Quantum phase transitions in ultrathin films of three-dimensional topological insulators in the presence of an electrostatic potential and a Zeeman field

Huichao Li; L. Sheng; D. Y. Xing

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Quantum phase transitions in ultrathin films of three-dimensional topological insulators in the presence of an electrostatic potential and a Zeeman field

机译：存在静电势和塞曼场的三维拓扑绝缘体超薄膜中的量子相变

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We investigate transport properties of the surface states of three-dimensional topological insulator thin films in the presence of an electrostatic potential γ and a spin-splitting Zeeman field g. It is shown that there exist a quantum pseudospin Hall phase, a quantum anomalous Hall phase, and a common insulator phase in this system. By tuning g and γ, three quantum phase transitions between them can occur accompanied with energy-band closing, each of which is characterized by a change of the quantized pseudospin Chern numbers.

机译：我们研究了在存在静电势γ和自旋分裂塞曼场g的情况下三维拓扑绝缘体薄膜的表面状态的传输特性。结果表明，该系统存在一个量子伪自旋霍尔相，一个量子异常霍尔相和一个公共绝缘体相。通过调节g和γ，它们之间可能发生三个量子相变，伴随着能带闭合，每一个的特征都在于量化的伪自旋Chern数的变化。

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来源
《Physical review》 |2012年第4期|p.045118.1-045118.4|共4页
作者
Huichao Li; L. Sheng; D. Y. Xing;
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作者单位

National Laboratory of Solid State Microstmctures and Department of Physics, Nanjing University, Nanjing 210093, China;

National Laboratory of Solid State Microstmctures and Department of Physics, Nanjing University, Nanjing 210093, China;

National Laboratory of Solid State Microstmctures and Department of Physics, Nanjing University, Nanjing 210093, China;

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正文语种 eng
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quantum hall effects; spin polarized transport; spin-orbit coupling, zeeman and stark splitting, jahn-teller effect; electronic transport phenomena in thin films;

机译：量子霍尔效应自旋极化传输;自旋轨道耦合;塞曼和斯塔克分裂;詹恩-泰勒效应;薄膜中的电子传输现象;

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3. Quantum magnetotransport for the surface states of three-dimensional topological insulators in the presence of a Zeeman field [J] . Tahir M., Schwingenschl?gl U. EPL . 2013,第3期

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机译：拓扑中的量子相变和分数激发绝缘薄膜与塞曼和激子质量

Quantum phase transitions in ultrathin films of three-dimensional topological insulators in the presence of an electrostatic potential and a Zeeman field

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