TY - JOUR
T1 - Close relation between antinodal Fermi-surface effect and superconductivity in cuprates
AU - Yokoyama, Hisatoshi
AU - Ogata, Masao
AU - Kobayashi, Kenji
PY - 2010/12
Y1 - 2010/12
N2 - 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.
AB - 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.
KW - Antinode
KW - Cuprate
KW - Fermi surface
KW - Superconductivity
KW - Twogap
KW - Van Hove singularity
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U2 - 10.1016/j.physc.2009.10.029
DO - 10.1016/j.physc.2009.10.029
M3 - Article
AN - SCOPUS:78649705907
SN - 0921-4534
VL - 470
SP - S149-S150
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - SUPPL.1
ER -