Role of structural instability in high-temperature superconductivity and its effect on isotope effect

1992 ◽  
Vol 128 (1) ◽  
pp. 105-110 ◽  
Author(s):  
A. Bussmann-Holder ◽  
A. R. Bishop ◽  
A. Migliori ◽  
Z. Fisk
Keyword(s):  
High Temperature ◽  
Isotope Effect ◽  
High Temperature Superconductivity ◽  
Structural Instability

scholarly journals Isotope Effect in the Translation-Invariant Bipolaron Theory of High-Temperature Superconductivity

2020 ◽  
Vol 5 (4) ◽  
pp. 80
Author(s):  
Victor D. Lakhno
Keyword(s):  
High Temperature ◽  
Isotope Effect ◽  
High Temperature Superconductivity ◽  
High Temperature Superconductors ◽  
Superconducting Transition ◽  
Strong Electron ◽  
Translation Invariant ◽  
Electron Phonon Interaction ◽  
Theory Of Superconductivity

It is shown that the translation-invariant bipolaron theory of superconductivity can explain the dependence of the isotope coefficient in high-temperature superconductors on the critical temperature of a superconducting transition: in the case of strong electron–phonon interaction, the isotope coefficient is low when doping is optimal and high when it is weak. It is demonstrated that in the case of London penetration depth, the absolute value of the isotope coefficient behaves in the opposite way. A conclusion of the great role of non-adiabaticity in the case of weak doping is made. The criteria for d-wave phonon input into the isotope effect is established.

New surprises “down below”: Recent successes in the synthesis of actinide materials

MRS Bulletin ◽  
2010 ◽  
Vol 35 (11) ◽  
pp. 877-882 ◽  
Author(s):  
J. L. Sarrao ◽  
Y. Haga ◽  
R. C. C. Ward
Keyword(s):  
High Temperature ◽  
Single Crystal ◽  
Periodic Table ◽  
High Temperature Superconductivity ◽  
Electronic States ◽  
High Quality

Recent discoveries of novel electronic states, including relatively high-temperature superconductivity, in the actinides point to exciting prospects for future discoveries at the bottom of the periodic table. A key ingredient in all of the successes discussed here is the role of high-quality synthesis in enabling advances. Results on PuCoGa51, NpPd5Al2, and single crystal uranium are discussed.

scholarly journals Role of Antiferromagnetic Fluctuations in High Temperature Superconductivity

10.5772/37813 ◽  
2012 ◽  
Author(s):  
Sung-Ho Suck ◽  
Jae-Hyeon Eom ◽  
Seung Joon ◽  
Jae-Gon Eom ◽  
Sung-Sik Lee
Keyword(s):  
High Temperature ◽  
High Temperature Superconductivity

Structural phase transition in YBa2Cu3O7−δ: the role of dimensionality for high temperature superconductivity

1987 ◽  
Vol 63 (5) ◽  
pp. 385-388 ◽  
Author(s):  
Ivan K. Schuller ◽  
D.G. Hinks ◽  
M.A. Beno ◽  
D.W. Capone ◽  
L. Soderholm ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Structural Phase Transition ◽  
High Temperature Superconductivity ◽  
Structural Phase

scholarly journals The Role of Polarons in Cuprates Hi-Tc Superconductivity

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
M. I. Umo
Keyword(s):  
High Temperature ◽  
Critical Temperature ◽  
Kinetic Equation ◽  
High Temperature Superconductivity ◽  
Boltzmann Kinetic Equation ◽  
Apical Oxygen ◽  
Phonon Contribution ◽  
Extension Model ◽  
Jahn Teller

The phonon contribution to the phenomenon of high temperature superconductivity in the cuprates is argued as being masked as polarons generated by the polarization of the charge reservoir accompanying the Jahn-Teller tilting of the apical oxygen. We discuss the Mahan oscillator-spring extension model as an analogy to the charge reservoir-CuO plane c-axis polarons. Using the Boltzmann kinetic equation, we show that the polaron dissociates or collapses at a temperature corresponding to the critical temperature of the superconductor.

Role of phonons in the mechanism of high-temperature superconductivity

2004 ◽  
Vol 408-410 ◽  
pp. 292-295 ◽  
Author(s):  
T. Egami ◽  
P. Piekarz ◽  
J.-H. Chung
Keyword(s):  
High Temperature ◽  
High Temperature Superconductivity
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