Crossover Induced Electron Pairing and Superconductivity by Kinetic Renormalization in Correlated Electron Systems

We investigate the ground state of strongly correlated electron systems based on an optimization variational Monte Carlo method to clarify the mechanism of high-temperature superconductivity. The wave function is optimized by introducing variational parameters in an exponential-type wave function be...

Full description

Saved in:
Bibliographic Details
Published in:Condensed matter 2018-09, Vol.3 (3), p.26
Main Authors: Yanagisawa, Takashi, Miyazaki, Mitake, Yamaji, Kunihiko
Format: Article
Language:English
Subjects:
Copper
Correlation
Critical phenomena
Crossovers
Electrons
high-temperature superconductivity
Hubbard model
kinetic mechanism of superconductivity
mechanism of superconductivity
Monte Carlo simulation
optimization variational Monte Carlo method
Physics
strongly correlated electron systems
Superconductivity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigate the ground state of strongly correlated electron systems based on an optimization variational Monte Carlo method to clarify the mechanism of high-temperature superconductivity. The wave function is optimized by introducing variational parameters in an exponential-type wave function beyond the Gutzwiller function. The many-body effect plays an important role as an origin of superconductivity in a correlated electron system. There is a crossover between weakly correlated region and strongly correlated region, where two regions are characterized by the strength of the on-site Coulomb interaction U. We insist that high-temperature superconductivity occurs in the strongly correlated region.
ISSN:2410-3896
2410-3896
DOI:10.3390/condmat3030026