Tian, Chushun (2012). Anomalous quantum diffusion and the topological metal. Phys. Rev. B, 86 (12). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1098-0121
Full text not available from this repository.Abstract
Electron wave scattering off disorders provides a key to many fascinating transport phenomena recently observed in topological insulators. Here, we present a nonperturbative diagrammatic theory of this subject. Surprisingly, quantum superdiffusion is found on the surface of three-dimensional strong topological insulators regardless of disorder strength (but not vanishing), where the diffusion coefficient grows in time logarithmically. Such a transport anomaly serves as a main characteristic of the novel quantum metal, the so-called topological metal, and indicates that it is a hybridization of Ohmic and perfect metals. It washes out the Anderson transition occurring in two-dimensional normal metals with disordered spin-orbit coupling, and leads to a logarithmic divergence of the conductance in the sample size instead. Therefore, the present work provides an analytical proof of the transport anomaly discovered numerically [Nomura, Koshino, and Ryu, Phys. Rev. Lett. 99, 146806 (2007); Bardarson et al., ibid. 99, 106801 (2007)].
Item Type: | Journal Article | ||||||||
Creators: |
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URN: | urn:nbn:de:hbz:38-482841 | ||||||||
DOI: | 10.1103/PhysRevB.86.121304 | ||||||||
Journal or Publication Title: | Phys. Rev. B | ||||||||
Volume: | 86 | ||||||||
Number: | 12 | ||||||||
Date: | 2012 | ||||||||
Publisher: | AMER PHYSICAL SOC | ||||||||
Place of Publication: | COLLEGE PK | ||||||||
ISSN: | 1098-0121 | ||||||||
Language: | English | ||||||||
Faculty: | Unspecified | ||||||||
Divisions: | Unspecified | ||||||||
Subjects: | no entry | ||||||||
Uncontrolled Keywords: |
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URI: | http://kups.ub.uni-koeln.de/id/eprint/48284 |
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