Exciton states and interband absorption of cylindrical quantum dot with Morse confining potential

Autor:	T. V. Kotanjyan, Eduard M. Kazaryan, David B. Hayrapetyan, H. Kh. Tevosyan
Rok vydání:	2015
Předmět:	Physics Condensed matter physics Exciton Electron Condensed Matter Physics Quantization (physics) Distribution function Quantum dot Quantum mechanics Attenuation coefficient General Materials Science Electrical and Electronic Engineering Quantum Morse potential
Zdroj:	Superlattices and Microstructures. 78:40-49
ISSN:	0749-6036
DOI:	10.1016/j.spmi.2014.11.025
Popis:	In this paper the exciton and electron sates in cylindrical quantum dot with Morse potential made of GaAs are studied. For the regime of strong size quantization, energy spectrum with the parabolic approximation case are compared. For strong and weak size quantization regimes analytic expressions for the particle energy spectrum, absorption coefficient and dependencies of effective threshold frequencies of absorption on the geometrical parameters quantum dot are obtained. For the intermediate size quantization regime the problem solved in the framework of variation method. The selection rules corresponding to different transitions between quantum levels are found. The size dispersion distribution of growing quantum dots by the radius and height by two experimentally realizing distribution functions have been taken into account. Distribution functions of Gauss, Lifshits-Slezov have been considered.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::743f2b6ae9ecd6159b059ae988868340 https://doi.org/10.1016/j.spmi.2014.11.025 Zobrazit plný text záznamu Full Text from ScienceDirect