Insulator-Metal Transition in One Dimension Induced by Long-Range Electronic Interactions

Abstract

The effects of a long range electronic potential on a one dimensional commensurate Charge Density Wave (CDW) state are investigated. Using numerical techniques it is shown that a transition to a metallic ground state is reached as the range of the electron-electron repulsion increases. In this metallic state, the optical conductivity exhibits a large Drude weight. Possible interpretations of our results are discussed.

5 pages, Revtex, minor misprints corrected and a reference to earlier work by V. Emery and C. Noguera added

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