Temperature derivative of the chemical potential and its magnetooscillations in two-dimensional system

Autor:	Tupikov, Y., Kuntsevich, A. Yu., Pudalov, V. M., Burmistrov, I. S.
Rok vydání:	2015
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Disordered Systems and Neural Networks
Zdroj:	JETP Letters 101, 125-129 (2015); Pis'ma v ZhETF 101, 131-135 (2015)
Druh dokumentu:	Working Paper
DOI:	10.1134/S0021364015020125
Popis:	We report first thermodynamic measurements of the temperature derivative of chemical potential (d{\mu}/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 d{\mu}/dT. We also present a Lifshits-Kosevitch type theory for the d{\mu}/dT magnetooscillations in 2D systems and compare the theory with experimental data. The magnetic field dependence of the d{\mu}/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. Comment: 4 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1504.05613 Zobrazit plný text záznamu View this record from Arxiv