Exchange interaction effects in the thermodynamic properties of quantum dots

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We study electron-electron interaction effects in the thermodynamic properties of quantum-dot systems. We obtain the direct and exchange contributions to the specific heat C_v in the self-consistent Hartree-Fock approximation at finite temperatures. An exchange-induced phase transition is observed and the transition temperature is shown to be inversely proportional to the size of the system. The exchange contribution to C_v dominates over the direct and kinetic contributions in the intermediate regime of interaction strength (r_s ~ 1). Furthermore, the electron-electron interaction modifies both the amplitude and the period of magnetic field induced oscillations in C_v.
4 pages, 4 figures; To appear in Phys. Rev. B

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/217009

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0412542
 http://arxiv.org/abs/cond-mat/0412542
 Phys. Rev. B 71 113302 (2005).
 doi:10.1103/PhysRevB.71.113302

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