tJ ring with an Anderson impurity: A model for a quantum dot

P. Schlottmann and A. A. Zvyagin
Phys. Rev. B 67, 115113 – Published 19 March 2003
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Abstract

A quantum wire of finite length L with correlated electrons coupled to a quantum dot is studied. The wire is parametrized in terms of the supersymmetric tJ model and the dot is represented by an Anderson-like impurity. The model is integrable and we discuss the properties of the finite chain by solving the Bethe Ansatz equations. For a finite ring the energy spectrum is discrete and has to be obtained numerically. As a function of the coupling of the dot to the wire we discuss the ground state and low-energy excitations, the Aharonov-Bohm oscillations and the discontinuities of the magnetization of the system.

  • Received 19 September 2002

DOI:https://doi.org/10.1103/PhysRevB.67.115113

©2003 American Physical Society

Authors & Affiliations

P. Schlottmann1 and A. A. Zvyagin2,3

  • 1Department of Physics, Florida State University, Tallahassee, Florida 32306
  • 2Max Planck Institut für Chemische Physik fester Stoffe, D-01187 Dresden, Germany
  • 3B. I. Verkin Institute for Low Temperature Physics and Engineering of the NAS of Ukraine, Kharkov, 61164, Ukraine

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Vol. 67, Iss. 11 — 15 March 2003

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