First order metal-insulator transision in band overlap mechanism

Details First order metal-insulator transision in band overlap mechanism First order metal-insulator transision in band overlap mechanism

2008-09-23

arxiv.org/abs/0809.3851v1

Physics

Condensed Matter

Materials Science

Scientific paper

We present a method to analyze the metal-insulator transition (MIT) due to the band overlap mechanism. It is based on a model with the knowledge of the homogeneous electron gas, combined with results based on the quasiparticle self-consistent $GW$ method. Because of the long-range nature of the Coulomb interaction, the MIT occurs as the first-order phase transition, that is, the band gap becomes negative (band overlap) suddenly at some critical lattice constant.

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