# Lattice Contraction Driven Insulator-Metal Transition in the $d =\infty$ Local Approximation

Majumdar, Pinaki and Krishnamurthy, HR (1994) Lattice Contraction Driven Insulator-Metal Transition in the $d =\infty$ Local Approximation. In: Physical Review Letters, 73 (11). pp. 1525-1528.

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## Abstract

We study the effects of lattice contraction on insulator-metal transitions in strongly correlated systems, in the context of the $d =\infty$, iterated perturbation theory approximation for the half-filled Hubbard model. We compute the phase diagram in the pressure-temperature plane for the paramagnetic metal to paramagnetic insulator transition. We present results for conductivity jumps across the transition and for the variation in conductivity with pressure and temperature in either phase. Our results agree qualitatively with experimental data on transition metal oxides.

Item Type: Journal Article Copyright of this article belongs to American Physical Society. Division of Physical & Mathematical Sciences > Physics 14 Nov 2006 19 Sep 2010 04:31 http://eprints.iisc.ernet.in/id/eprint/8264