Coherent magnetotransport and time-dependent transport through split-gated quantum constrictions

Kristinn Torfason, Chi-Shung Tang, and Vidar Gudmundsson
Phys. Rev. B 80, 195322 – Published 30 November 2009

Abstract

The authors report on modeling of transport spectroscopy in split-gate-controlled quantum constrictions. A mixed momentum-coordinate representation is employed to solve a set of time-dependent Lippmann-Schwinger equations with intricate coupling between the subbands and the sidebands. Our numerical results show that the transport properties are tunable by adjusting the ac-biased split gates and the applied perpendicular magnetic field. We illustrate the Aharonov-Bohm oscillation characteristics in the split-gated systems and the time-modulated quasibound-state features involving intersideband transitions.

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  • Received 30 July 2009

DOI:https://doi.org/10.1103/PhysRevB.80.195322

©2009 American Physical Society

Authors & Affiliations

Kristinn Torfason1, Chi-Shung Tang2,*, and Vidar Gudmundsson1,†

  • 1Science Institute, University of Iceland, Dunhaga 3, IS-107 Reykjavik, Iceland
  • 2Department of Mechanical Engineering, National United University, 1 Lienda, Miaoli 36003, Taiwan

  • *cstang@nuu.edu.tw
  • vidar@raunvis.hi.is

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Issue

Vol. 80, Iss. 19 — 15 November 2009

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