Effects of Gaussian disorder on the dynamics of the random transverse Ising model
文献类型：期刊论文
| 作者 | Liu, ZQ; Kong, XM; Chen, XS ; Kong, XM , Qufu Normal Univ, Dept Phys, Qufu 273165, Peoples R China
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| 刊名 | PHYSICAL REVIEW B
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| 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 |
| ISSN号 | 1098-0121 |
| 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. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000238696300058 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5971]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Kong, XM , Qufu Normal Univ, Dept Phys, Qufu 273165, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, ZQ,Kong, XM,Chen, XS,et al. Effects of Gaussian disorder on the dynamics of the random transverse Ising model[J]. PHYSICAL REVIEW B,2006,73(22):-. |
| APA | Liu, ZQ,Kong, XM,Chen, XS,&Kong, XM , Qufu Normal Univ, Dept Phys, Qufu 273165, Peoples R China.(2006).Effects of Gaussian disorder on the dynamics of the random transverse Ising model.PHYSICAL REVIEW B,73(22),-. |
| MLA | Liu, ZQ,et al."Effects of Gaussian disorder on the dynamics of the random transverse Ising model".PHYSICAL REVIEW B 73.22(2006):-. |
入库方式： OAI收割
来源：理论物理研究所
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