Effect of nonrelativistic and relativistic electron mass variation on absorption characteristics in magnetized semiconductor plasma: A comparative study

AbstractWe studied the influence of the classical relativistic beam of electrons on the hole acoustic wave (HAW) instability exciting in the semiconductor quantum plasmas. We conducted this study by using the quantum-hydrodynamic model of dense plasmas, incorporating the quantum effects of semiconductor plasma species which include degeneracy pressure, exchange-correlation potential and Bohm potential. Analysis of the quantum characteristics of semiconductor plasma species along with relativistic effect of beam electrons on the dispersion relation of the HAW is given in detail qualitatively and quantitatively by plotting them numerically. It is worth mentioning that the relativistic electron beam (REB) stabilises the HAWs exciting in semiconductor (GaAs) degenerate plasma.

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Comparative study on the digestion and absorption characteristics of n-3 LCPUFA-enriched phospholipids in the form of liposomes and emulsions

Food Research International ◽

10.1016/j.foodres.2020.109428 ◽

2020 ◽

Vol 137 ◽

pp. 109428

Author(s):

Shan Jiang ◽

Tian-Tian Zhang ◽

Pei-Xu Cong ◽

Jie Xu ◽

Chang-Hu Xue ◽

...

Keyword(s):

Comparative Study ◽

Absorption Characteristics

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Self-focusing of electormagnetic waves as a result of relativistic electron-mass variation

Journal of Plasma Physics ◽

10.1017/s0022377800021097 ◽

1977 ◽

Vol 18 (2) ◽

pp. 293-303 ◽

Cited By ~ 19

Author(s):

Karl H. Spatschek

Keyword(s):

Schrödinger Equation ◽

Electric Field ◽

Relativistic Electron ◽

Nonlinear Schrödinger Equation ◽

Schrodinger Equation ◽

Higher Order ◽

Nonlinear Schrodinger Equation ◽

The Self ◽

Electron Mass ◽

Self Focusing

Relativistic electron-mass variations due to the presence of intense electromagnetic radiation in the plasma cause a nonlinear refractive index. Using a variational principle the latter is obtained up to fourth order in the electric field amplitude and it is shown that nonlinear effects of the second order lead to self-focusing of a beam of radiation. By nonlinear optics considerations, the self- focusing length of an axially symmetric beam is obtained. Including higher- order dispersive effects it is shown that within the thin-beam approximation thecomplex electric field envelope obeys a cubic nonlinear Schrödinger equation with an attractive self-consistent potential. The cylindrically symmetric nonlinear Schrödinger equation predicts collapse of the radiation at the self-focusing distance. The nature of the self-focusing singularity is analysed and it is shown that higher-order nonlinearities saturate the amplitude. Then oscillations of beam radius along the axial direction occur.

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