine the phase transition boundary, the spin gap, the columnar dimer order parameter and the block-block entanglement entropy are calculated. Our results show that the phase boundary between the columnar dimer phase and Haldane phase follows the power law J(t) similar to K-alpha.