Effect of Spin-Orbit Interactions on the 0.7 Anomaly in Quantum Point Contacts

Olga Goulko, Florian Bauer, Jan Heyder, and Jan von Delft
Phys. Rev. Lett. 113, 266402 – Published 24 December 2014
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Abstract

We study how the conductance of a quantum point contact is affected by spin-orbit interactions, for systems at zero temperature both with and without electron-electron interactions. In the presence of spin-orbit coupling, tuning the strength and direction of an external magnetic field can change the dispersion relation and hence the local density of states in the point contact region. This modifies the effect of electron-electron interactions, implying striking changes in the shape of the 0.7-anomaly and introducing additional distinctive features in the first conductance step.

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  • Received 6 August 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.266402

© 2014 American Physical Society

Authors & Affiliations

Olga Goulko1,2, Florian Bauer1, Jan Heyder1, and Jan von Delft1

  • 1Physics Department, Arnold Sommerfeld Center for Theoretical Physics, and Center for NanoScience, Ludwig-Maximilians-Universität, Theresienstraße 37, 80333 Munich, Germany
  • 2Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA

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Issue

Vol. 113, Iss. 26 — 31 December 2014

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