scholarly journals MECHANISM OF HIGH-Tc SUPERCONDUCTIVITY BASED MAINLY ON TUNNELING MEASUREMENTS IN CUPRATES

2005 ◽  
Vol 19 (16) ◽  
pp. 743-770 ◽  
Author(s):  
A. MOURACHKINE
Keyword(s):  
Tunneling Spectroscopy ◽  
Phase Coherence ◽  
Spin Fluctuations ◽  
Cooper Pairs ◽  
High Tc ◽  
High Tc Superconductivity ◽  
One Dimensional ◽  
Topological Excitations ◽  
Discrete Breathers

The main purpose of this brief review is to present a sketch of the mechanism of high-Tc superconductivity based mainly on tunneling measurements in cuprates. In the review, we shall mostly discuss tunneling spectroscopy in Bi 2 Sr 2 CaCu 2 O 8. Analysis of the data shows that the Cooper pairs in cuprates are topological excitations (e.g. quasi-one-dimensional bisolitons, discrete breathers etc.), and the phase coherence among the Cooper pairs appears due to spin fluctuations.

THE ROLE OF QUASI-ONE-DIMENSIONAL STRUCTURES IN HIGH-Tc SUPERCONDUCTIVITY

1989 ◽  
Vol 03 (03) ◽  
pp. 427-439 ◽  
Author(s):  
N. M. BOGOLIUBOV ◽  
V. E. KOREPIN
Keyword(s):  
Critical Temperature ◽  
Critical Exponents ◽  
Electron Tunneling ◽  
Dimensional System ◽  
Cooper Pairs ◽  
High Tc ◽  
Mean Values ◽  
One Dimensional ◽  
The One

The critical exponents describing the decrease of correlation functions on long distances for the one-dimensional Hubbard model is obtained. The behaviour of correlators shows that Cooper pairs of electrons are formed. The electron tunneling between the chains leads to the existence of the anomalous mean values and to the superconductive current. The anisotropy of the quasi-one-dimensional system leads to the rise of critical temperature T c .

Antiferromagnetic spin fluctuations and high-TC superconductivity

1992 ◽  
Vol 53 (12) ◽  
pp. 1515-1521 ◽  
Author(s):  
Kazuo Ueda ◽  
Tôru Moriya ◽  
Yoshinori Takahashi
Keyword(s):  
Spin Fluctuations ◽  
High Tc ◽  
High Tc Superconductivity ◽  
Antiferromagnetic Spin

ROBUST STATISTICAL MECHANISM FOR PHONON-DRIVEN HIGH-Tc SUPERCONDUCTIVITY

2005 ◽  
Vol 19 (01n03) ◽  
pp. 17-28
Author(s):  
M. de LLANO ◽  
F. J. SEVILLA ◽  
M. A. SOLÍS ◽  
J. J. VALENCIA
Keyword(s):  
Cooper Pairs ◽  
High Tc ◽  
High Tc Superconductivity ◽  
Phonon Dynamics ◽  
Statistical Mechanism ◽  
Cp Symmetry

Though commonly unrecognized, a superconducting BCS condensate consists of equal numbers of two-electron (2e) and two-hole (2h) Cooper pairs (CPs). A new complete (in the sense that 2h-CPs are not ignored) boson-fermion statistical ternary gas model, however, is able to depart from this perfect 2e-/2h-CP symmetry. It yields robustly higher Tc's without abandoning electron-phonon dynamics, and reduces to all the known statistical theories of superconductors, including the BCS-Bose "crossover" picture—but goes considerably beyond it.

Cooper Pairs, Local Pairs, and TF-Scaled High-Tc Superconductivity

1991 ◽  
pp. 227-239 ◽  
Author(s):  
V. C. Aguilera-Navarro ◽  
M. de Llano ◽  
A. Plastino
Keyword(s):  
Cooper Pairs ◽  
High Tc ◽  
High Tc Superconductivity ◽  
Local Pairs
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