Conductance oscillations of core-shell nanowires in transversal magnetic fields

Andrei Manolescu, George Alexandru Nemnes, Anna Sitek, Tomas Orn Rosdahl, Sigurdur Ingi Erlingsson, and Vidar Gudmundsson
Phys. Rev. B 93, 205445 – Published 31 May 2016

Abstract

We analyze theoretically electronic transport through a core-shell nanowire in the presence of a transversal magnetic field. We calculate the conductance for a variable coupling between the nanowire and the attached leads and show how the snaking states, which are low-energy states localized along the lines of the vanishing radial component of the magnetic field, manifest their existence. In the strong-coupling regime they induce flux periodic, Aharonov-Bohm-like, conductance oscillations, which, by decreasing the coupling to the leads, evolve into well-resolved peaks. The flux periodic oscillations arise due to interference of the snaking states, which is a consequence of backscattering at either the contacts with leads or magnetic or potential barriers in the wire.

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  • Received 7 January 2016
  • Revised 4 May 2016

DOI:https://doi.org/10.1103/PhysRevB.93.205445

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Andrei Manolescu1,*, George Alexandru Nemnes2,3, Anna Sitek4,5, Tomas Orn Rosdahl6, Sigurdur Ingi Erlingsson1, and Vidar Gudmundsson4

  • 1School of Science and Engineering, Reykjavik University, Menntavegur 1, IS-101 Reykjavik, Iceland
  • 2University of Bucharest, Faculty of Physics, MDEO Research Center, 077125 Magurele-Ilfov, Romania
  • 3Horia Hulubei National Institute for Physics and Nuclear Engineering, 077126 Magurele-Ilfov, Romania
  • 4Science Institute, University of Iceland, Dunhaga 3, IS-107 Reykjavik, Iceland
  • 5Department of Theoretical Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Technology, 50-370 Wroclaw, Poland
  • 6Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands

  • *manoles@ru.is

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Issue

Vol. 93, Iss. 20 — 15 May 2016

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