scholarly journals Microscopic theory of high-temperature superconductivity in strongly correlated electronic systems

2020 ◽  
Vol 23 (4) ◽  
pp. 43701
Author(s):  
Plakida
Keyword(s):  
High Temperature ◽  
High Temperature Superconductivity ◽  
Microscopic Theory ◽  
Electronic Systems ◽  
Strongly Correlated ◽  
Strongly Correlated Electronic Systems

scholarly journals GAUSSIAN EFFECTIVE POTENTIAL AND ANTIFERROMAGNETISM IN THE HUBBARD MODEL

2012 ◽  
Vol 26 (20) ◽  
pp. 1250130 ◽  
Author(s):  
L. MAROTTA ◽  
F. SIRINGO
Keyword(s):  
Hubbard Model ◽  
Effective Potential ◽  
Square Lattice ◽  
Antiferromagnetic Order ◽  
Strong Coupling Regime ◽  
Electronic Systems ◽  
Strongly Correlated ◽  
Magnetic Systems ◽  
Strongly Correlated Electronic Systems ◽  
Gaussian Effective Potential

The Gaussian Effective Potential (GEP) is shown to be a useful variational tool for the study of the magnetic properties of strongly correlated electronic systems. The GEP is derived for a single band Hubbard model on a two-dimensional bi-partite square lattice in the strong coupling regime. At half-filling the antiferromagnetic order parameter emerges as the minimum of the effective potential with an accuracy which improves over RPA calculations and is very close to that achieved by Monte Carlo simulations. Extensions to other magnetic systems are discussed.

ON THE GAUGE THEORY OF THE RESONATING VALENCE BOND STATES

1988 ◽  
Vol 02 (11n12) ◽  
pp. 1211-1216 ◽  
Author(s):  
G. BASKARAN ◽  
R. SHANKAR
Keyword(s):  
Gauge Theory ◽  
Valence Bond ◽  
Electronic Systems ◽  
Theory Approach ◽  
Strongly Correlated ◽  
Strongly Correlated Electronic Systems ◽  
Bond State ◽  
Local Gauge Symmetry ◽  
Resonating Valence Bond ◽  
Basic Concepts

In this brief report we review some of the basic concepts involved in the gauge theory approach to the Resonating Valence Bond State of strongly correlated electronic systems. Some general consequences of the local gauge symmetry on the nature of excitations are also discussed.

RELATION BETWEEN SPIN AND PSEUDOSPIN IN STRONGLY CORRELATED ELECTRONIC SYSTEMS

1999 ◽  
Vol 13 (05n06) ◽  
pp. 749-753
Author(s):  
O. P. SUSHKOV
Keyword(s):  
Copper Oxide ◽  
Green's Functions ◽  
Green’S Functions ◽  
Dyson Equation ◽  
Electronic Systems ◽  
Strongly Correlated ◽  
Single Hole ◽  
Strongly Correlated Electronic Systems

Dyson equation which relates the single hole Green's functions for a given pseudospin and given spin is derived for t-J model. This equation is applied to explain the experimental spectra for angle resolved photoemission in insulating Copper Oxide.

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