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Solution of Electric-field-driven Tight-binding Lattice in Contact with Fermion Reservoir by Han, Jong E. is a scholarly article available to read on EtoBox.

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Electrons in tight-binding lattice driven by DC electric field dissipate their energy through on-site fermionic thermostats. Due to the translational invariance in the transport direction, the problem can be block-diagonalized. We solve this time-dependent quadratic problem and demonstrate that the problem has an oscillatory steady-state. The steady-state occupation number shows that the Fermi surface disappears for any damping from the thermostats and any finite electric field. Despite the lack of momentum scattering, the conductivity takes the same form as the semi-classical Ohmic expression from the relaxation-time approximation.

Author

Han, Jong E.

Published

2012

Language

EN