Mott-Hubbard metal-insulator transition in nonbipartite lattices

H. R. Krishnamurthy; C. Jayaprakash; Sanjoy Sarker; Wolfgang Wenzel

doi:10.1103/PhysRevLett.64.950

Mott-Hubbard metal-insulator transition in nonbipartite lattices

H. R. Krishnamurthy, C. Jayaprakash, Sanjoy Sarker, and Wolfgang Wenzel

Phys. Rev. Lett. 64, 950 – Published 19 February 1990

Abstract

We reinterpret the Hubbard model in terms of doubly occupied sites and empty sites with an attractive interaction U whose pairing leads to the Mott-Hubbard transition. We develop a mean-field theory for this pairing which in a triangular lattice at T=0 leads to a first-order transition from a spiral, incommensurate metal to a commensurate insulator at U≃5.27t where a charge gap (≃0.085t) opens up. We also discuss the effect of fluctuations.

Received 14 July 1989

DOI:https://doi.org/10.1103/PhysRevLett.64.950

Authors & Affiliations

H. R. Krishnamurthy, C. Jayaprakash, Sanjoy Sarker, and Wolfgang Wenzel

Joseph Henry Laboratories of Physics, Jadwin Hall, Princeton University, Princeton, New Jersey 08544
Department of Physics, The Ohio State University, Columbus, Ohio 43210
Department of Physics, University of Alabama, Tuscaloosa, Alabama 35486