scholarly journals Specific-heat jump at the superconducting transition and the quantum critical nature of the normal state of pnictide superconductors

2009 ◽  
Vol 80 (21) ◽  
Author(s):  
J. Zaanen
Keyword(s):  
Specific Heat ◽  
Normal State ◽  
Superconducting Transition ◽  
Specific Heat Jump ◽  
Pnictide Superconductors ◽  
Quantum Critical

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.

Specific-heat jump atTcand normal-state magnetic susceptibility ofA3C60

1992 ◽  
Vol 69 (11) ◽  
pp. 1687-1690 ◽  
Author(s):  
A. P. Ramirez ◽  
M. J. Rosseinsky ◽  
D. W. Murphy ◽  
R. C. Haddon
Keyword(s):  
Magnetic Susceptibility ◽  
Specific Heat ◽  
Normal State ◽  
Specific Heat Jump

STUDY ON THE SPECIFIC HEAT OF Bi2Sr2CaCu2Oy SINGLE CRYSTAL

1989 ◽  
Vol 03 (02) ◽  
pp. 163-166 ◽  
Author(s):  
D.N. ZHENG ◽  
H.S. YANG ◽  
Z.J. CHEN ◽  
J.H. WANG ◽  
Y.F. YAN ◽  
...  
Keyword(s):  
Single Crystal ◽  
Specific Heat ◽  
Superconducting Transition ◽  
Specific Heat Jump

The specific heat of Bi 2 Sr 2 CaCu 2 O y has been measured using non-adiabatic method between 10 K and 130 K. No specific heat jump related to superconducting transition was observed around T c . This may be due to the defects and disorder of atoms existed in the single crystal.

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 Lattice-shifted nematic quantum critical point in FeSe1−xSx

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
S. Chibani ◽  
D. Farina ◽  
P. Massat ◽  
M. Cazayous ◽  
A. Sacuto ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Critical Point ◽  
Degrees Of Freedom ◽  
Quantum Critical Point ◽  
Substantial Effect ◽  
Low Energy ◽  
Elastic Coupling ◽  
Superconducting Transition ◽  
Local Moments ◽  
Quantum Critical

AbstractWe report the evolution of nematic fluctuations in FeSe1−xSx single crystals as a function of Sulfur content x across the nematic quantum critical point (QCP) xc ~ 0.17 via Raman scattering. The Raman spectra in the B1g nematic channel consist of two components, but only the low energy one displays clear fingerprints of critical behavior and is attributed to itinerant carriers. Curie–Weiss analysis of the associated nematic susceptibility indicates a substantial effect of nemato-elastic coupling, which shifts the location of the nematic QCP. We argue that this lattice-induced shift likely explains the absence of any enhancement of the superconducting transition temperature at the QCP. The presence of two components in the nematic fluctuations spectrum is attributed to the dual aspect of electronic degrees of freedom in Hund’s metals, with both itinerant carriers and local moments contributing to the nematic susceptibility.

Specific heat jump in non-Fermi superconductors

1998 ◽  
Vol 4 (2) ◽  
pp. 175-178 ◽  
Author(s):  
I. Tifrea ◽  
M. Crisan
Keyword(s):  
Specific Heat ◽  
Specific Heat Jump

Small jump of specific heat and small gap in iron pnictide superconductors

2010 ◽  
Vol 470 ◽  
pp. S368-S369 ◽  
Author(s):  
N. Nakai ◽  
H. Nakamura ◽  
Y. Ota ◽  
Y. Nagai ◽  
N. Hayashi ◽  
...  
Keyword(s):  
Specific Heat ◽  
Iron Pnictide ◽  
Pnictide Superconductors
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