Effects of Pauli paramagnetism on superconducting fluctuations

1971 ◽  
Vol 246 (1) ◽  
pp. 71-83 ◽  
Author(s):  
Koya Aoi
Keyword(s):  
Pauli Paramagnetism ◽  
Superconducting Fluctuations

Effect of superconducting fluctuations on63Cu NQR-NMR relaxation in YBa2Cu3O7

1997 ◽  
Vol 19 (8-9) ◽  
pp. 1131-1136 ◽  
Author(s):  
P. Carretta ◽  
A. Rigamonti ◽  
D. V. Livanov ◽  
A. A. Varlamov
Keyword(s):  
Nmr Relaxation ◽  
Superconducting Fluctuations

The Ternary Rare Earth Chromium Nitrides Ce2CrN3 and Ln3Cr10−xN11 with Ln = La, Ce, Pr

1995 ◽  
Vol 50 (6) ◽  
pp. 905-912 ◽  
Author(s):  
Sascha Broil ◽  
Wolfgang Jeitschko
Keyword(s):  
Rare Earth ◽  
Single Crystal ◽  
Chromium Nitrides ◽  
First Approximation ◽  
Structure Factors ◽  
Square Planar ◽  
Pauli Paramagnetism ◽  
Cubic Structure ◽  
Cold Pressed ◽  
N Flux

The title compounds have been prepared by annealing cold-pressed pellets of the binary nitrides LnN and CrN. Well developed crystals were obtained by recrystallization of the binary or prereacted ternary nitrides in a Li3N flux. Their structures were determined from single-crystal diffractometer data. C e2CrN3 has a U2CrN3 type structure: Immm , a = 379.0(1), b = 340.4(1), c = 1251.7(2) pm, Z = 2, R = 0.012 for 383 structure factors and 16 variables. The atomic positions of this structure are similar to those of U2IrC2 and K2NiF4. The structure may be rationalized to a first approximation with the formula (Ce+4)2[CrN3]8−. The chromium atoms are in a distorted square-planar nitrogen coordination. The CrN4-squares are linked via corner-sharing nitrogen atoms, thus forming infinite, straight - N - CrN2- N - CrN2- chains. The cubic structure of La3Cr10−xN11 (a = 1298.2(1) pm ), Ce3Cr10−xN11 (with a small homogenity range; a = 1284.3(1)-1286.1(3) pm ), and Pr3Cr10−xN11 (a = 1289.1(2) pm ) was determined for the lanthanum compound: Fm 3̄ m , Z = 8, R = 0.027 for 189 F values and 18 variables. One chromium site was found to have an occupancy of only 80.9(5)% resulting in the composition La3Cr9.24(1)N11. The nitrogen atoms occupy four atomic sites. Three of these have octahedral environments (6 La, 3 La + 3 Cr, 2 La + 4 Cr), the fourth one is surrounded by eight chromium atoms forming a cube. The chromium atoms are tetrahedrally coordinated by nitrogen atoms, and these CrN4-tetrahedra are linked via common corners and edges to form a three-dimensionally infinite polyanionic network. In addition the chromium atoms with oxidation numbers of about 2 to 3 form numerous Cr - Cr bonds, which allow to rationalize the Pauli paramagnetism of the compound.

scholarly journals Superconducting fluctuations in a thin NbN film probed by the Hall effect

2017 ◽  
Vol 95 (22) ◽  
Author(s):  
Daniel Destraz ◽  
Konstantin Ilin ◽  
Michael Siegel ◽  
Andreas Schilling ◽  
Johan Chang
Keyword(s):  
Hall Effect ◽  
Superconducting Fluctuations

Superconducting fluctuations in cuprates from the Nernst effect

2004 ◽  
Vol 408-410 ◽  
pp. 709-710
Author(s):  
H. Balci ◽  
C.P. Hill ◽  
M.M. Qazilbash ◽  
R.L. Greene
Keyword(s):  
Nernst Effect ◽  
Superconducting Fluctuations

scholarly journals ON THE INTERPRETATION OF THE NERNST EFFECT MEASUREMENTS IN THE CUPRATES

2004 ◽  
Vol 18 (25) ◽  
pp. 3315-3326 ◽  
Author(s):  
IDDO USSISHKIN ◽  
S. L. SONDHI
Keyword(s):  
Full Range ◽  
Nernst Effect ◽  
Superconducting Fluctuations ◽  
Quantitative Calculations

We consider the large Nernst signal discovered by Ong and collaborators in hole-doped cuprates, in particular in the pseudogap regime. Based on our previous quantitative calculations together with Huse [Phys. Rev. Lett.89, 287001 (2002)], we discuss the interpretation of the experimental observations as arising from superconducting fluctuations and its relation to the vortex scenario proposed by Ong. We also comment on the implications of the Nernst analysis for understanding the full range of pseudogap phenomena.

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