scholarly journals Spin fluctuation renormalizations of normal and superconducting state properties int − J*-model

2010 ◽  
Vol 200 (1) ◽  
pp. 012050
Author(s):  
Valery V Val'kov ◽  
Alexander A Golovnya
Keyword(s):  
Superconducting State ◽  
Spin Fluctuation

Ru NMR and NQR Studies in CeRu2

1996 ◽  
Vol 51 (5-6) ◽  
pp. 793-796 ◽  
Author(s):  
K. Ishida ◽  
H. Mukuda ◽  
Y. Kitaoka ◽  
K. Asayama ◽  
Y. Onuki
Keyword(s):  
Superconducting State ◽  
Spin Fluctuation ◽  
S Wave ◽  
Temperature Range ◽  
Al Substitution ◽  
Exponential Decrease ◽  
Strong Spin

Abstract We have carried out Ru NMR and NQR measurements in superconductor CeRu2 having Tc = 6.1 K in the temperature range of 1.3-30 K. From the 99Ru NMR in 10.2 T above Hc2 , T1T = const was found in the measured-T range, and the value of T1TK2 is almost the same as that in the uncorrelated Korringa relation, suggesting that there does not exist the strong spin fluctuation of Ru d-spins. The property of the superconducting state was investigated by using Ru NQR. We observed the Hebel-Slichter peak just below T c and the exponential decrease in 1/T1 indicating that this superconductivity has an ordinary s-wave character. The effect of Al substitution for Ru was also studied by NMR and NQR.

Observation by HVEM of the martensite transformation and the superconducting transition in Nb3Sn

1988 ◽  
Vol 46 ◽  
pp. 788-789
Author(s):  
M. A. Kirk ◽  
M. C. Baker ◽  
B. J. Kestel ◽  
H. W. Weber
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Superconducting State ◽  
Martensite Transformation ◽  
Sputter Deposition ◽  
Diffusion Reaction ◽  
Solute Diffusion ◽  
Superconducting Transition ◽  
Twin Boundaries ◽  
Martensite Structure

It is well known that a number of compound superconductors with the A15 structure undergo a martensite transformation when cooled to the superconducting state. Nb3Sn is one of those compounds that transforms, at least partially, from a cubic to tetragonal structure near 43 K. To our knowledge this transformation in Nb3Sn has not been studied by TEM. In fact, the only low temperature TEM study of an A15 material, V3Si, was performed by Goringe and Valdre over 20 years ago. They found the martensite structure in some foil areas at temperatures between 11 and 29 K, accompanied by faults that consisted of coherent twin boundaries on {110} planes. In pursuing our studies of irradiation defects in superconductors, we are the first to observe by TEM a similar martensite structure in Nb3Sn.Samples of Nb3Sn suitable for TEM studies have been produced by both a liquid solute diffusion reaction and by sputter deposition of thin films.

Temperature dependence of spin fluctuation scattering of neutrons on pyrrhotite

1964 ◽  
Vol 25 (5) ◽  
pp. 634-641 ◽  
Author(s):  
Sz. Kraśnicki ◽  
A. Wanic ◽  
Ž. Dimitrijević ◽  
R. Maglić ◽  
V. Marković ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Spin Fluctuation

scholarly journals Specific heat of Zn-dopedYBa2Cu3O6.95:Possible evidence for Kondo screening in the superconducting state

2000 ◽  
Vol 61 (5) ◽  
pp. 3604-3609 ◽  
Author(s):  
D. L. Sisson ◽  
S. G. Doettinger ◽  
A. Kapitulnik ◽  
R. Liang ◽  
D. A. Bonn ◽  
...  
Keyword(s):  
Specific Heat ◽  
Superconducting State ◽  
Kondo Screening

scholarly journals Chiral topological superconducting state with Chern number C = −2 in Pb3Bi/Ge(111)

2021 ◽  
Vol 103 (23) ◽  
Author(s):  
Shuwen Sun ◽  
Wei Qin ◽  
Leiqiang Li ◽  
Zhenyu Zhang
Keyword(s):  
Superconducting State ◽  
Chern Number
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