On Gossamer Metals and Insulating Behavior

Details On Gossamer Metals and Insulating Behavior On Gossamer Metals and Insulating Behavior

2003-09-12

arxiv.org/abs/cond-mat/0309297v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages

Scientific paper

We extend the Gossamer technique recently proposed to describe superconducting ground states to metallic ground states. The gossamer metal in a single band model will describe a metallic phase that becomes arbitrarily hard to differentiate from an insulator as one turns the Coulomb correlations up. We were motivated by the phase diagram of V$_2$O$_3$ and f-electron systems which have phase diagrams in which a line of first order metal-insulator transition ends at a critical point above which the two phases are indistinguishable. This means that one can go continuously from the metal to the ``insulator'', suggesting that they might be the same phase.

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