Nonlinear Seebeck and Peltier Effects in Quantum Point Contacts

Details Nonlinear Seebeck and Peltier Effects in Quantum Point Contacts Nonlinear Seebeck and Peltier Effects in Quantum Point Contacts

2006-10-17

arxiv.org/abs/cond-mat/0610486v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages, 4 figures

Scientific paper

The charge and entropy currents across a quantum point contact is expanded as a series in powers of the applied bias voltage and the temperature difference. After that, the expansions of the Seebeck voltage in temperature difference and the Peltier heat in current are obtained. With a suitable choice of the average temperature and chemical potential, the lowest order nonlinear term in both cases appear to be of third order. The behavior of the third-order coefficients in both cases are then investigated for different contact parameters.

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