scholarly journals Two-band Bardeen-Cooper-Schrieffer superconducting state of the iron pnictide compound Ba(Fe0.9Co0.1)2As2

2011 ◽  
Vol 83 (14) ◽  
Author(s):  
E. G. Maksimov ◽  
A. E. Karakozov ◽  
B. P. Gorshunov ◽  
A. S. Prokhorov ◽  
A. A. Voronkov ◽  
...  
Keyword(s):  
Superconducting State ◽  
Iron Pnictide

Direct evidence of uneven dxz and dyz orbital occupation in the superconducting state of iron pnictide

2020 ◽  
Vol 102 (19) ◽  
Author(s):  
Damian Rybicki ◽  
Marcin Sikora ◽  
Joanna Stępień ◽  
Łukasz Gondek ◽  
Kamil Goc ◽  
...  
Keyword(s):  
Superconducting State ◽  
Direct Evidence ◽  
Iron Pnictide ◽  
Orbital Occupation

scholarly journals Nodeless two-gap superconducting state in single crystals of the stoichiometric iron pnictide LiFeAs

2011 ◽  
Vol 83 (10) ◽  
Author(s):  
H. Kim ◽  
M. A. Tanatar ◽  
Yoo Jang Song ◽  
Yong Seung Kwon ◽  
R. Prozorov
Keyword(s):  
Single Crystals ◽  
Superconducting State ◽  
Iron Pnictide

scholarly journals Nematic superconducting state in iron pnictide superconductors

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Jun Li ◽  
Paulo J. Pereira ◽  
Jie Yuan ◽  
Yang-Yang Lv ◽  
Mei-Ping Jiang ◽  
...  
Keyword(s):  
Superconducting State ◽  
Iron Pnictide ◽  
Pnictide Superconductors

Angular-dependent magnetic torque in iron-pnictide BaFe2−xNixAs2

2017 ◽  
Vol 31 (03) ◽  
pp. 1750005
Author(s):  
Wei Zhang ◽  
Huiqian Luo ◽  
Rui Zhang ◽  
Xingye Lu ◽  
Bing Xu ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Superconducting State ◽  
Superconducting Transition Temperature ◽  
Superconducting Transition ◽  
Magnetic Torque ◽  
Iron Pnictide ◽  
Torque Measurements ◽  
Superconducting Vortices ◽  
Pnictide Superconductors ◽  
Superconducting Fluctuations

Angular-dependent torque measurements have been performed on the electron doped iron-pnictide superconductors BaFe[Formula: see text]NixAs2 with series of Ni concentrations. In the superconducting state, an irreversibility, as the evidence for the presence of vortex, is observed between the torque measured with increasing and decreasing angle. Our results in underdoped samples [Formula: see text] show that the irreversible torque signal survives up to a temperature [Formula: see text] well above the superconducting transition temperature [Formula: see text], suggesting the existence of superconducting vortices above [Formula: see text], which is likely to originate from superconducting fluctuations.

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.

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
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