نتایج جستجو برای: electric field effect

تعداد نتایج: 2421493  

1995
Sujan Sengupta

The role of the parameter ‘a’ associated with the Kerr metric which represents the angular momentum per unit mass of a rotating massive object has been converted into determining the rotationally induced quadrapole electric field outside a rotating massive object with external dipole magnetic field. A comparison of the result with that of the Newtonian case implies that the parameter ‘a’ repres...

2007

A laser beam can be characterized by measuring its spatial intensity profile at points perpendicular to its direction of propagation. The spatial intensity profile is the variation of intensity as a function of distance from the center of the beam, in a plane perpendicular to its direction of propagation. It is often convenient to think of a light wave as being an infinite plane electromagnetic...

2009
M. Zahn

Kerr electro-optic fringe patterns have long been used to study space charge injection and transport phenomena in highly birefringent materials such as nitrobenzene. Most past experimental work has been limited to 1 or 2-dimensional geometries where the electric field magnitude and direction have been constant along the light path such as two concentric or parallel cylinders or parallel plate e...

1999
H. M. Przewlocki

A comprehensive model is presented of the internal photoemission in MOS systems, at low electric fields (| | < 104 V/cm) in the dielectric. Model equations are separately solved for the case of zero photocurrent (J = 0) and for nonzero photocurrent (J ≠ 0), allowing calculation of various photoelectric characteristics of MOS structures. These calculated characteristics are shown to remain in ex...

2006
Yanxia Xing Qing-feng Sun Liang Tang JiangPing Hu

We show that the spin-orbit interaction induced by the boundary-confining potential causes opposite spin accumulations on the transverse edges in a zonal two-dimensional electron gas in the presence of an external longitudinal electric field. While the bias is reversed, the spin-polarized direction is also reversed. The intensity of the spin accumulation is proportional to the bias voltage. In ...

2011
Hirosi Ooguri Masaki Oshikawa

It has been pointed out that the axion electrodynamics exhibits instability in the presence of a background electric field. We show that the instability leads to a complete screening of an applied electric field above a certain critical value and the excess energy is converted into a magnetic field. We clarify the physical origin of the screening effect and discuss its possible experimental rea...

2012
Siddharth Gadkari Rochish Thaokar

The effect of viscosity ratio (λ, defined as viscosity of surrounding medium/viscosity of fluid jet) on stability of axisymmetric (m=0) and asymmetric (m=1) modes of perturbation on a liquid-liquid jet in presence of radial electric field (E0 ), is studied using linear stability analysis. The viscosity ratio is shown to have a damping effect on both the modes of perturbation. However the effect...

1993
Alan T. Dorsey

We study the flux-flow Hall effect and thermomagnetic transport near the upper critical field Hc2 in extreme type-II superconductors starting from a suitable generalization of the time dependent Ginzburg-Landau equations. We explicitly incorporate the effects of backflow into the calculations of the local electric field and current, leading to a current which is properly divergenceless. The Hal...

2010
S. W. Tsang M. W. Denhoff Y. Tao Z. H. Lu

In order to provide an accurate theoretical description of current density voltage (J −V ) characteristics of an organic heterojunction device over a wide range of electric fields at various temperatures, it is proposed that an accumulation of charge carriers at the heterojunction will lead to a reduction in the barrier height across the heterojunction. Two well-known hole transporting material...

2008
R. N. Cahn J. D. Jackson

The drift and diffusion of a cloud of ions in a fluid are distorted by an inhomogeneous electric field. If the electric field carries the center of the distribution in a straight line and the field configuration is suitably symmetric, the distortion can be calculated analytically. We examine the specific examples of fields with cylindrical and spherical symmetry in detail assuming the ion distr...

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