Wake effects and stopping power for a charged particle moving above two-dimensional quantum electron gases

Li, Chunzhi; Song, Yuan-Hong; Wang, You‐Nian

doi:10.1016/j.physleta.2008.04.034

Cited by 20 publications

(7 citation statements)

References 22 publications

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“…At equilibrium, 2DQEG density satisfies the relation n i � n e � n 0 [32]. Considering that the quantum effect is more significant in the high-density electron gas, we take the equilibrium density of electrons and ions as n 0 � 5.69 × 10 15 cm −2 , which is the density of aluminum surface [5].…”

Section: Physic Modelmentioning

confidence: 99%

“…Accompanied by the two-dimensional quantum electron gases (2DQEG) is confirmed to exist on the surface of the metals and semiconductor heterostructures. e interaction between charged particles and plasma targets has attracted a lot of attention in surface physics [1][2][3][4][5][6]. e incident particles can also be used as probes to detect the properties of 2DQEG, or as a powerful tool of surface character modification.…”

Section: Introductionmentioning

confidence: 99%

“…e stopping power of charged particles can be modulated by the incident velocity of charged particles [5], the amount of charge of charged particles, the density of plasma targets [5], varying altitude parameter between charged particles and 2DQEG [4,5,29], the external magnetic field [30,31], the spin effects [32], and so on.…”

Section: Introductionmentioning

confidence: 99%

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Stopping Power Modulation by Pump Waves of Charged Particles Moving above Two-Dimensional Electron Gases

Yang

Zhang

et al. 2021

Laser Part. Beams

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The perturbation electron density and stopping power caused by the movement of charged particles above two-dimensional quantum electron gases (2DQEG) have been studied in numerous works using the quantum hydrodynamic (QHD) theory. In this paper, the QHD is modified by introducing the two-dimensional electron exchange-correlation potential at high density V x c 2 DH and the pump wave modulations. Based on the modified QHD, the perturbation electron density and stopping power are calculated for pump waves with various parameters. The results show that the stopping power values are more accurate after considering V x c 2 DH . Under the modulation of pump waves with the wavelength from 0.1 nm to 0.1 cm , the perturbation electron density of 2DQEG and the stopping power of charged particles show periodic changes. Under the modulation of pump waves with λ = 1.76 × 10 − 4 cm and Φ 0 = 2 × 10 10 e / λ f , the average stopping power with respect to the time phase θ becomes negative, which means that the charged particles will gain energy and can be accelerated. This is a new phenomenon in the fields of 2DQEG and of great significance in surface physics and surface modification in nanoelectronic devices with beam matter interactions.

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Section: Physic Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stopping Power Modulation by Pump Waves of Charged Particles Moving above Two-Dimensional Electron Gases

Yang

Zhang

et al. 2021

Laser Part. Beams

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“…The propagation of surface waves in planar two‐dimensional (2D) electron‐ion plasmas has been a subject of increased interest in the past years [ 1–4 ] with the development of new materials in which electron‐ion plasmas are confined within 2D configuration, for example, in metallic layers characterized by a parabolic energy band [ 5–7 ] and single‐layer graphene [8]. The two plasma waves of such plasmas that have been studied include plasmon (high‐frequency) and ion‐acoustic (low‐frequency) waves.…”

Section: Introductionmentioning

confidence: 99%

Energy relations of plasma waves in planar two‐dimensional electron‐ion plasmas

Moradi

2020

Contributions to Plasma Physics

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A derivation of the energy densities and power flows of plasma waves in a planar two‐dimensional electron‐ion plasma is presented through a simple approach. In this method, the response of an external current density introduced into the system is determined by a so‐called dispersion function. The advantage of the dispersion function is that it yields not only the dispersion relations of both plasmon (high‐frequency) and ion‐acoustic (low‐frequency) waves of the system, but expressions for the energy relations as well.

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“…Recently, this model has been used for many studies such as the problems in magnetized plasmas, 24 the research for the quantum dust acoustic wave, 25 and the investigation of the stopping power and wake potential. 26,27 In the above references, a case of a completely degenerate EG was considered. It is well known that for such a kind of systems the internal interaction and the temperature can significantly influence the properties of the EG.…”

Section: Introductionmentioning

confidence: 99%

Stopping power for a charged particle moving through three-dimensional nonideal finite-temperature electron gases

2011

Self Cite

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We investigate the interaction of a charged particle with nonideal 3D electron gases by using the quantum hydrodynamic (QHD) theory. The stopping power for a nonideal electron gas at a finite-temperature has been theoretically analyzed and numerically calculated. In our calculation, the impact of nonideality and temperature on stopping power is stressed and clearly presented. The QHD dielectric function is obtained and compared to random-phase approximation result. It is shown that the QHD theory can properly describe the stopping power for higher particle velocities greater than the Bohr velocity.

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Wake effects and stopping power for a charged particle moving above two-dimensional quantum electron gases

Cited by 20 publications

References 22 publications

Stopping Power Modulation by Pump Waves of Charged Particles Moving above Two-Dimensional Electron Gases

Stopping Power Modulation by Pump Waves of Charged Particles Moving above Two-Dimensional Electron Gases

Energy relations of plasma waves in planar two‐dimensional electron‐ion plasmas

Stopping power for a charged particle moving through three-dimensional nonideal finite-temperature electron gases

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