Essert, Sven and Krueckl, Viktor and Richter, Klaus (2015) Two-dimensional topological insulator edge state backscattering by dephasing. PHYSICAL REVIEW B, 92 (20): 205306. ISSN 1098-0121, 1550-235X
Full text not available from this repository.Abstract
To understand the seemingly absent temperature dependence in the conductance of two-dimensional topological insulator edge states, we perform a numerical study which identifies the quantitative influence of the combined effect of dephasing and elastic scattering in charge puddles close to the edges. We show that this mechanism may be responsible for the experimental signatures in HgTe/CdTe quantum wells if the puddles in the samples are large and weakly coupled to the sample edges. We propose experiments on artificial puddles which allow one to verify this hypothesis and to extract the real dephasing time scale using our predictions. In addition, we present a method to include the effect of dephasing in wave-packet-time-evolution algorithms.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HGTE QUANTUM-WELLS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 May 2019 11:57 |
| Last Modified: | 06 May 2019 11:57 |
| URI: | https://pred.uni-regensburg.de/id/eprint/4452 |
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