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 |
|---|---|
| Journal | Physica C: Superconductivity and its applications |
| Volume | 470 |
| Issue number | SUPPL.1 |
| DOIs | |
| Publication status | Published - 2010 Dec 1 |
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
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Yokoyama, H., Ogata, M., & Kobayashi, K. (2010). Close relation between antinodal Fermi-surface effect and superconductivity in cuprates. Physica C: Superconductivity and its applications, 470(SUPPL.1). https://doi.org/10.1016/j.physc.2009.10.029