Zero-modes and thermodynamics of disordered spin-1/2 ladders
文献类型：期刊论文
| 作者 | Tsvelik, AM; Gogolin, AO; Nersesyan, AA; Yu, L ; Gogolin, AO , Univ London Imperial Coll Sci Technol & Med, Dept Math, 180 Queens Gate, London SW7 2BZ, England.
|
| 刊名 | NUCLEAR PHYSICS B
 |
| 出版日期 | 1999 |
| 卷号 | 540期号:3页码:705-730 |
| 关键词 | Low-temperature Properties Nonmagnetic Impurities Field-theory Chains Liquid Gap Superconductivity Supersymmetry Srcu2o3 Systems |
| ISSN号 | 0550-3213 |
| 英文摘要 | The influence of non-magnetic doping on the thermodynamic properties of two-leg S = 1/2 spin ladders is studied in this paper. It is shown that, for a weak interchain coupling, the problem can be mapped onto a model of random mass Dirac (Majorana) fermions. We investigate in detail the structure of the fermionic states localized at an individual mass kink (zero-modes) in the framework of a generalized Dirac model. The low-temperature thermodynamic properties are dominated by these zero-modes. We use the single-fermion density of states, known to exhibit the Dyson singularity in the zero-energy limit, to construct the thermodynamics of the spin ladder, In particular, we find that the magnetic susceptibility chi diverges at T --> 0 as 1/Tln(2)(1/T), and the specific heat behaves as C proportional to 1/ln(3)(1/T). The predictions on magnetic susceptibility are consistent with the most recent results of quantum Monte Carlo simulations on doped ladders with randomly distributed impurities. We also calculate the average staggered magnetic susceptibility induced in the system by such defects. (C) 1999 Elsevier Science B.V. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000078676900007 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/13183]  |
| 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 | Gogolin, AO , Univ London Imperial Coll Sci Technol & Med, Dept Math, 180 Queens Gate, London SW7 2BZ, England. |
| 推荐引用方式 GB/T 7714 | Tsvelik, AM,Gogolin, AO,Nersesyan, AA,et al. Zero-modes and thermodynamics of disordered spin-1/2 ladders[J]. NUCLEAR PHYSICS B,1999,540(3):705-730. |
| APA | Tsvelik, AM,Gogolin, AO,Nersesyan, AA,Yu, L,&Gogolin, AO , Univ London Imperial Coll Sci Technol & Med, Dept Math, 180 Queens Gate, London SW7 2BZ, England..(1999).Zero-modes and thermodynamics of disordered spin-1/2 ladders.NUCLEAR PHYSICS B,540(3),705-730. |
| MLA | Tsvelik, AM,et al."Zero-modes and thermodynamics of disordered spin-1/2 ladders".NUCLEAR PHYSICS B 540.3(1999):705-730. |
入库方式： OAI收割
来源：理论物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。