Influence of Hole Doping on Antiferromagnetic Real-Space Approaches for the High-Tc Cuprates

Дата и время публикации : 1996-03-07T21:41:04Z

Авторы публикации и институты :
Alexander Nazarenko (NHMFL/FSU)
Stephan Haas (NHMFL/FSU)
Jose Riera (NHMFL/FSU)
Adriana Moreo (NHMFL/FSU)
Elbio Dagotto (NHMFL/FSU)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: RevTeX (version 3.0), 5 twocolumn pages with 3 embedded figures, added references
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: Recently proposed scenarios for the cuprates make extensive use of a “flat” quasiparticle (q.p.) dispersion and short-range hole-hole interactions in real-space, both caused by antiferromagnetic (AF) correlations. The density of states (DOS) at half-filling has a robust peak which boosts the superconducting critical temperature $T_c$ to large values as holes are introduced into the (rigid) q.p. band. Here, the stability of such scenarios is studied after a $finite$ but small hole density is introduced. The overall conclusion is that the main features of real-space AF-based approaches remain qualitatively similar, namely a large $T_c$ is found and superconductivity (SC) appears in the ${rm d_{x^2 – y^2}}$ channel. As the hole density grows the chemical potential $mu$ crosses a broad peak in the DOS. We also observe that extended s-wave SC competes with d-wave in the overdoped regime.

Category: Physics