Electron-phonon coupling and vibrational modes contributing to linear electro-optic effect of the efficient NLO chromophore 4-(N,N-dimethylamino)-N-methyl-4′-toluene sulfonate (DAST) from their vibrational spectra

2009 ◽  
Vol 40 (1) ◽  
pp. 52-63 ◽  
Author(s):  
T. Vijayakumar ◽  
I. Hubert Joe ◽  
C. P. Reghunadhan Nair ◽  
Mojca Jazbinsek ◽  
V. S. Jayakumar
Keyword(s):  
Vibrational Spectra ◽  
Vibrational Modes ◽  
Phonon Coupling ◽  
Toluene Sulfonate ◽  
Electro Optic ◽  
Electron Phonon Coupling

Direct evidence of the importance of electron-phonon coupling inLa2CuO4: Photoinduced ir-active vibrational modes

1987 ◽  
Vol 36 (13) ◽  
pp. 7252-7255 ◽  
Author(s):  
Y. H. Kim ◽  
A. J. Heeger ◽  
L. Acedo ◽  
G. Stucky ◽  
F. Wudl
Keyword(s):  
Direct Evidence ◽  
Vibrational Modes ◽  
Phonon Coupling ◽  
Electron Phonon Coupling

Polaron Crystallization and the Metal–Insulator Transition

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3131-3136 ◽  
Author(s):  
P. Quémerais ◽  
S. Fratini
Keyword(s):  
Physical Mechanism ◽  
Insulator Transition ◽  
Vibrational Modes ◽  
Zero Temperature ◽  
Phonon Coupling ◽  
Metal Insulator Transition ◽  
Strong Electron ◽  
Metal Insulator ◽  
Electron Phonon Coupling ◽  
Polar Materials

The Crystallization of polarons at finite density, due to the long-range Coulomb forces — when no bipolarons can be formed — is discussed close to the metal–insulator transition (MIT). As a function of the density, the melting is examined at zero temperature. By calculating the quantum fluctuations of both the electron and the polarization, we show that at strong electron–phonon coupling the dissociation of the polarons at the MIT is favored, rather than the melting towards a polaron liquid. In this regime, we demonstrate, that an instability of the transverse vibrational modes of the polaron crystal occurs as the density increases. This provides a new physical mechanism for the MIT in polar materials, for which an experimental signature is predicted.

Neutron Spectroscopy of Superconducting Fullerides

1992 ◽  
Vol 270 ◽  
Author(s):  
Kosmas Prassides ◽  
Christos Christides ◽  
John Tomkinson ◽  
Matthew J. Rosseinsky ◽  
D. W. Murphy ◽  
...  
Keyword(s):  
Low Temperatures ◽  
High Energy ◽  
Inelastic Neutron ◽  
Low Energy ◽  
Vibrational Modes ◽  
Phonon Coupling ◽  
Phonon Spectra ◽  
Electron Phonon Coupling ◽  
Wide Range ◽  
Mechanism Of Superconductivity

ABSTRACTThe phonon spectra of pristine fullerene, superconducting K3C60 and saturation-doped Rb6C60 measured by inelastic neutron scatteringin the energy range 2.5 - 200 meV at low temperatures reveal substantial broadening of five-fold degenerate Hg intramolecular vibrational modes both in the low-energy radial and the high-energy tangential part of the spectrum. This provides strong evidence for a traditional phonon-mediated mechanism of superconductivity in the fullerides but with an electron-phonon coupling strength distributed over a wide range of energies (33-195 meV) as a result of the finite curvature of the fullerene spherical cage.

Observation of Core Phonon in Electron–Phonon Coupling in Au25 Nanoclusters

2021 ◽  
Vol 12 (6) ◽  
pp. 1690-1695
Author(s):  
Zhongyu Liu ◽  
Yingwei Li ◽  
Wonyong Shin ◽  
Rongchao Jin
Keyword(s):  
Phonon Coupling ◽  
Electron Phonon Coupling

scholarly journals Electron-phonon coupling in the magnetic Weyl semimetal ZrCo2Sn

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
I.Yu. Sklyadneva ◽  
R. Heid ◽  
P. M. Echenique ◽  
E. V. Chulkov
Keyword(s):  
Phonon Coupling ◽  
Weyl Semimetal ◽  
Electron Phonon Coupling
Sign in / Sign up

Export Citation Format

Share Document