Correlated time-dependent transport through a two-dimensional quantum structure

Vidar Gudmundsson, Chi-Shung Tang, Olafur Jonasson, Valeriu Moldoveanu, and Andrei Manolescu
Phys. Rev. B 81, 205319 – Published 25 May 2010

Abstract

We use a generalized master equation (GME) to describe the nonequilibrium magnetotransport of interacting electrons through a broad finite quantum wire with an embedded ring structure. The finite quantum wire is weakly coupled to two broad leads acting as reservoirs of electrons. The mutual Coulomb interaction of the electrons is described using a configuration interaction method for the many-electron states of the central system. We report some nontrivial interaction effects both at the level of time-dependent filling of states and on the time-dependent transport. We find that the Coulomb interaction in this nontrivial geometry can enhance the correlation of electronic states in the system and facilitate it’s charging in certain circumstances in the weak coupling limit appropriate for the GME. In addition, we find oscillations in the current in the leads due to the correlations oscillations caused by the switched-on lead-system coupling. The oscillations are influenced and can be enhanced by the external magnetic field and the Coulomb interaction.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
8 More
  • Received 8 February 2010

DOI:https://doi.org/10.1103/PhysRevB.81.205319

©2010 American Physical Society

Authors & Affiliations

Vidar Gudmundsson1,2,*, Chi-Shung Tang3,†, Olafur Jonasson1, Valeriu Moldoveanu4, and Andrei Manolescu5

  • 1Science Institute, University of Iceland, Dunhaga 3, IS-107 Reykjavik, Iceland
  • 2Physics Division, National Center for Theoretical Sciences, P.O. Box 2-131, Hsinchu 30013, Taiwan
  • 3Department of Mechanical Engineering, National United University, 1, Lienda, Miaoli 36003, Taiwan
  • 4National Institute of Materials Physics, P.O. Box MG-7, Bucharest-Magurele, Romania
  • 5School of Science and Engineering, Reykjavik University, Kringlan 1, IS-103 Reykjavik, Iceland

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

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 81, Iss. 20 — 15 May 2010

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×