We study the effect of impurities in inducing spin-orbit coupling in graphene. We show that the sp3 distortion induced by an impurity can lead to a large increase in the spin-orbit coupling with a value comparable to the one found in diamond and other zinc-blende semiconductors. The spin-flip scattering produced by the impurity leads to spin scattering lengths of the order found in recent exper...

A microscopic expression of the residual electrical resistivity tensor is derived in linear response theory for Rashba electrons scattering at a magnetic impurity with cylindrical or noncylindrical potential. The behavior of the longitudinal and transversal residual resistivity is obtained analytically and computed for an Fe impurity at the Au(111) surface. We studied the evolution of the resis...

We demonstrate analytically and numerically that the impurity mode plays a very important role in the kink scattering by a local inhomogeneity, and a sine-Gordon kink may be trapped by an impurity due to loss of its kinetic energy to excite the impurity mode. We develop a collective-coordinate approach to describe the kink—impurity interactions and calculate the threshold velocity ofkink captur...

Electron mobility in GaN and InN are calculated, by solving Boltzmann equation using iteration model, as a function of temperature for carrier concentrations of 10 16 , 10 17 , and 10 18 cm -3 . Both GaN and InN have maximum mobility between 100 and 200 K, depending on the electron density. The theoretical maximum mobility in GaN and InN at 300 K are about 1000 and 4400 cm 2 V -1 s 1. We compar...

Impurity scattering in the unitary limit produces low energy quasiparticles with anisotropic spectrum in a two-dimensional d-wave superconductor. We describe a new quasi-one-dimensional limit of the quasiparticle scattering, which might occur in a superconductor with short coherence length and with finite impurity potential range. The dc conductivity in a d-wave superconductor is predicted to b...

A nonequilibrium Green’s function method is applied to model high-field quantum transport and electronphonon resonances in semiconductor superlattices. The field-dependent density of states for elastic ~impurity! scattering is found nonperturbatively in an approach which can be applied to both high and low electric fields. I-V curves, and specifically electron-phonon resonances, are calculated ...

A quantum transport model incorporating spin scattering processes is presented using the non-equilibrium Green's function (NEGF) formalism within the self-consistent Born approximation. This model offers a unified approach by capturing the spin-flip scattering and the quantum effects simultaneously. A numerical implementation of the model is illustrated for magnetic tunnel junction devices with...

The correspondence between the steady-state theory of current transfer and scattering theory in a system of coupled tight-binding models of one-dimensional wires is explored. For weak interwire coupling both calculations give nearly identical results, except at singular points associated with band edges. The effect of decoherence in each of these models is studied using a generalization of the ...

We study the low-temperature properties of a spin-1 2 magnetic impurity coupled to a one-dimensional interacting electron system. Using the newly developed formalism by AAeck and Ludwig, with a scale invariant boundary condition replacing the impurity, we exploit boundary conformal eld theory to deduce the impurity thermal and magnetic response. In the case of only forward electron scattering o...

Calculations are presented of the in-plane far-infrared conductivity of a dx2−y2-wave superconductor, incorporating elastic scattering due to impurities and inelastic scattering due to spin fluctuations. The impurity scattering is modeled by short-range potential scattering with arbitrary phase shift, while scattering due to spin fluctuations is calculated within a weak-coupling Hubbard model p...