High-Tc Superconductivity via BCS and BEC Unification: A Review

2004/05/04 by M. de Llano
Physics and Astronomy · #cond-mat.supr-con #cond-mat.stat-mech

paper · pdf

published as Book chapter in "Frontiers in Superconductivity Research" Ed. by B.P. Martins (Nova Science Publishers, NY, 2004) pp. 1-52. · Book chapter in "Horizons in Superconductivity Research" (Nova Science Publishers, NY, in press). 31 pages, 13 ps figures

arxiv created 2004/05/04 · arxiv updated 2009/12/01

Abstract

Though commonly unrecognized, a superconducting BCS condensate consists of equal numbers of two-electron (2e) and two-hole (2h) Cooper pairs (CPs). A complete (in the sense that 2h-CPs are not ignored) boson-fermion statistical model, however, is able to depart from this perfect 2e-/2h-CP symmetry and yields robustly higher T_c's without abandoning electron-phonon dynamics. The complete model reduces to all the known statistical theories of superconductors, including the BCS-Bose "crossover" picture but going considerably beyond it.

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