Low-temperature properties of superconducting materials on sublattice structures

K. G. Ziegler; G. Forgacs; H. Orland

doi:10.1103/PhysRevB.39.4736

← Back to search

Low-temperature properties of superconducting materials on sublattice structures

K. G. Ziegler, G. Forgacs, H. Orland

DOI 10.1103/PhysRevB.39.4736 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

A lattice model for Cooper pairing and magnetic ordering is investigated at T=0 in a mean-field approach. The two-dimensional lattice consists of two different sorts of atoms which form regular sublattices. We find that there is a gapless Cooper-pairing phase if one sublattice has a repulsive and the other sublattice an attractive electron-electron interaction. On the other hand, there is an antiferromagnetic phase with a gap if the interaction is only repulsive. Furthermore, we do not find coexistence of Cooper pairing and magnetic ordering at T=0.