scholarly journals Electron Pairing Interaction and Electronic Spectra of Linear Polyene

1974 ◽  
Vol 47 (10) ◽  
pp. 2618-2618 ◽  
Author(s):  
Sadhan Basu
Keyword(s):  
Electronic Spectra ◽  
Pairing Interaction ◽  
Electron Pairing ◽  
Linear Polyene

scholarly journals THE 3d-TO-4s-BY-2p HIGHWAY TO SUPERCONDUCTIVITY IN CUPRATES

2002 ◽  
Vol 16 (30) ◽  
pp. 4577-4585 ◽  
Author(s):  
TODOR M. MISHONOV ◽  
JOSEPH O. INDEKEU ◽  
EVGENI S. PENEV
Keyword(s):  
High Temperature ◽  
Critical Temperature ◽  
High Temperature Superconductors ◽  
Electron Exchange ◽  
Theoretical Physics ◽  
Pairing Interaction ◽  
Electron Pairing

High-temperature superconductors are nowadays found in great variety and hold technological promise. It is still an unsolved mystery that the critical temperature T c of the basic cuprates is so high. The answer might well be hidden in a conventional corner of theoretical physics, overlooked in the recent hunt for exotic explanations of new effects in these materials. A forgotten intra-atomic s–d two-electron exchange in the Cu atom is found to provide a strong (~ eV) electron pairing interaction. A Bardeen–Cooper–Schrieffer approach can explain the main experimental observations and predict the correct dx2-y2 symmetry of the gap.

scholarly journals Metamaterial superconductors

Nanophotonics ◽  
2018 ◽  
Vol 7 (5) ◽  
pp. 795-818 ◽  
Author(s):  
Igor I. Smolyaninov ◽  
Vera N. Smolyaninova
Keyword(s):  
Dielectric Response ◽  
High Temperature Superconductivity ◽  
Traditional Approach ◽  
Pure Aluminum ◽  
Liquid Nitrogen Temperature ◽  
Electron Interaction ◽  
Pairing Interaction ◽  
Hyperbolic Metamaterials ◽  
Electron Pairing ◽  
Electromagnetic Metamaterials

AbstractSearching for natural materials exhibiting larger electron-electron interactions constitutes a traditional approach to high-temperature superconductivity research. Very recently, we pointed out that the newly developed field of electromagnetic metamaterials deals with the somewhat related task of dielectric response engineering on a sub-100-nm scale. Considerable enhancement of the electron-electron interaction may be expected in such metamaterial scenarios as in epsilon near-zero (ENZ) and hyperbolic metamaterials. In both cases, dielectric function may become small and negative in substantial portions of the relevant four-momentum space, leading to enhancement of the electron pairing interaction. This approach has been verified in experiments with aluminum-based metamaterials. Metamaterial superconductor with Tc=3.9 K have been fabricated, which is three times that of pure aluminum (Tc=1.2 K), which opens up new possibilities to improve the Tc of other simple superconductors considerably. Taking advantage of the demonstrated success of this approach, the critical temperature of hypothetical niobium, MgB2- and H2S-based metamaterial superconductors is evaluated. The MgB2-based metamaterial superconductors are projected to reach the liquid nitrogen temperature range. In the case of an H2S-based metamaterial, the projected Tc appears to reach ~250 K.

Heuristic Considerations Suggesting a Role for Electron Pairing in Thermodynamically Consistent Pathways of Enzyme Catalysis

1978 ◽  
Vol 33 (10) ◽  
pp. 1206-1209 ◽  
Author(s):  
Michael Conrad
Keyword(s):  
Electronic Structure ◽  
Reaction Mechanism ◽  
Complex Formation ◽  
Enzyme Catalysis ◽  
Pairing Interaction ◽  
Electron Pairing ◽  
Hypothetical Reaction

Abstract Nuclear motions accompanying enzyme catalysis are described in terms of a hypothetical reaction mechanism in which instabilities of electronic structure arise from short-lived pairing resonances of parallel spin electrons. A pairing interaction is proposed which has its basis in confinement constraints imposed by complex formation.

The electronic spectra of diphenyl-sulphide and DI-2-pyridyl-sulphide. A CNDO/S treatment

1976 ◽  
Vol 73 ◽  
pp. 523-526 ◽  
Author(s):  
Vinicio Galasso ◽  
Giuseppe C. Pappalardo ◽  
Giuseppe Scarlata
Keyword(s):  
Electronic Spectra
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