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Potential well
About: Potential well is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 30812 citations.
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TL;DR: In this paper, a computationally efficient approach to calculate characteristics of quantum well excitons in an external electric field is introduced, which allows one to simultaneously obtain the field-induced shift and the broadening of the exciton resonance.
Abstract: A computationally efficient approach to calculate characteristics of quantum well excitons in an external electric field is introduced. The nonstationary nature of eigenstates in the presence of an electric field is taken into account with the help of the complex scaling approach. The method allows one to simultaneously obtain the field-induced shift and the broadening of the exciton resonance. The method is applied to a shallow quantum well in the regime of strong confinement. It is shown that in this case the field-induced broadening is strongly affected by the effective electron-hole interaction at small to moderate electric fields.
14 citations
TL;DR: An atmospheric nonthermal arc plasma source based on magnetically stabilized gliding arc discharge was developed for the continuous preparation of ultrafine amorphous silicon carbide (a-SiC) nanoparticles via hexamethyldisilane decomposition.
14 citations
TL;DR: In this article, the ground-state physical properties of a two-dimensional quantum dot with N interacting electrons confined in a power-law external potential are numerically determined by the Thomas-Fermi approximation.
13 citations
TL;DR: In this article, the energy levels of the electron and hole states of the Mn-doped ZnO quantum wires (x=0.0018) were investigated in the presence of the external magnetic field.
Abstract: Based on the effective-mass model and the mean-field approximation, we investigate the energy levels of the electron and hole states of the Mn-doped ZnO quantum wires (x=0.0018) in the presence of the external magnetic field. It is found that either twofold degenerated electron or fourfold degenerated hole states split in the field. The splitting energy is about 100 times larger than those of undoped cases. There is a dark exciton effect when the radius R is smaller than 16.6 nm, and it is independent of the effective doped Mn concentration. The lowest state transitions split into six Zeeman components in the magnetic field, four sigma(+/-) and two pi polarized Zeeman components, their splittings depend on the Mn-doped concentration, and the order of pi and sigma(+/-) polarized Zeeman components is reversed for thin quantum wires (R < 2.3 nm) due to the quantum confinement effect.
13 citations
TL;DR: In this paper, a quasi-one-dimensional excitons in quantum wires were investigated using an isotropic Coulomb potential of the type: V(r)=−(1/ar), where a is a specified length parameter of the confined region.
Abstract: Quasi-one-dimensional excitons in quantum wires are investigated using an isotropic “hard” Coulomb potential of the type: V(r)=−(1/ar), where a is a specified length parameter of the confined region. Using the virial theorem, this interaction potential gives a constant ratio of 34 for the exciton binding energy to its potential energy, a result that has been recently verified for various configurations of GaAs/AlxGa1−xAs quantum wires. We utilize this simple model to show a semiempirical approach to determine the exciton binding energy in quantum wires with transverse cross sections of widely used geometrical shapes. The significance of channel points and strong curvatures in the cross section of quantum wires is highlighted.
13 citations