Superconductivity from correlated hopping

Дата и время публикации : 1995-05-10T17:27:09Z

Авторы публикации и институты :
C. D. Batista
F. Lema
A. A. Aligia

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 10 pages, RevTeX 3.0 + 2 PostScript figs. Accepted for publication in Phys.Rev. B
Первичная категория: supr-con

Все категории : supr-con, cond-mat.supr-con

Краткий обзор статьи: We consider a chain described by a next-nearest-neighbor hopping combined with a nearest-neighbor spin flip. In two dimensions this three-body term arises from a mapping of the three-band Hubbard model for CuO$_2$ planes to a generalized $t-J$ model and for large O-O hopping favors resonance-valence-bond superconductivity of predominantly $d$-wave symmetry. Solving the ground state and low-energy excitations by analytical and numerical methods we find that the chain is a Luther-Emery liquid with correlation exponent $K_{rho} = (2-n)^2/2$, where $n$ is the particle density.

Category: Physics