Gauge field, Aharonov-Bohm flux, and high-Tc superconductivity
Abstract
In a spin-1/2 Heisenberg model with short-range antiferromagnetic order, a hole making a closed loop on one sublattice is subject to a slowly varying spin-quantization 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 Aharonov-Bohm 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 low-energy particle-hole excitations, leading to a T4/3 law for the normal-state 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;
- Solid-State Physics;
- 74.65.+n