Strongly interacting holes in Ge/Si nanowires

Franziska Maier, Tobias Meng, and Daniel Loss
Phys. Rev. B 90, 155437 – Published 21 October 2014

Abstract

We consider holes confined to Ge/Si core/shell nanowires subject to strong Rashba spin-orbit interaction and screened Coulomb interaction. Such wires can, for instance, serve as host systems for Majorana bound states. Starting from a microscopic model, we find that the Coulomb interaction strongly influences the properties of experimentally realistic wires. To show this, a Luttinger liquid description is derived based on a renormalization group analysis. This description in turn allows us to calculate the scaling exponents of various correlation functions as a function of the microscopic system parameters. It furthermore permits us to investigate the effect of Coulomb interaction on a small magnetic field, which opens a strongly anisotropic partial gap.

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  • Received 4 August 2014
  • Revised 26 September 2014

DOI:https://doi.org/10.1103/PhysRevB.90.155437

©2014 American Physical Society

Authors & Affiliations

Franziska Maier, Tobias Meng, and Daniel Loss

  • Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland

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Issue

Vol. 90, Iss. 15 — 15 October 2014

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