Breakdown of a Mott insulator -- non-adiabatic tunneling mechanism

Details Breakdown of a Mott insulator -- non-adiabatic tunneling mechanism Breakdown of a Mott insulator -- non-adiabatic tunneling mechanism

2003-04-02

arxiv.org/abs/cond-mat/0304036v2

Phys.Rev.Lett. 91, 066406 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures, version to appear in Phys.Rev.Lett

Scientific paper

10.1103/PhysRevLett.91.066406

Time-dependent nonequilibrium properties of a strongly correlated electron system driven by large electric fields is obtained by means of solving the time-dependent Schr\"odinger equation for the many-body wave function numerically in one dimension. While the insulator-to-metal transition depends on the electric field and the interaction, the metallization is found to be described in terms of a universal Landau-Zener quantum tunneling among the many-body levels. These processes induces current oscillation for small systems, while give rise to finite resistivity through dissipation for larger systems/on longer time scales.

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