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Phys. Rev. B 56, R1645–R1649 (1997)

Insulator-metal transition in one dimension induced by long-range electronic interactions

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D. Poilblanc
Laboratoire de Physique Quantique & Unité Mixte de Recherche 5626, C.N.R.S., Université Paul Sabatier, 31062 Toulouse, France

S. Yunoki
Department of Physics and NHMFL, Florida State University, Tallahassee, Florida 32306

S. Maekawa
Institute for Materials Research, Tohoku University, Sendai 980-77, Japan

E. Dagotto
Department of Physics and NHMFL, Florida State University, Tallahassee, Florida 32306

Received 21 April 1997; published in the issue dated 15 July 1997

The effects of a long-range electronic potential on a one-dimensional commensurate charge-density-wave 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.

© 1997 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.56.R1645
DOI:
10.1103/PhysRevB.56.R1645
PACS:
71.55.-i, 71.27.+a, 74.72.-h