Abstract
A strongly correlated Hubbard (t-t′-U) model is studied using a variational Monte Carlo method. The magnitude of momentum distribution function n(k) varies slightly near the nodal quasi-Fermi surface [∼(π/2,π/2)], but varies outstandingly in an antinodal part [near (π,0)], as the value of t′/t varies, which is sensitive to the strength of superconductivity. Furthermore, the behavior of the slope of n(k) around (π,0) coincides well with that of the d-wave superconducting correlation function. It follows the electrons near the antinode play a leading role to control the strength of superconductivity.
Original language | English |
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Pages (from-to) | S149-S150 |
Journal | Physica C: Superconductivity and its applications |
Volume | 470 |
Issue number | SUPPL.1 |
DOIs | |
Publication status | Published - 2010 Dec |
Keywords
- Antinode
- Cuprate
- Fermi surface
- Superconductivity
- Twogap
- Van Hove singularity
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering