Metallic conduction and superconductivity in the pseudogap phase

Sanjoy K. Sarker

doi:10.1103/PhysRevB.77.052505

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Metallic conduction and superconductivity in the pseudogap phase

Sanjoy K. Sarker

DOI 10.1103/PhysRevB.77.052505 · Physical Review B

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Abstract

A simple theory is developed for the hole-doped antiferromagnet on a square lattice using bosonic spinons and fermionic holons. Spinons form a paired state below a temperature T*, which evolves out of the Mott phase preserving its symmetry. Metallic conduction and d-wave superconductivity result from separate, sublattice-preserving, holon hopping processes. In the metal holons form a spinless Fermi liquid, becoming incoherent (confined) above T*. In the superconductor holons hop as pairs, reducing kinetic energy. At low doping the theory can account for many features of the cuprate superconductors.