ALTERNATING S=1/2 XY CHAIN IN THE LORENTZIAN RANDOM FIELD

被引：14

作者：

OKAMOTO, K

机构：

[1] Department of Physics, Faculty of Science, Tokyo Institute of Technology, Meguro

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1990年 / 59卷 / 12期

关键词：

XY MODEL; XY CHAIN; BOND ALTERNATION; DIMERIZATION; SPIN-PEIERLS TRANSITION JORDAN-WIGNER TRANSFORMATION; RANDOM FIELD; LORENTZIAN FIELD; SPIN CORRELATION;

D O I：

10.1143/JPSJ.59.4286

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The alternating S = 1/2 XY chain in the Lorentzian random field in the z-direction is investigated by the use of the pseudo-Fermion representation. The random-averaged one-particle Green's functions for the pseudo-Fermions are exactly calculated, which enables us to exactly construct the thermodymanics of this model. The spin correlation function < S(i)zS(j)z > is also studied at T = 0. The dimerized state (which is the ground state in the absence of the random field) is completely destroyed by any small (but finite) amount of the random field.

引用

页码：4286 / 4296

页数：11

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