Ground-State Decay Rate for the Zener Breakdown in Band and Mott Insulators

Details Ground-State Decay Rate for the Zener Breakdown in Band and Mott Insulators Ground-State Decay Rate for the Zener Breakdown in Band and Mott Insulators

2005-03-19

arxiv.org/abs/cond-mat/0503503v4

Phys. Rev. Lett. 95, 137601 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages 2 figures, revised text, version to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.95.137601

Non-linear transport of electrons in strong electric fields, as typified by dielectric breakdown, is re-formulated in terms of the ground-state decay rate originally studied by Schwinger in non-linear QED. We discuss the effect of electron interaction on Zener tunneling by comparing the dielectric breakdown of the band insulator and the Mott insulator, where the latter is studied by the time-dependent density-matrix renormalization group (DMRG). The relation with the Berry's phase theory of polarization is also established.

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