Many-Body Theory of Proton-Generated Point Defects for Losses of Electron Energy and Photons in Quantum Wells

Abstract

The effects of point defects on the loss of either energies of ballistic electron beams or incident photons are studied by using a many-body theory in a multi-quantum-well system. This includes the defect-induced vertex correction to a bare polarization function of electrons within the ladder approximation as well as the intralayer and interlayer screening of defect-electron interactions are also taken into account in the random-phase approximation. The numerical results of defect effects on both energy-loss and optical-absorption spectra are presented and analyzed for various defect densities, number of quantum wells, and wave vectors. The diffusion-reaction equation is employed for calculating distributions of point defects in a layered structure. For completeness, the production rate for Frenkel-pair defects and their initial concentration are obtained based on atomic-level molecular-dynamics simulations. By combining defect-effect, diffusion-reaction and molecular-dynamics models proposed in this paper with a space-weather forecast model for the first time, it will be possible to enable specific designing for electronic and optoelectronic quantum devices that will be operated in space with radiation-hardening protection, and therefore, will effectively extend the lifetime of these satellite onboard electronic and optoelectronic devices.PACS numbers:

Tailoring plasmon excitations in $$\alpha -{\mathcal {T}}_3$$ armchair nanoribbons

“…The loss function, or the spectral function, is defined as through our calculated dielectric function , which has been utilized for graphically plotting or maximum values of with within the -plane 91 , 92 . On the other hand, the physically-defined loss function has been widely employed for describing power absorption of electron beam either parallel or perpendicular to the surface of an electronic system, where is the surface response function, related to the inverse dielectric-function matrix of electronic system 93 , 94 .

Figure 5 Plasmon excitations in nanoribbons.

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Tailoring plasmon excitations in α − T3 armchair nanoribbons

“…This flat band makes the α − T 3 topologically distinguishe from any other Dirac materials and appears very to be stable and robust against the presence of external fields [47][48][49] , disorder or defects. 50 A bandgap could also be generated in a dice lattice, 51 similar to the situation for graphene. Recently, Dirac semimetals also showed some interesting electronic properties, 52,53 although they closely resemble but not completely the same as those of α − T 3 .…”

Atomistic Band-Structure Computation for Investigating Coulomb Dephasing and Impurity Scattering Rates of Electrons in Graphene

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