Effective-Field Theory for Model High-Tc Cuprates
A. S. Moskvin, Yu. D. Panov
Abstract
Starting with a minimal model for the CuO2 planes with the on-site Hilbert space reduced to only three effective valence centers [CuO4]7−,6−,5− (nominally Cu1+,2+,3+) with different conventional spin and different orbital symmetry, we propose a unified non-BCS model that allows one to describe the main features of the phase diagrams of doped cuprates within the framework of a simple effective field theory. Unconventional bosonic superconducting phase related with a two-particle quantum transport is shown to compete with antiferromagnetic insulating phase, charge order, and metallic Fermi liquid via phase separation regime.
Topics & Concepts
Condensed matter physicsSuperconductivityCuprateAntiferromagnetismValence (chemistry)Phase diagramPhysicsValence bond theorySymmetry (geometry)Fermi liquid theoryCharge (physics)Hilbert spacePhase (matter)Quantum mechanicsMathematicsAtomic orbitalElectronGeometryPhysics of Superconductivity and MagnetismAdvanced Condensed Matter PhysicsMagnetic and transport properties of perovskites and related materials