Gauge field, AharonovBohm flux, and highT_{c} superconductivity
Abstract
In a spin1/2 Heisenberg model with shortrange antiferromagnetic order, a hole making a closed loop on one sublattice is subject to a slowly varying spinquantization axis and picks up a phase equal to half the solid angle subtended by the spin orientation around the loop. The phase can be represented by an AharonovBohm flux resulting in a U(1) gauge theory. For a finite hole density this model leads to superconductivity even in the presence of Coulomb repulsion. The gauge field also enhances lowenergy particlehole excitations, leading to a T^{4/3} law for the normalstate resitivity.
 Publication:

Physical Review Letters
 Pub Date:
 August 1989
 DOI:
 10.1103/PhysRevLett.63.680
 Bibcode:
 1989PhRvL..63..680L
 Keywords:

 Copper Oxides;
 Gauge Theory;
 High Temperature Superconductors;
 Solid Phases;
 Superconductivity;
 Antiferromagnetism;
 Crystal Lattices;
 Holes (Electron Deficiencies);
 Quantum Mechanics;
 SolidState Physics;
 74.65.+n