Low temperature resonances in the electron heat capacity of finite systems

N.K. Kuzmenko and V.M. Mikhajlov

Physica A: Statistical Mechanics and its Applications, 2010, vol. 389, issue 12, 2376-2389

Abstract: Temperature variations of the heat capacity (C) are studied in a low temperature regime T<δF∼εF/N for 2D and 3D systems with N∼102–104 treated as a canonical ensemble of N-noninteracting fermions. The analysis of C is performed by introducing the function φ(ε), the spectral distribution of C, that gives the contribution of each single-particle state to C. This function has two peaks divided by the energy interval Δε≈(2–5)T. If at some temperature Tres a resonance takes place i.e. the positions of these peaks coincide with energies of two levels nearest to εF then C vs T can show a local maximum at Tres. This gives us the possibility to assess the single-particle level spacings near the Fermi level.

Keywords: Fermion canonical heat capacity; Low temperature resonances (search for similar items in EconPapers)
Date: 2010
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:389:y:2010:i:12:p:2376-2389

DOI: 10.1016/j.physa.2009.12.070

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