Temperature derivative of the chemical potential and its magnetooscillations in two-dimensional system
arXiv:1504.05613 · doi:10.1134/S0021364015020125
Abstract
We report first thermodynamic measurements of the temperature derivative of chemical potential (dμ/dT) 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 magnetooscillations of dμ/dT. We also present a Lifshits-Kosevitch type theory for the dμ/dT magnetooscillations in 2D systems and compare the theory with experimental data. The magnetic field dependence of the dμ/dT 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.
arXiv comment4 pages, 3 figures
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