Spin effect on parametric interactions of waves in magnetoplasmas

Shahid, Muhammad; Melrose, D. B.; Jamil, Muhammad; Murtaza, G.

doi:10.1063/1.4769099

Cited by 16 publications

(8 citation statements)

References 28 publications

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“…For highdensity plasma, quantum features due to the intrinsic magnetic moment of the electron become noticeable and their spin effect (Polyakov, 1979;Marklund and Brodin, 2007;Brodin and Marklund, 2008) in plasma are found to be somewhat different from those of non-spin (Rastunkov and Krainov, 2004;Manfredi, 2005) quantum effects in plasma. During the last decade, there have been many papers devoted to the influence of spin-1/2 effect on dynamics of plasma (Shahid et al, 2012;Hu et al, 2016). Previous studies in quantum plasma have been performed taking the macroscopic average of the electron spin.…”

Section: Introductionmentioning

confidence: 99%

Surface plasma wave in spin-polarized semiconductor quantum plasma

Kumar

Ahmad

2020

Laser Part. Beams

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AbstractThe possibilities of surface plasma wave (SPW) on a metal-vacuum interface in semiconductor quantum plasma by considering the effects of Coulomb exchange (CE) interaction and the spin-polarization has been explored. The dispersion for the SPW has been setup using the modified quantum hydrodynamic (QHD) model taking into account the Fermi pressure, the quantum Bohm force, the CE, and the electron spin. The optical gain of SPW has been evaluated. It is found that CE effects and spin-polarization increases the wave frequency and enhances the gain during the stimulated emission.

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Section: Introductionmentioning

confidence: 99%

Surface plasma wave in spin-polarized semiconductor quantum plasma

Kumar

Ahmad

2020

Laser Part. Beams

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“…Spin effects further contribute towards the measurement of magnetic field in association with plasma waves as well as in the resonance line of plasmas and its Doppler broadening width. [16,17] The paper is arranged as follows. Section 2 consists of the basic set of equations that govern the dynamics of ions and electrons, written with normalization.…”

Section: Introductionmentioning

confidence: 99%

Damped electrostatic ion acoustic solitary wave structures in quantum plasmas with Bohm potential and spin effects

2019

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Nonlinear properties of ion acoustic solitary waves are studied in the case of dense magnetized plasmas. The degenerate electrons with relative density effects from their spin states in the same direction and from equally probable up and down spinning states are taken up separately. Quantum statistical as well as quantum tunneling effects for both types of electrons are taken. The ions have large inertia and are considered classically, whereas the electrons are degenerate. The collisions of ions and electrons with neutral atoms are considered. We derive the deformed Korteweg de-Vries (DKdV) equation for small amplitude electrostatic potential disturbances by employing the reductive perturbation technique. The Runge-Kutta method is applied to solve numerically the DKdV equation. The analytical solution of DKdV is also presented with time dependence. We discuss the profiles for velocity, amplitude, and time variations in solitons for the cases when all the electrons are spinning in the same direction and for the case when there is equal probability of electrons having spin up and spin down. We have found that the wave is unstable because of the collisions between neutral gas molecules and the charged plasmas particles in the presence of degenerate electrons.

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Section: Introductionmentioning

confidence: 99%

“…Corresponding QHD equations were directly derived from the Pauli equation [12]. Let us mention a couple of papers [15], [16], where attempts to suggest separated spin evolution QHD were made. Some results on spinless quantum plasmas and quantum plasmas of spin-1/2 particles were reviewed in Refs.…”

Section: Introductionmentioning

confidence: 99%

Oblique propagation of longitudinal waves in magnetized spin-1/2 plasmas: Independent evolution of spin-up and spin-down electrons

Andreev

Kuz'menkov

2015

Annals of Physics

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We consider quantum plasmas of electrons and motionless ions. We describe separate evolution of spin-up and spin-down electrons. We present corresponding set of quantum hydrodynamic equations. We assume that plasmas are placed in an uniform external magnetic field. We account different occupation of spin-up and spin-down quantum states in equilibrium degenerate plasmas. This effect is included via equations of state for pressure of each species of electrons. We study oblique propagation of longitudinal waves. We show that instead of two well-known waves (the Langmuir wave and the Trivelpiece-Gould wave), plasmas reveal four wave solutions. New solutions exist due to both the separate consideration of spin-up and spin-down electrons and different occupation of spin-up and spin-down quantum states in equilibrium state of degenerate plasmas.

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Spin effect on parametric interactions of waves in magnetoplasmas

Cited by 16 publications

References 28 publications

Surface plasma wave in spin-polarized semiconductor quantum plasma

Surface plasma wave in spin-polarized semiconductor quantum plasma

Damped electrostatic ion acoustic solitary wave structures in quantum plasmas with Bohm potential and spin effects

Oblique propagation of longitudinal waves in magnetized spin-1/2 plasmas: Independent evolution of spin-up and spin-down electrons

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