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Pressure effect on an exciton in a wurtzite AlN/GaN/AlN spherical core/shell quantum dot

Published online by Cambridge University Press:  25 April 2018

N. Aghoutane ,
M. El-Yadri ,
E. Feddi ,
F. Dujardin ,
M. Sadoqi  and
G. Long Open the ORCID record for G. Long [Opens in a new window]
N. Aghoutane
Affiliation:
LaMCScI, Group of Optoelectronic of Semiconductors and Nanomaterials, ENSET, Mohammed V University in Rabat, Rabat 10100, Morocco
M. El-Yadri
Affiliation:
LaMCScI, Group of Optoelectronic of Semiconductors and Nanomaterials, ENSET, Mohammed V University in Rabat, Rabat 10100, Morocco
E. Feddi*
Affiliation:
LaMCScI, Group of Optoelectronic of Semiconductors and Nanomaterials, ENSET, Mohammed V University in Rabat, Rabat 10100, Morocco
F. Dujardin
Affiliation:
LCP-A2MC, Institut de Chimie, Physique et Matériaux, Université de Lorraine, F-57000 Metz, France
M. Sadoqi
Affiliation:
Department of Physics, St. John's College of Liberal Arts and Sciences, St. John's University, Jamaica, NY 11439, USA Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Jamaica, NY 11439, USA
G. Long*
Affiliation:
Department of Physics, St. John's College of Liberal Arts and Sciences, St. John's University, Jamaica, NY 11439, USA
*
Address all correspondence to Elmustapha Feddi and Gen Long at e.feddi@um5s.net.ma and longg@stjohns.edu
Address all correspondence to Elmustapha Feddi and Gen Long at e.feddi@um5s.net.ma and longg@stjohns.edu
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Abstract

We have studied the effect of hydrostatic pressure on the confined exciton in a spherical core–shell quantum dot. Using a simple variational approach under the framework of effective mass approximation, we have computed the excitonic binding energy as a function of the shell thickness under the applied hydrostatic pressure. Our results show that the ground state binding energy of exciton depends greatly on the shell thickness, which tends to the two-dimensional limit of 4RX, when the ratio a/b tends to unity. The numerical calculations also suggest that the applied hydrostatic pressure favors the attraction between electrons and holes so the excitonic binding energy increases when pressure increases.

Type
Research Letters
Information
MRS Communications , Volume 8 , Issue 2 , June 2018 , pp. 527 - 532
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Copyright
Copyright © Materials Research Society 2018 

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