Ab initio study of plasmons and electron
... performed in the Laboratoire des Solides Irradiés. The strong dependence on the electronic wave vector, of the calculated electronic coupling of the upper valence band with the zone-center A1g LO phonon, explains the observation of a strongly k-dependent oscillation amplitude of the upper valence b ...
... performed in the Laboratoire des Solides Irradiés. The strong dependence on the electronic wave vector, of the calculated electronic coupling of the upper valence band with the zone-center A1g LO phonon, explains the observation of a strongly k-dependent oscillation amplitude of the upper valence b ...
Kinetic Theory - damtp - University of Cambridge
... head on, the particle appears as a disc with area π(d/2)2 . However, more relevant for our purposes is the effective cross-sectional area of the particle, πd2 . To see why this is, focus on a single particle as it makes its way through the gas. If it travels a distance l, it will sweep out a volume ...
... head on, the particle appears as a disc with area π(d/2)2 . However, more relevant for our purposes is the effective cross-sectional area of the particle, πd2 . To see why this is, focus on a single particle as it makes its way through the gas. If it travels a distance l, it will sweep out a volume ...
From Lindqvist and Keggin ions to electronically inverse hosts:
... the direction of the MEP minimum. This unique lone pair should be assigned the large value of the charge concentration, and consequently, the high basicity of the O site along that direction. The correlation between the energy of the MEP miniB mum and the critical points in −V2r is not so clear-cut ...
... the direction of the MEP minimum. This unique lone pair should be assigned the large value of the charge concentration, and consequently, the high basicity of the O site along that direction. The correlation between the energy of the MEP miniB mum and the critical points in −V2r is not so clear-cut ...
Theoretical modelling of steps on the CaF2(111) surface
... an sp basis set as well as with additional polarization d functions for Ca2+ . We found, however, that the d functions have very little effect on the equilibrium geometry, surface energy, and electron density of states. Therefore, further calculations of other low-index surfaces have been performed ...
... an sp basis set as well as with additional polarization d functions for Ca2+ . We found, however, that the d functions have very little effect on the equilibrium geometry, surface energy, and electron density of states. Therefore, further calculations of other low-index surfaces have been performed ...
Analysis of Multipactor Effect in Parallel-plate and
... The movement may eventually lead the electron to impact with any surface. Each collision can result in the emission or absorption of secondary electrons. The number of electrons emitted or absorbed after each impact is determined by the value of the secondary electron yield (SEY) parameter δ (δ > 1 ...
... The movement may eventually lead the electron to impact with any surface. Each collision can result in the emission or absorption of secondary electrons. The number of electrons emitted or absorbed after each impact is determined by the value of the secondary electron yield (SEY) parameter δ (δ > 1 ...
Three-dimensional head model simulation of transcranial magnetic
... information; however, current technical limitations preclude the complete characterization of the electromagnetic field distributions via this type of experimentation and necessitate the development of theoretical studies. Numerous theoretical models have been developed to provide scientists and phy ...
... information; however, current technical limitations preclude the complete characterization of the electromagnetic field distributions via this type of experimentation and necessitate the development of theoretical studies. Numerous theoretical models have been developed to provide scientists and phy ...
deformation of the plasma concentration profile due field of the
... space periodicity and motion direction of the electric field wave are similar to the current wave of electron beam (Fig.2). However after some time periods of modulation the space period of electric field starts decreasing while its magnitude in the LPRR gradually increases. Field spatial distributi ...
... space periodicity and motion direction of the electric field wave are similar to the current wave of electron beam (Fig.2). However after some time periods of modulation the space period of electric field starts decreasing while its magnitude in the LPRR gradually increases. Field spatial distributi ...
A bound for the range of a narrow light
... plane, we adopt the definition of second order moment of intensity, both for the width in the spatial domain and for the width in the spectral (Fourier) domain. These two quantities are related to each other via the uncertainty relations of Papoulis [16] for a 2D field distribution. An upper bound f ...
... plane, we adopt the definition of second order moment of intensity, both for the width in the spatial domain and for the width in the spectral (Fourier) domain. These two quantities are related to each other via the uncertainty relations of Papoulis [16] for a 2D field distribution. An upper bound f ...
Density of states
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In solid-state and condensed matter physics, the density of states (DOS) of a system describes the number of states per interval of energy at each energy level that are available to be occupied. Unlike isolated systems, like atoms or molecules in gas phase, the density distributions are not discrete like a spectral density but continuous. A high DOS at a specific energy level means that there are many states available for occupation. A DOS of zero means that no states can be occupied at that energy level. In general a DOS is an average over the space and time domains occupied by the system. Localvariations, most often due to distortions of the original system, are often called local density of states (LDOS). If the DOS of an undisturbedsystem is zero, the LDOS can locally be non-zero due to the presence of a local potential.