scholarly journals The effect of perpendicular electric field on temperature-induced plasmon excitations for intrinsic silicene

RSC Advances ◽  
2015 ◽  
Vol 5 (64) ◽  
pp. 51912-51918 ◽  
Author(s):  
Jhao-Ying Wu ◽  
Chiun-Yan Lin ◽  
Godfrey Gumbs ◽  
Ming-Fa Lin
Keyword(s):  
Electric Field ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Tight Binding ◽  
Phase Approximation ◽  
Tight Binding Model ◽  
Binding Model

We use the tight-binding model and the random-phase approximation to investigate the intrinsic plasmon in silicene.

scholarly journals PERSISTENT CURRENT IN ONE-DIMENSIONAL NON-SUPERCONDUCTING MESOSCOPIC RINGS: EFFECTS OF SINGLE HOPPING IMPURITY, IN-PLANE ELECTRIC FIELD AND FOREIGN ATOMS

2008 ◽  
Vol 22 (28) ◽  
pp. 4951-4965 ◽  
Author(s):  
SANTANU K. MAITI
Keyword(s):  
Magnetic Flux ◽  
Electric Field ◽  
Tight Binding ◽  
Persistent Current ◽  
Tight Binding Model ◽  
Binding Model ◽  
One Dimensional

Persistent current in one-dimensional non-superconducting mesoscopic rings threaded by slowly varying magnetic flux ϕ is studied based on the tight-binding model. The behavior of the persistent current is discussed in three aspects: (a) single hopping impurity, (b) in-plane electric field and (c) in the presence of some foreign atoms.

scholarly journals Wave Propagation Through a Coherently Amplifying Random Medium

1998 ◽  
Vol 12 (15) ◽  
pp. 1555-1572 ◽  
Author(s):  
Sandeep K. Joshi ◽  
A. M. Jayannavar
Keyword(s):  
Wave Propagation ◽  
Stationary Distribution ◽  
Random Phase Approximation ◽  
Numerical Study ◽  
Random Medium ◽  
Random Phase ◽  
Tight Binding ◽  
Mean Value ◽  
Phase Approximation ◽  
Lasing Medium

We report a detailed and systematic numerical study of wave propagation through a coherently amplifying random one-dimensional medium. The coherent amplification is modeled by introducing a uniform imaginary part in the site energies of the disordered single-band tight binding Hamiltonian. Several distinct length scales (regimes), most of them new, are identified from the behavior of transmittance and reflectance as a function of the material parameters. We show that the transmittance is a non-self-averaging quantity with a well defined mean value. The stationary distribution of the super reflection differs qualitatively from the analytical results obtained within the random phase approximation in strong disorder and amplification regime. The study of the stationary distribution of the phase of the reflected wave reveals the reason for this discrepancy. The applicability of random phase approximation is discussed. We emphasize the dual role played by the lasing medium, as an amplifier as well as a reflector.

Interpretation of Preferential Adsorption Using Random Phase Approximation Theory

1995 ◽  
Vol 60 (10) ◽  
pp. 1641-1652 ◽  
Author(s):  
Henri C. Benoît ◽  
Claude Strazielle
Keyword(s):  
Approximation Theory ◽  
Random Phase Approximation ◽  
Virial Coefficient ◽  
Random Phase ◽  
Second Virial Coefficient ◽  
Solvent Mixture ◽  
Gyration Radius ◽  
Thermodynamic Quantities ◽  
Phase Approximation ◽  
Preferential Adsorption

It has been shown that in light scattering experiments with polymers replacement of a solvent by a solvent mixture causes problems due to preferential adsorption of one of the solvents. The present paper extends this theory to be applicable to any angle of observation and any concentration by using the random phase approximation theory proposed by de Gennes. The corresponding formulas provide expressions for molecular weight, gyration radius, and the second virial coefficient, which enables measurements of these quantities provided enough information on molecular and thermodynamic quantities is available.

Neutrino reactions onC12by the quasiparticle random-phase approximation (QRPA)

2010 ◽  
Vol 81 (2) ◽  
Author(s):  
Myung-Ki Cheoun ◽  
Eunja Ha ◽  
Su Youn Lee ◽  
K. S. Kim ◽  
W. Y. So ◽  
...  
Keyword(s):  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Quasiparticle Random Phase Approximation
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