Anomalous thermal expansion of high-temperature superconductors at low temperatures

2007 ◽  
Vol 49 (8) ◽  
pp. 1429-1434 ◽  
Author(s):  
A. I. Golovashkin ◽  
A. P. Rusakov
Keyword(s):  
Thermal Expansion ◽  
High Temperature ◽  
Low Temperatures ◽  
High Temperature Superconductors ◽  
Anomalous Thermal Expansion

Anomalous thermal expansion of high-temperature superconductors Bi2Sr2−x LaxCuO6 at low temperatures

2006 ◽  
Vol 48 (8) ◽  
pp. 1439-1446
Author(s):  
N. V. Anshukova ◽  
A. I. Golovashkin ◽  
L. I. Ivanova ◽  
I. B. Krynetskiĭ ◽  
A. P. Rusakov
Keyword(s):  
Thermal Expansion ◽  
High Temperature ◽  
Low Temperatures ◽  
High Temperature Superconductors ◽  
Anomalous Thermal Expansion

Transverse vibration driven large uniaxial negative and zero thermal expansion in boron bridged REPt3B framework materials

2018 ◽  
Vol 20 (21) ◽  
pp. 14876-14883 ◽  
Author(s):  
Sudipta Mondal ◽  
Chandan Mazumdar ◽  
R. Ranganathan
Keyword(s):  
Thermal Expansion ◽  
Rare Earth ◽  
Transverse Vibration ◽  
Low Temperatures ◽  
Linear Chain ◽  
Rare Earth Compounds ◽  
Thermal Expansion Behavior ◽  
Framework Materials ◽  
Expansion Behavior ◽  
Anomalous Thermal Expansion

REPt3B (RE = rare-earth) compounds exhibit anomalous thermal expansion behavior at low temperatures driven by transverse vibration of boron atoms perpendicular to the Pt(2)–B–Pt(2) linear chain.

Specific heat and thermal expansion of the Bi and Tl high temperature superconductors nearT c

1991 ◽  
Vol 84 (3) ◽  
pp. 333-341 ◽  
Author(s):  
E. Braun ◽  
W. Schnelle ◽  
H. Broicher ◽  
J. Harnischmacher ◽  
D. Wohlleben ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
High Temperature ◽  
Specific Heat ◽  
High Temperature Superconductors

Anomalous Thermal Expansion in HTS

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3251-3253 ◽  
Author(s):  
N. V. Anshukova ◽  
A. I. Golovashkin ◽  
L. I. Ivanova ◽  
I. B. Krinetskiy ◽  
A. P. Rusakov
Keyword(s):  
Thermal Expansion ◽  
Charge Density ◽  
Low Temperatures ◽  
Charge Density Waves ◽  
Density Waves ◽  
Anomalous Thermal Expansion

The data about anomalous thermal expansion α(T) at low temperatures are presented for number of oxide HTS system. The anomaly of thermal expansion in such systems is explained in the terms of charge density waves instability.

THE SURFACE IMPEDANCE OF HIGH Tc SUPERCONDUCTORS

1989 ◽  
Vol 03 (01) ◽  
pp. 5-13 ◽  
Author(s):  
J. CARINI ◽  
L. DRABECK ◽  
G. GRÜNER
Keyword(s):  
High Temperature ◽  
Temperature Dependence ◽  
Power Law ◽  
Surface Impedance ◽  
Low Temperatures ◽  
Qualitative Agreement ◽  
Surface Resistance ◽  
High Temperature Superconductors ◽  
High Tc Superconductors ◽  
High Tc

Recent experiments on the surface impedance of the high temperature superconductors are summarized. The overall temperature dependence of the penetration depth is in broad qualitative agreement with conventional pairing, but with an anomolous power law behavior observed at low temperatures. The surface resistance is orders of magnitude larger than estimates based on the Mattis-Bardeen theory. One possibility is unconventional pairing, but structural inhomogenities are the most likely explanation for the experimental results.

scholarly journals Observation of Josephson-like Tunneling Junction Characteristics and Positive Magnetoresistance in Oxygen Deficient Nickelate Films of Nd0.8Sr0.2NiO3−δ

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7689
Author(s):  
Gad Koren ◽  
Anna Eyal ◽  
Leonid Iomin ◽  
Yuval Nitzav
Keyword(s):  
High Temperature ◽  
Low Temperatures ◽  
High Temperature Superconductors ◽  
Variable Range Hopping ◽  
Tunneling Junction ◽  
Infinite Layer ◽  
In Series ◽  
New Type ◽  
Tunneling Behavior ◽  
Sis Junctions

Nickelate films have recently attracted broad attention due to the observation of superconductivity in the infinite layer phase of Nd0.8Sr0.2NiO2 (obtained by reducing Sr doped NdNiO3 films) and their similarity to the cuprates high temperature superconductors. Here, we report on the observation of a new type of transport in oxygen poor Nd0.8Sr0.2NiO3−δ films. At high temperatures, variable range hopping is observed while at low temperatures a novel tunneling behavior is found where a Josephson-like tunneling junction characteristic with serial resistance is revealed. We attribute this phenomenon to coupling between superconductive (S) surfaces of the grains in our Oxygen poor films via the insulating (I) grain boundaries, which yields SIS junctions in series with the normal (N) resistance of the grains themselves. The similarity of the observed conductance spectra to the tunneling junction characteristic with Josephson-like current is striking, and seems to support the existence of superconductivity in our samples.

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