Specific heat of ordered equiatomic InMg, CuPt, and CuAu I below 30 K

1980 ◽  
Vol 58 (2) ◽  
pp. 164-167 ◽  
Author(s):  
Douglas L. Martin
Keyword(s):  
Specific Heat ◽  
Debye Temperature ◽  
Normal State ◽  
Pure Gold ◽  
Two Dimensional ◽  
Superconducting Transition ◽  
Dimensional Effect ◽  
Lattice Specific Heat ◽  
Increasing Temperature

The results of specific heat measurements on ordered In −51.67 at.% Mg are presented. A superconducting transition was seen at about 0.95 K. In the normal state, the lattice specific heat varies in the usual way with temperature, i.e., the Debye temperature initially decreases with increasing temperature. This behavior was also seen in ordered equiatomic CuPt but in ordered equiatomic CuAu I the Debye temperature first goes through a maximum before decreasing to the usual minimum. The structure of all three alloys consists of alternating layers of different mass and it was initially supposed that the CuAu I result was a two-dimensional effect. However, the more recent and normal results on InMg and CuPt make this improbable and it appears that the CuAu I result is related to the behavior of pure gold which is itself anomalous.

ON THE THERMAL EXPANSION OF MgB2 AT NORMAL STATE

2007 ◽  
Vol 21 (01) ◽  
pp. 133-143 ◽  
Author(s):  
J. MEENA DEVI ◽  
K. RAMACHANDRAN
Keyword(s):  
Thermal Expansion ◽  
Low Temperature ◽  
Specific Heat ◽  
Normal State ◽  
Temperature Measurements ◽  
Electronic Contribution ◽  
Superconducting Transition ◽  
Temperature Range ◽  
Lattice Specific Heat

Thermal expansion of MgB 2 at normal state is measured experimentally in the temperature range 300–400 K. Lattice and electronic contribution to the thermal expansion is determined from the Gruneisen relation using electronic and lattice specific heat. This is compared with the low temperature measurements for predicting superconducting transition.

scholarly journals FLUCTUATION CONTRIBUTION TO THE SPECIFIC HEAT IN NON-FERMI MODELS FOR SUPERCONDUCTIVITY

2000 ◽  
Vol 14 (25n27) ◽  
pp. 2988-2993
Author(s):  
I. Tifrea ◽  
I. Grosu ◽  
M. Crisan
Keyword(s):  
Crossover Study ◽  
Specific Heat ◽  
Green’S Function ◽  
Green's Function ◽  
Normal State ◽  
Coherence Length ◽  
Einstein Condensation ◽  
Two Dimensional ◽  
Bose Einstein Condensation ◽  
Bose Einstein

We investigate the fluctuation contribution to the specific heat of a two-dimensional superconductor with a non-Fermi normal state described by a Anderson Green's function [Formula: see text]. The specific heat corrections contain a term proportional to [Formula: see text] and another logarithmic one. We define a coherence length as function of the non-Fermi paramter α, which shows that a crossover study between BCS and Bose-Einstein condensation is possible by varying the non-Fermi parameter α.

Specific Heat Measurements on κ-(Bedt-Ttf)2Cu(Ncs)2

1989 ◽  
Vol 173 ◽  
Author(s):  
R. G. Goodrich ◽  
Jing-Chun Xu
Keyword(s):  
Magnetic Field ◽  
Specific Heat ◽  
Temperature Dependence ◽  
Applied Magnetic Field ◽  
Degrees Of Freedom ◽  
Collective Modes ◽  
Superconducting Transition ◽  
Integral Expression ◽  
Lattice Specific Heat ◽  
Strong Coupling Superconductor

ABSTRACTWe have measured the specific heat of κ-(BEDT-TTF)2Cu(NCS)2 from 4 to 14 K. The superconducting transition at 9.4 K is observed in zero applied magnetic field and in a field of 0.3 T. Both the magnitude of the change in Cp at Tc and the temperature dependence of Cp below Tc indicate a strong coupling superconductor. If the lattice specific heat is assumed to contain contributions due to the eighteen vibrational degrees of freedom, the phonon contribution to the specific heat in our temperature range can be represented by a Debye integral expression with a Debye temperature of 95 K. A model of collective modes suggesting the origin of the eighteen degrees of freedom is presented.

scholarly journals Lattice Specific Heat and Debye Temperature of Al-Li Alloy.

Netsu Bussei ◽  
1999 ◽  
Vol 13 (1) ◽  
pp. 13-16 ◽  
Author(s):  
Toshinobu Soma ◽  
Hiroko Kagaya ◽  
Satoru Nito ◽  
Mayumi Sato
Keyword(s):  
Specific Heat ◽  
Debye Temperature ◽  
Lattice Specific Heat

Prediction of phonon-mediated superconductivity in two-dimensional Mo2B2

2019 ◽  
Vol 7 (9) ◽  
pp. 2589-2595 ◽  
Author(s):  
Luo Yan ◽  
Tao Bo ◽  
Peng-Fei Liu ◽  
Bao-Tian Wang ◽  
Yong-Guang Xiao ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Transition Temperatures ◽  
Superconducting Transition ◽  
Molybdenum Boride

We predict two new molybdenum boride monolayers as phonon-mediated superconductors with superconducting transition temperatures of 3.9 and 0.2 K.

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