Nuclear-spin-induced localization of edge states in two-dimensional topological insulators

Hsu, Chen-Hsuan and Stano, Peter and Klinovaja, Jelena and Loss, Daniel. (2017) Nuclear-spin-induced localization of edge states in two-dimensional topological insulators. Physical Review B, 96 (8). 081405.

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Official URL: https://edoc.unibas.ch/60922/

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We investigate the influence of nuclear spins on the resistance of helical edge states of two-dimensional topological insulators (2DTIs). Via the hyperfine interaction, nuclear spins allow electron backscattering, otherwise forbidden by time-reversal symmetry. We identify two backscattering mechanisms, depending on whether the nuclear spins are ordered or not. Their temperature dependence is distinct but both give resistance, which increases with the edge length, decreasing temperature, and increasing strength of the electron-electron interaction. Overall, we find that the nuclear spins will typically shut down the conductance of the 2DTI edges at zero temperature.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretical Nano/Quantum Physics (Klinovaja)
UniBasel Contributors:Klinovaja, Jelena
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:07 Mar 2018 14:12
Deposited On:07 Mar 2018 14:12

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