scholarly journals Phase-controlled proximity effect in ferromagnetic Josephson junctions: Calculation of the density of states and the electronic specific heat

2010 ◽  
Vol 82 (1) ◽  
Author(s):  
Mohammad Alidoust ◽  
Gholamreza Rashedi ◽  
Jacob Linder ◽  
Asle Sudbø
Keyword(s):  
Specific Heat ◽  
Density Of States ◽  
Proximity Effect ◽  
Josephson Junctions ◽  
Electronic Specific Heat

scholarly journals On the electronic specific heat in dilute alloys

1978 ◽  
Vol 56 (2) ◽  
pp. 288-291 ◽  
Author(s):  
L. Larose ◽  
F. W. Kus ◽  
J. P. Carbotte
Keyword(s):  
Specific Heat ◽  
Density Of States ◽  
Pure Metal ◽  
Electronic Specific Heat ◽  
Density Of State ◽  
Mass Renormalization ◽  
Dilute Alloys ◽  
State Changes

The coefficient γ of the electronic specific heat is calculated accounting, on the same footing, for the change in the band density of states and the change in the electron–phonon mass renormalization that occurs when small amounts of impurities are added to a pure metal. For alkali alloys it is found that the changes in the mass renormalization are more important than density of state changes.

Low temperature specific heats of zinc alloyed with silver

1975 ◽  
Vol 343 (1634) ◽  
pp. 363-374 ◽  
Keyword(s):  
Low Temperature ◽  
Fermi Level ◽  
Specific Heat ◽  
Debye Temperature ◽  
Density Of States ◽  
Electronic Specific Heat ◽  
Pure Zinc ◽  
Specific Heats ◽  
Complete Breakdown ◽  
Specific Heat Coefficient

Measurements of the electronic specific heat coefficient and of the limiting Debye temperature are reported for pure zinc and for two n-phase alloys containing 2 at. % and 4 at. % silver in zinc, respectively. After a correction for electron-phonon enhancement the electronic specific heat coefficient for pure zinc differs by only a small percentage from the calculated value reported in the literature on the basis of a band calculation. The results for the alloys show a decreasing trend of the density of states at the Fermi level when silver is added to zinc. This is contrary to a prediction based on a rigid band approach. Hence, the results indicate a complete breakdown of the rigid band condition on alloying. The reasons for this are most likely associated with the influence of the d band electrons or with charge distribution effects between solute and solvent atoms.

scholarly journals Phase-dependent electronic specific heat of mesoscopic Josephson junctions

2008 ◽  
Vol 78 (1) ◽  
Author(s):  
Hassan Rabani ◽  
Fabio Taddei ◽  
Olivier Bourgeois ◽  
Rosario Fazio ◽  
Francesco Giazotto
Keyword(s):  
Specific Heat ◽  
Josephson Junctions ◽  
Electronic Specific Heat

Excess Low Temperature Specific Heat and Related Phonon Density of States in a Modulated Incommensurate Dielectric

1996 ◽  
Vol 76 (13) ◽  
pp. 2334-2337 ◽  
Author(s):  
J. Etrillard ◽  
J. C. Lasjaunias ◽  
K. Biljakovic ◽  
B. Toudic ◽  
G. Coddens
Keyword(s):  
Low Temperature ◽  
Specific Heat ◽  
Density Of States ◽  
Phonon Density ◽  
Phonon Density Of States ◽  
Low Temperature Specific Heat

Specific heat below 3 °K of a gold–zinc and a gold–indium alloy

1969 ◽  
Vol 47 (10) ◽  
pp. 1077-1081 ◽  
Author(s):  
Douglas L. Martin
Keyword(s):  
Specific Heat ◽  
Face Centered Cubic ◽  
Electronic Specific Heat ◽  
Confidence Limits ◽  
Electric Field Gradients ◽  
Field Gradients ◽  
Atomic Silver ◽  
Face Centered ◽  
Specific Heat Coefficient ◽  
Limiting Value

Face-centered-cubic alloys of gold with 10 atomic % zinc (divalent) and 10 atomic % indium (trivalent), respectively, were measured in the range 0.4 to 3.0 °K. The coefficients of the nuclear specific-heat term were 1.80 ± 0.07 μcal °K/g atom for AuZn and 1.29 ± 0.06 μcal °K/g atom for AuIn (95% confidence limits). For a gold–10 atomic % silver (monovalent) alloy (Martin 1968) the nuclear term was 0.44 μcal °K/g atom. These results show that electric field gradients in alloys are not simply proportional to the valence difference of the components, a conclusion which may be drawn from NMR results. For the AuZn alloy the electronic specific-heat coefficient (γ) is 153.4 ± 0.7 μcal/°K2 g atom and the limiting value of the Debye temperature (θ0c) is 177.0 ± 0.5 °K. For the AuIn alloy γ is 185.9 ± 0.7 μcal/°K2 g atom and θ0c is 159.1 ± 0.3 °K.

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