Finite-temperature conductance of strongly interacting quantum wire with a nuclear spin order

Aseev, Pavel P. and Klinovaja, Jelena and Loss, Daniel. (2017) Finite-temperature conductance of strongly interacting quantum wire with a nuclear spin order. Physical Review B, 95 (12). p. 125440.

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We study the temperature dependence of the electrical conductance of a clean strongly interacting quantum wire in the presence of a helical nuclear spin order. The nuclear spin helix opens a temperature-dependent partial gap in the electron spectrum. Using a bosonization framework, we describe the gapped electron modes by sine-Gordon-like kinks. We predict an internal resistivity caused by an Ohmic-like friction these kinks experience via interacting with gapless excitations. As a result, the conductance rises from G = e(2)/ h at temperatures below the critical temperature when nuclear spins are fully polarized to G = 2e(2)/ h at higher temperatures when the order is destroyed, featuring a relatively wide plateau in the intermediate regime. The theoretical results are compared with the experimental data for GaAs quantum wires obtained recently by Scheller et al. [Phys. Rev. Lett. 112, 066801 (2014)].
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 14:43
Deposited On:07 Mar 2018 14:43

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