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JETP Letters

, Volume 101, Issue 2, pp 125–129 | Cite as

Temperature derivative of the chemical potential and its magneto-oscillations in a two-dimensional system

  • Y. Tupikov
  • A. Yu. Kuntsevich
  • V. M. Pudalov
  • I. S. Burmistrov
Article

Abstract

We report the first thermodynamic measurements of the temperature derivative of chemical potential (∂μ/∂T) in two-dimensional (2D) electron systems. In order to test the technique, we have chosen Schottky gated GaAs/AlGaAs heterojunctions and detected experimentally in this 2D system quantum magneto-oscillations of ∂μ/∂T. We also present a Lifshits-Kosevitch type theory for the ∂μ/∂T magneto-oscillations in 2D systems and compare the theory with experimental data. The magnetic field dependence of the ∂μ/∂T value appears to be sensitive to the density of states shape of Landau levels. The data in low magnetic field domain demonstrate brilliant agreement with theory for non-interacting Fermi gas with Lorentzian Landau level shape.

Keywords

GaAs Fermi Energy JETP Letter Landau Level Temperature Derivative 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Inc. 2015

Authors and Affiliations

  • Y. Tupikov
    • 1
    • 3
  • A. Yu. Kuntsevich
    • 1
    • 2
  • V. M. Pudalov
    • 1
    • 2
  • I. S. Burmistrov
    • 4
    • 2
  1. 1.Lebedev Physical InstituteRussian Academy of SciencesMoscowRussia
  2. 2.Moscow Institute of Physics and Technology (State University)Dolgoprudnyi, Moscow regionRussia
  3. 3.Department of PhysicsPennsylvania State UniversityUniversity ParkUSA
  4. 4.Landau Institute for Theoretical PhysicsRussian Academy of SciencesMoscowRussia

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