Quantum Mott Transition and Superconductivity

Details Quantum Mott Transition and Superconductivity Quantum Mott Transition and Superconductivity

2004-11-09

arxiv.org/abs/cond-mat/0411217v1

J. Phys. Soc. Jpn. 74 (2005) 859

Physics

Condensed Matter

Superconductivity

8 pages, including 3 figures

Scientific paper

10.1143/JPSJ.74.859

The gas-liquid transition is a first-order transition terminating at a finite-temperature critical point with diverging density fluctuations. Mott transition, a metal-insulator transition driven by Coulomb repulsion between electrons, has been identified with this textbook transition. However, the critical temperature of the Mott transition can be suppressed, resulting in unusual quantum criticality. It accounts for non-Fermi-liquid-like properties, and strongly momentum dependent quasiparticles as in many materials near the Mott insulator. Among all, the mode-coupling theory of the density fluctuations supports d-wave superconductivity at the order of a hundred Kelvin for relevant parameters of the copper oxide superconductors.

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