Bulk effects on topological conduction in three-dimensional topological insulators
文献类型：期刊论文
| 作者 | Wu, QS ; Sacksteder, VE |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2014 |
| 卷号 | 90期号:4 |
| ISSN号 | 1098-0121 |
| 通讯作者 | Wu, QS (reprint author), Inst Appl Phys & Computat Math, Beijing 100094, Peoples R China. |
| 中文摘要 | The surface states of a topological insulator in a fine-tuned magnetic field are ideal candidates for realizing a topological metal which is protected against disorder. Its signatures are (i) a conductance plateau in long wires in a finely tuned longitudinal magnetic field and (ii) a conductivity which always increases with sample size, and both are independent of disorder strength. We numerically study how these experimental transport signatures are affected by bulk physics in the interior of the topological insulator sample. We show that both signatures of the topological metal are robust against bulk effects. However the bulk does substantially accelerate the metal's decay in a magnetic field and alter its response to surface disorder. When the disorder strength is tuned to resonance with the bulk band the conductivity follows the predictions of scaling theory, indicating that conduction is diffusive. At other disorder strengths the bulk reduces the effects of surface disorder and scaling theory is systematically violated, signaling that conduction is not fully diffusive. These effects will change the magnitude of the surface conductivity and the magnetoconductivity. |
| 资助信息 | National Science Foundation of China; 973 program of China [2011CBA00108] |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59528]  |
| 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 | Wu, QS,Sacksteder, VE. Bulk effects on topological conduction in three-dimensional topological insulators[J]. PHYSICAL REVIEW B,2014,90(4). |
| APA | Wu, QS,&Sacksteder, VE.(2014).Bulk effects on topological conduction in three-dimensional topological insulators.PHYSICAL REVIEW B,90(4). |
| MLA | Wu, QS,et al."Bulk effects on topological conduction in three-dimensional topological insulators".PHYSICAL REVIEW B 90.4(2014). |
入库方式： OAI收割
来源：物理研究所
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