scholarly journals Sulfur hydride and superconductivity theory

Physics Today ◽  
2017 ◽  
Vol 70 (7) ◽  
pp. 14-14 ◽  
Author(s):  
D. George Walmsley ◽  
Xue-Heng Zheng
Keyword(s):  
Superconductivity Theory

High-Temperature Superconductivity Theory

Science ◽  
1991 ◽  
Vol 251 (4997) ◽  
pp. 1005-1006 ◽  
Author(s):  
P. W. ANDERSON ◽  
E. ABRAHAMS ◽  
R. LAUGHLIN
Keyword(s):  
High Temperature ◽  
High Temperature Superconductivity ◽  
Superconductivity Theory

Two-band superconductivity theory beyond the Migdal theorem

2006 ◽  
Vol 149 (1) ◽  
pp. 1393-1406 ◽  
Author(s):  
M. E. Palistrant ◽  
V. A. Ursu
Keyword(s):  
Superconductivity Theory

GORKOV'S ANSATZ IN SUPERCONDUCTIVITY THEORY

1965 ◽  
Vol 43 (12) ◽  
pp. 2142-2149 ◽  
Author(s):  
A. J. Coleman ◽  
S. Pruski
Keyword(s):  
Density Matrix ◽  
Green’S Function ◽  
Green's Function ◽  
Order Parameter ◽  
Green’S Functions ◽  
Second Order ◽  
Bcs Theory ◽  
Initial Value ◽  
Ginzburg Landau ◽  
Superconductivity Theory

By means of Green's functions methods, Gorkov derived the BCS theory on the basis of the Ansatz that the correlation part of the second-order Green's function could be factored in the form χχ* where χ is a two-particle function closely related to the Ginzburg–Landau order-parameter. Since the density matrix is an initial value of a Green's function, Gorkov's Ansatz is equivalent to an assumption about the 2-matrix. The present paper considers circumstances in which the Gorkov Ansatz is exactly satisfied by a system of a definite number of fermions.

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