Phase structure of the topological Anderson insulator
文献类型：期刊论文
| 作者 | Xu, D ; Qi, JJ ; Liu, J ; Sacksteder, V ; Xie, XC ; Jiang, H |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2012 |
| 卷号 | 85期号:19 |
| 关键词 | WAVE-FUNCTIONS QUANTUM DIMENSIONS TRANSITION SYSTEMS SURFACE |
| ISSN号 | 1098-0121 |
| 通讯作者 | Xu, D (reprint author), Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA. |
| 中文摘要 | We study the disordered topological Anderson insulator in a two-dimensional (square not strip) geometry. We first report the phase diagram of finite systems and then study the evolution of phase boundaries when the system size is increased to a very large 1120 x 1120 area. We establish that conductance quantization can occur without a bulk band gap, and that there are two distinct scaling regions with quantized conductance: TAI-I with a bulk band gap, and TAI-II with localized bulk states. We show that there is no intervening insulating phase between the bulk conduction phase and the TAI-I and TAI-II scaling regions, and that there is no metallic phase at the transition between the quantized and insulating phases. Centered near the quantized-insulating transition there are very broad peaks in the eigenstate size and fractal dimension d(2); in a large portion of the conductance plateau eigenstates grow when the disorder strength is increased. The fractal dimension at the peak maximum is d(2) approximate to 1.5. Effective-medium theory (Coherent Potential Approximation, self-consistent Born approximation) predicts well the boundaries and interior of the gapped TAI-I scaling region, but fails to predict all boundaries save one of the ungapped TAI-II scaling region. We report conductance distributions near several phase transitions and compare them with critical conductance distributions for well-known models. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/50812]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Xu, D,Qi, JJ,Liu, J,et al. Phase structure of the topological Anderson insulator[J]. PHYSICAL REVIEW B,2012,85(19). |
| APA | Xu, D,Qi, JJ,Liu, J,Sacksteder, V,Xie, XC,&Jiang, H.(2012).Phase structure of the topological Anderson insulator.PHYSICAL REVIEW B,85(19). |
| MLA | Xu, D,et al."Phase structure of the topological Anderson insulator".PHYSICAL REVIEW B 85.19(2012). |
入库方式： OAI收割
来源：物理研究所
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