Domain formation in a one-dimensional superlattice with phonon scattering

2001 ◽  
pp. 813-814
Author(s):  
L. G. Mourokh ◽  
A. Yu. Smirnov ◽  
N. J. M. Horing ◽  
V. I. Gavrilenko
Keyword(s):  
Phonon Scattering ◽  
Domain Formation ◽  
One Dimensional

Polar Optical Phonon Instability and Intervalley Transfer in Gallium Nitride

1998 ◽  
Vol 512 ◽  
Author(s):  
B. E. Foutz ◽  
S. K. O'leary ◽  
M. S. Shur ◽  
L. F. Eastman ◽  
B. L. Gelmont ◽  
...  
Keyword(s):  
Gallium Nitride ◽  
Analytical Model ◽  
Optical Phonon ◽  
Room Temperature ◽  
Phonon Scattering ◽  
Polar Optical Phonon ◽  
Scattering Mechanism ◽  
Loss Mechanism ◽  
One Dimensional ◽  
Optical Phonon Scattering

ABSTRACTWe develop a simple, one-dimensional, analytical model, which describes electron transport in gallium nitride. We focus on the polar optical phonon scattering mechanism, as this is the dominant energy loss mechanism at room temperature. Equating the power gained from the field with that lost through scattering, we demonstrate that beyond a critical electric field, 114 kV/cm at T = 300 K, the power gained from the field exceeds that lost due to polar optical phonon scattering. This polar optical phonon instability leads to a dramatic increase in the electron energy, this being responsible for the onset of intervalley transitions. The predictions of our analytical model are compared with those of Monte Carlo simulations, and are found to be in satisfactory agreement.

Non-coherent diffusion of a vacancy in a one-dimensional lattice in the quasiclassical approximation

2021 ◽  
Vol 3 ◽  
pp. 24-29
Author(s):  
Yu.A. Kashlev ◽  
◽  
S.A. Maslyaev ◽  
Keyword(s):  
Phonon Scattering ◽  
Nonequilibrium Statistical Mechanics ◽  
Tight Binding ◽  
Classical Case ◽  
Quasiclassical Approximation ◽  
Finite Width ◽  
Dimensional Lattice ◽  
One Dimensional ◽  
Temperature Jumps ◽  
Two Factors

A vacancy in a one-dimensional lattice is considered as a vacant site in a one-dimensional chain of atoms. The energy model of this system is a double potential well with two levels. Based on the relations of nonequilibrium statistical mechanics, including the Kubo formula for the transport coefficient, the frequency of vacancy jumps is calculated. In this case, two factors of the system perturbation are taken into account: lattice deformation associated with the formation of an empty site, and phonon scattering by mass fluctuations in the chain. An analysis of two high-temperature jumps is given. First, the classical limit of vacancy motion under weak coupling conditions is considered for small values of the gradient of the interaction potential of the defect with the chain. In the classical case, the transition of an atom adjacent to a vacancy occurs through a quasy-stationary excited state. Secondly, a jump under tight binding conditions, when the motion of a neighboring atom occurs through a quasistationary state of finite width, and therefore having a finite lifetime.

Thermal conductivity of one-dimensional organic nanowires: effect of mass difference phonon scattering

2020 ◽  
Vol 31 (32) ◽  
pp. 324003
Author(s):  
Bohai Liu ◽  
Jun Zhou ◽  
Xiangfan Xu ◽  
Baowen Li
Keyword(s):  
Thermal Conductivity ◽  
Phonon Scattering ◽  
Mass Difference ◽  
One Dimensional
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