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Showing 1 to 8 of 8 for “"Momentum relaxation"”.
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Carrier momentum relaxation in highly doped polar semiconductors and semiconductor heterostructures
… and the coupled collective modes transfer momentum between each other. Carrier momentum transferred to polar phonons can be lost to other phonons through anharmonic decay, resulting in a finite carrier mobility. The plasmons do not have a decay mechanism which transfers carrier momentum …
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Disorder in holographic field theories: inhomogeneous geometries, momentum relaxation and SYK models
… of phenomenological holographic models in which momentum relaxation can be achieved without breaking translational symmetry in the dual geometry. In particular, we focus on an example in which the dual geometry is similar to anti-de Sitter (AdS) Brans-Dicke theory. We study the thermodynamic and …
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Finite difference time domain simulation of subpicosecond semiconductor optical devices
… the balance equations using the energy and momentum relaxation time approximation. Based on the structure of the device, a physical semi-analytical model is also developed for preliminary analysis. Simulation results in the device's subpicosecond responses including nonlinearity and …
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Studies of strongly-correlated fermions in an optical lattice
… two such studies. In the first, we observe the momentum relaxation of strongly-correlated fermions in the absence of disorder. We find a violation of the weak-scattering prediction for the scaling with temperature, which is analogous to the linear-in-temperature scaling of resistivity in …
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Aspects of transport in strongly correlated systems with gravity duals
… in line with other gravity backgrounds with momentum relaxation. In the BD models studied, we observed insulating like features in the dc conductivity. However, the module and argument of the optical conductivity at intermediate frequencies are not consistent with cuprates experimental …
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Nonlinear transport in semiconductor superlattices
… transport equation and include energy and momentum relaxation. They also incorporate the self-consistent electric field generated by electron motion. In a temporally periodic external electric field, the applied magnetic field and the self-consistent electric field lead to novel nonlinear …
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Der Einfluß retardierter hydrodynamischer Wechselwirkungen auf die Bewegung von Kugeln in einer Suspension
… of suspensions. On the fast time scale of momentum relaxation, on which the correlations of the fluid velocity decay, the retardation of the propagation of the hydrodynamic interactions has to be taken into account. In this work the hydrodynamic interactions are treated on the basis of the …
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Investigations of electron scattering mechanisms at the silicon-silicon dioxide interface
… equation with constant field and constant relaxation time approximations. The surface scattering mechanisms were included in the Fuchs boundary condition for normally incident scattering. The mechanisms investigated are diffuse scattering, constant partially specular scattering, de Broglie …