scholarly journals Eliashberg Theory of a Multiband Non-Phononic Spin Glass Superconductor

2020 ◽  
Vol 6 (4) ◽  
pp. 51
Author(s):  
Giovanni Alberto Ummarino
Keyword(s):  
Phase Diagram ◽  
Temperature Dependence ◽  
Spin Glass ◽  
Superfluid Density ◽  
S Wave ◽  
Eliashberg Equations ◽  
Complex Phase ◽  
Iron Pnictide ◽  
Eliashberg Theory ◽  
Reentrant Superconductivity

I solved the Eliashberg equations for a multiband non-phononic s± wave spin-glass superconductor, calculating the temperature dependence of the gaps and of superfluid density. Their behaviors were revealed to be unusual: showing non-monotonic temperature dependence and reentrant superconductivity. By considering particular input parameters values that could describe the iron pnictide EuFe2(As1−xPx)2, a rich and complex phase diagram arises, with two different ranges of temperature in which superconductivity appears.

Magnetic phase diagram of the reentrant spin glass system (Fe0.65Ni0.35)1−xMnx

1992 ◽  
Vol 104-107 ◽  
pp. 2069-2071 ◽  
Author(s):  
A. Wulfes ◽  
Ch. Böttger ◽  
J. Hesse ◽  
J. Sievert ◽  
H. Ahlers
Keyword(s):  
Phase Diagram ◽  
Spin Glass ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Glass System ◽  
Reentrant Spin Glass ◽  
Spin Glass System

scholarly journals MAGNETIC PHASE DIAGRAM IN THE FERRIMAGNETIC SPIN GLASS SYSTEM SrCr8Fe4-xGaxO19

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-1119-C8-1120 ◽  
Author(s):  
R. Rodriguez ◽  
X. Obradors ◽  
A. Labarta ◽  
J. Tejada ◽  
M. Pernet ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Spin Glass ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Glass System ◽  
Spin Glass System

Phase diagram of the quantum Ising spin glass in a transverse field

1991 ◽  
Vol 44 (22) ◽  
pp. 12583-12585 ◽  
Author(s):  
K. D. Usadel ◽  
G. Büttner ◽  
T. K. Kopeć
Keyword(s):  
Phase Diagram ◽  
Spin Glass ◽  
Transverse Field ◽  
Ising Spin Glass ◽  
Ising Spin

NANOSCOPIC PHASE SEPARATION AND THE UNIVERSAL TRANSPORT AND MAGNETIC PROPERTIES OF HIGH Tc SUPERCONDUCTORS

1999 ◽  
Vol 13 (29n31) ◽  
pp. 3528-3531
Author(s):  
J. JUNG ◽  
H. YAN ◽  
H. DARHMAOUI ◽  
M. ABDELHADI
Keyword(s):  
Magnetic Properties ◽  
Phase Separation ◽  
Temperature Dependence ◽  
Current Density ◽  
Low Temperatures ◽  
Energy Barrier ◽  
Vortex Motion ◽  
Superfluid Density ◽  
High Tc Superconductors ◽  
High Tc

We have found the correlation between nanoscopic phase separation in the copper-oxygen planes of YBCO and TlBCCO and the transport and magnetic properties of these materials in the a-b planes such as: the temperature dependence of the critical current density Jc( T ), the temperature dependence of the superfluid density ns( T )∝1/λ2( T ) at low temperatures, the temperature dependence of the normalized logarithmic relaxation rate S(T), and the dependence of the effective energy barrier against vortex motion on the current density Ueff( J ). These properties are controlled by the ratio of the amount of an underdoped filamentary phase to that of an optimally doped one.

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