ELECTRONIC THEORY FOR ELECTRON-DOPED CUPRATE SUPERCONDUCTORS: d-WAVE SUPERCONDUCTIVITY AND THE PHASE DIAGRAM

2000 ◽  
Vol 14 (29n31) ◽  
pp. 3555-3560
Author(s):  
D. MANSKE ◽  
I. EREMIN ◽  
K. H. BENNEMANN
Keyword(s):  
Cuprate Superconductors ◽  
Narrow Range ◽  
Spin Fluctuation ◽  
Flat Band ◽  
Superconducting Transition ◽  
Phonon Interaction ◽  
Pairing Mechanism ◽  
Lattice Disorder ◽  
Electron Phonon Interaction ◽  
The One

Using the one-band Hubbard Hamiltonian we determine various basic properties of the electron-doped cuprate superconductor Nd 2-x Ce x CuO 4 for a spin-fluctuation-induced pairing mechanism. We find a narrow range of superconductivity and, most importantly, like for hole-doped cuprates dx2-y2 -symmetry for the superconducting order parameter. The superconducting transition temperatures Tc(x) for various electron doping concentrations x are calculated to be much smaller than for hole-doped cuprates due to the different energy dispersion and a flat band well below the Fermi level. We find that lattice disorder may sensitively distort the dx2-y2 -symmetry via electron-phonon interaction yielding a finite isotope exponent α0.

Hot Electrons Relaxation

1990 ◽  
Vol 209 ◽  
Author(s):  
A.M. Mazzone
Keyword(s):  
Simulation Method ◽  
High Energy ◽  
Hot Electrons ◽  
Direct Simulation ◽  
Thermal Spike ◽  
Phonon Interaction ◽  
Lattice Disorder ◽  
Electron Phonon Interaction ◽  
Quantum Mechanical Representation ◽  
The One

ABSTRACTThis work represents the first attempt of a direct simulation of the processes of electron-phonon interaction and lattice excitation which follow the formation of an excited electron gas such as, for instance, is the one produced by high-energy implants. The simulation method is of the type molecular dynamics and is based on a quantum mechanical representation. The results suggest a lattice disorder similar to the one of a thermal spike.

scholarly journals Influence of electron-phonon interaction on spin-fluctuation-induced superconductivity

1999 ◽  
Vol 59 (13) ◽  
pp. 8859-8868 ◽  
Author(s):  
T. S. Nunner ◽  
J. Schmalian ◽  
K. H. Bennemann
Keyword(s):  
Spin Fluctuation ◽  
Phonon Interaction ◽  
Electron Phonon Interaction

THE REFLECTIVITY OF THE MIXED CRYSTAL AB1-xCx

2010 ◽  
Vol 24 (27) ◽  
pp. 5337-5343
Author(s):  
XIAOYAN ZHANG ◽  
JINGFENG WANG ◽  
GUOLIANG FAN
Keyword(s):  
Mixed Crystal ◽  
Random Element ◽  
Mixed Crystals ◽  
Phonon Interaction ◽  
Long Wavelength ◽  
Electron Phonon Interaction ◽  
The Third ◽  
Optical Character ◽  
Mode Behavior ◽  
The One

The properties of long wavelength optical phonons in mixed crystals AB 1-x C x is discussed by a model similar to Modified Random Element Isodisplacement (MREI). Using this method we investigate the frequencies, the dielectric functions, and the reflectivity of several mixed crystals. It is found that this model can be applied to the one-mode behavior, the two-mode behavior, and that of the third category. So the model provides a possible way to understand the optical character of the ternary mixed crystal. Based on it, we can discuss other problems similar to electron–phonon interaction and so on.

scholarly journals Квантовый размерный эффект в сверхпроводящих пленках алюминия

2019 ◽  
Vol 61 (9) ◽  
pp. 1609
Author(s):  
К.Ю. Арутюнов ◽  
Е.А. Седов ◽  
И.А. Голоколенов ◽  
В.В. Завьялов ◽  
Г. Константинидис ◽  
...  
Keyword(s):  
Critical Temperature ◽  
Superconducting Transition ◽  
Phonon Interaction ◽  
High Quality ◽  
Aluminum Films ◽  
Noticeable Increase ◽  
Electron Phonon Interaction ◽  
Quantum Size ◽  
Gaas Substrates ◽  
Density Of Electron States

High-quality aluminum films on GaAs substrates were experimentally studied. A noticeable increase in the critical temperature of the superconducting transition with a decrease in the film thickness was found. The effect is interpreted as manifestation of the quantum size effect, which affects both the density of electron states and the electron-phonon interaction.

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