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arXiv · 1611.10238

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

Pavel Aseev·Jelena Klinovaja·Daniel Loss
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Abstract

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)].

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Pavel Aseev, Jelena Klinovaja, Daniel Loss. 2017-02-28. Finite-temperature conductance of strongly interacting quantum wire with a nuclear spin order. https://doi.org/10.1103/physrevb.95.125440

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