A Theory for the High-T-c Cuprates: Anomalous Normal-State and Spectroscopic Properties, Phase Diagram, and Pairing

作者：Ashkenazi J^*

来源：Journal of Superconductivity and Novel Magnetism, 2011, 24(4): 1281-1308.

DOI：10.1007/s10948-010-0823-8

• Superconductivity
• Cuprates
• Auxiliary particles
• Anomalies
• Pairing

A theory of highly correlated layered superconducting materials is applied for the cuprates. Differently from an independent-electron approximation, their low-energy excitations are approached in terms of auxiliary particles representing combinations of atomic-like electron configurations, where the introduction of a Lagrange Bose field enables treating them as bosons or fermions. The energy spectrum of this field accounts for the tendency of hole-doped cuprates to form stripe-like inhomogeneities. Consequently, it induces a different analytical behavior for auxiliary particles corresponding to "antinodal" and "nodal" electrons, enabling the existence of different pairing temperatures at T (au) and T (c) . This theory correctly describes the observed phase diagram of the cuprates, including the non-Fermi-liquid to FL crossover in the normal state, the existence of Fermi arcs below T (au) and of a "marginal-FL" critical behavior above it. The qualitative anomalous behavior of numerous physical quantities is accounted for, including kink- and waterfall-like spectral features, the

• 出版日期2011-5