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Breakdown of a Mott Insulator: A Nonadiabatic Tunneling Mechanism

2003; American Physical Society; Volume: 91; Issue: 6 Linguagem: Inglês

10.1103/physrevlett.91.066406

1092-0145

Takashi Oka, Ryotaro Arita, Hideo Aoki,

Physics of Superconductivity and Magnetism

Time-dependent nonequilibrium properties of a strongly correlated electron system driven by large electric fields is obtained by means of solving the time-dependent Schrödinger 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 induce current oscillation for small systems, while giving rise to finite resistivity through dissipation for larger systems/on longer time scales.