• About
  • Policies
  • What is open access
  • Library
  • Contact
Advanced search
      View Item 
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Science
      • Department of Physics
      • View Item
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Science
      • Department of Physics
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Local current distribution at large quantum dots (QDs): A self-consistent screening model

      Thumbnail
      View / Download
      441.0 Kb
      Author(s)
      Krishna, P. M.
      Siddiki, A.
      Güven, K.
      Hakioǧlu T.
      Date
      2008
      Source Title
      Physica E : Low-Dimensional Systems and Nanostructures
      Print ISSN
      1386-9477
      Publisher
      Elsevier B.V.
      Volume
      40
      Issue
      5
      Pages
      1142 - 1144
      Language
      English
      Type
      Article
      Item Usage Stats
      181
      views
      151
      downloads
      Abstract
      We report the implementation of the self-consistent Thomas-Fermi screening theory, together with the local Ohm's law to a quantum dot system in order to obtain local current distribution within the dot and at the leads. We consider a large dot (size > 700 nm) defined by split gates, and coupled to the leads. Numerical calculations show that the non-dissipative current is confined to the incompressible strips. Due to the non-linear screening properties of the 2DES at low temperatures, this distribution is highly sensitive to external magnetic field. Our findings support the phenomenological models provided by the experimental studies so far, where the formation of the (direct) edge channels dominate the transport.
      Keywords
      Edge states
      Quantum dots
      Quantum hall effect
      Screening
      Computation theory
      Fermi level
      Hall effect
      Magnetic fields
      Numerical methods
      Edge states
      Local current distribution
      Thomas-Fermi screening theory
      Semiconductor quantum dots
      Permalink
      http://hdl.handle.net/11693/23196
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.physe.2007.08.055
      Collections
      • Department of Physics 2484
      • Institute of Materials Science and Nanotechnology (UNAM) 2098
      Show full item record

      Browse

      All of BUIRCommunities & CollectionsTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsCoursesThis CollectionTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsCourses

      My Account

      Login

      Statistics

      View Usage StatisticsView Google Analytics Statistics

      Bilkent University

      If you have trouble accessing this page and need to request an alternate format, contact the site administrator. Phone: (312) 290 2976
      © Bilkent University - Library IT

      Contact Us | Send Feedback | Off-Campus Access | Admin | Privacy