Excitons in a cylindrical GaAs Pöschl-Teller quantum dot

The exciton binding energy in a cylindrical quantum dot (QD) with Pöschl–Teller confining potential is studied with the use of the effective mass approximation and a variational calculation procedure. A GaAs prototype structure is particularly considered and both the spatially‐direct (DE) and spatia...

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Vydané v:	Physica Status Solidi (b) Ročník 248; číslo 6; s. 1412 - 1419
Hlavní autori:	Mora-Ramos, M. E., Barseghyan, M. G., Duque, C. A.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Berlin WILEY-VCH Verlag 01.06.2011 WILEY‐VCH Verlag Wiley-VCH
Predmet:	Approximation Condensed matter: electronic structure, electrical, magnetic, and optical properties Confining Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Exact sciences and technology Excitons GaAs Gallium arsenide Gallium arsenides Mathematical analysis Physics Quantum dots Quantum wells Quantum confinement Gallium arsenides Excitons Variational methods Quantum dots Binding energy Effective mass model Cylindrical shape Calculation methods
ISSN:	0370-1972, 1521-3951, 1521-3951
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Abstract	The exciton binding energy in a cylindrical quantum dot (QD) with Pöschl–Teller confining potential is studied with the use of the effective mass approximation and a variational calculation procedure. A GaAs prototype structure is particularly considered and both the spatially‐direct (DE) and spatially‐indirect (IE) exciton regimes are taken into account. We show that there is a significant effect of the Pöschl–Teller quantum well (QW) symmetry profile on the exciton properties in both configurations.
AbstractList	The exciton binding energy in a cylindrical quantum dot (QD) with Pöschl–Teller confining potential is studied with the use of the effective mass approximation and a variational calculation procedure. A GaAs prototype structure is particularly considered and both the spatially‐direct (DE) and spatially‐indirect (IE) exciton regimes are taken into account. We show that there is a significant effect of the Pöschl–Teller quantum well (QW) symmetry profile on the exciton properties in both configurations. The exciton binding energy in a cylindrical quantum dot (QD) with Poschl-Teller confining potential is studied with the use of the effective mass approximation and a variational calculation procedure. A GaAs prototype structure is particularly considered and both the spatially-direct (DE) and spatially-indirect (IE) exciton regimes are taken into account. We show that there is a significant effect of the Poschl-Teller quantum well (QW) symmetry profile on the exciton properties in both configurations.
Author	Barseghyan, M. G. Mora-Ramos, M. E. Duque, C. A.
Author_xml	– sequence: 1 givenname: M. E. surname: Mora-Ramos fullname: Mora-Ramos, M. E. email: memora@uaem.mx organization: Facultad de Ciencias, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, CP 62209 Cuernavaca, Morelos, México – sequence: 2 givenname: M. G. surname: Barseghyan fullname: Barseghyan, M. G. organization: Department of Solid State Physics, Yerevan State University, Al. Manookian 1, 0025 Yerevan, Armenia – sequence: 3 givenname: C. A. surname: Duque fullname: Duque, C. A. organization: Instituto de Física, Universidad de Antioquia, AA 1226, Medellín, Colombia
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Cites_doi	10.1590/S0103-97332006000600064 10.1140/epjb/e2006-00182-1 10.1103/PhysRevLett.94.057402 10.1103/PhysRevB.77.115441 10.1088/0022-3719/20/18/016 10.1088/0953-8984/13/35/324 10.1016/S0375-9601(00)00238-3 10.1063/1.2194124 10.1103/PhysRevB.71.205316 10.1103/PhysRevB.72.115340 10.1002/pssb.200642079 10.1103/PhysRevB.76.075303 10.1088/0953-8984/21/40/405801 10.1103/PhysRevLett.96.137401 10.1140/epjb/e2007-00136-1 10.1103/PhysRevB.47.1383 10.1103/PhysRevB.75.115303 10.1103/PhysRevB.26.1974 10.1103/PhysRevB.35.3009 10.15407/spqeo10.02.011 10.1103/PhysRevLett.84.733 10.1021/nl048511x 10.1016/j.jlumin.2004.09.009 10.1063/1.3088886 10.1103/PhysRevB.75.035303 10.1140/epjb/e2008-00242-6 10.1088/0253-6102/46/6/026
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Keywords	Quantum confinement Gallium arsenides Excitons Variational methods Quantum dots Binding energy Effective mass model Cylindrical shape Calculation methods
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Snippet	The exciton binding energy in a cylindrical quantum dot (QD) with Pöschl–Teller confining potential is studied with the use of the effective mass approximation... The exciton binding energy in a cylindrical quantum dot (QD) with Poschl-Teller confining potential is studied with the use of the effective mass approximation...
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SubjectTerms	Approximation Condensed matter: electronic structure, electrical, magnetic, and optical properties Confining Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Exact sciences and technology Excitons GaAs Gallium arsenide Gallium arsenides Mathematical analysis Physics Quantum dots Quantum wells
Title	Excitons in a cylindrical GaAs Pöschl-Teller quantum dot
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