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题名: Effects of Gaussian disorder on the dynamics of the random transverse Ising model
作者: Liu, ZQ ;  Kong, XM ;  陈晓松
刊名: PHYSICAL REVIEW B
出版日期: 2006
卷号: 73, 期号:22, 页码:-
关键词: DIMENSIONAL XY-MODEL ;  CONTINUED-FRACTION REPRESENTATION ;  GENERALIZED LANGEVIN EQUATION ;  SPIN-CORRELATION-FUNCTIONS ;  INFINITE TEMPERATURE ;  RECURRENCE RELATIONS ;  4-SPIN INTERACTIONS ;  FINITE-TEMPERATURE ;  CHAIN ;  FIELD
学科分类: Physics
通讯作者: Kong, XM , Qufu Normal Univ, Dept Phys, Qufu 273165, Peoples R China
部门归属: Qufu Normal Univ, Dept Phys, Qufu 273165, Peoples R China; Chinese Acad Sci, Interdisciplinary Ctr Theoret Studies, Beijing 100080, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: The effects of Gaussian disorder on the dynamics of the one-dimensional spin-1/2 random transverse Ising model are studied in the high-temperature limit by the recursion method. Both spin autocorrelation functions and the corresponding spectral densities are calculated for three types of disordered cases. It is found that when the standard deviation sigma(J) of the exchange coupling (or the standard deviation sigma(B) of the random transverse field) is small, the dynamics of the system undergoes two crossovers in sequence as the mean value of the exchange coupling (or the random transverse field) varies: from a central-peak behavior to a collective-mode one, and then to the precession of free spins in an external transverse magnetic field. However, when sigma(J) or sigma(B) are large enough, there is no crossover, i.e., the dynamics of the system shows a central-peak behavior and a disordered behavior, respectively.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000238696300058
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5971
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Liu, ZQ,Kong, XM,Chen, XS. Effects of Gaussian disorder on the dynamics of the random transverse Ising model[J]. PHYSICAL REVIEW B,2006,73(22):-.
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