Large-n limit of the Heisenberg-Hubbard model: Implications for high-Tc superconductors
Abstract
The Heisenberg-Hubbard model is solved in the large-n limit to gain insight into its relevance to the coppper-oxide materials. A gapless disordered ground state is found for the Heisenberg model. Electronically induced orthorhombic-tetragonal symmetry breaking is observed as a function of doping, with the greatest tendency towards superconductivity occurring in the orthorhombic phase.
- Publication:
-
Physical Review B
- Pub Date:
- March 1988
- DOI:
- 10.1103/PhysRevB.37.3774
- Bibcode:
- 1988PhRvB..37.3774A
- Keywords:
-
- 74.20.-z;
- 75.10.Jm;
- 74.70.Vy;
- Theories and models of superconducting state;
- Quantized spin models