The Interplay of Landau Level Broadening and Temperature on Two-Dimensional Electron Systems

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This work investigates the influence of low temperature and broadened Landau levels on the thermodynamic properties of two-dimensional electron systems. The interplay between these two physical parameters on the magnetic field dependence of the chemical potential, the specific heat and the magnetization is calculated. In the absence of a complete theory that explains the Landau level broadening, experimental and theoretical studies in literature perform different model calculations of this parameter. Here it is presented that different broadening parameters of Gaussian-shaped Landau levels cause width variations in their contributions to interlevel and intralevel excitations. Below a characteristic temperature, the interlevel excitations become negligible. Likewise, at this temperature range, the effect of the Landau level broadening vanishes.
5 pages, 5 figures, submitted to Solid State Communications

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Mesoscale and Nanoscale Physics, Other Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/161687

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0804.2546
 http://arxiv.org/abs/0804.2546
 Solid State Communications, 146 (2008) 487-490
 doi:10.1016/j.ssc.2008.03.042

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arXiv