Diamagnetic susceptibility of an off-center hydrogenic donor in pyramid-like and cone-like quantum dots

. In this study, the diamagnetic susceptibility of an off-center hydrogenic donor impurity confined by pyramid and cone-like quantum dots has been investigated. To this end, the finite-element method and the Arnoldi algorithm are used to find energy eigenvalues and eigenvectors of the systems. Then,...

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Bibliographic Details
Published in:European physical journal plus 2016-04, Vol.131 (4), p.121, Article 121
Main Authors: Avazzadeh, Z., Bahramiyan, H., Khordad, R., Mohammadi, S. A.
Format: Article
Language:English
Subjects:
Algorithms
Applied and Technical Physics
Atomic
Complex Systems
Condensed Matter Physics
Diamagnetism
Eigenvalues
Eigenvectors
Finite element method
Impurities
Mathematical and Computational Physics
Molecular
Optical and Plasma Physics
Physics
Physics and Astronomy
Quantum dots
Regular Article
Theoretical
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Summary:. In this study, the diamagnetic susceptibility of an off-center hydrogenic donor impurity confined by pyramid and cone-like quantum dots has been investigated. To this end, the finite-element method and the Arnoldi algorithm are used to find energy eigenvalues and eigenvectors of the systems. Then, the effect of impurity position and dot size has been investigated on the diamagnetic susceptibility. We have found that the diamagnetic susceptibility has a maximum around the impurity position 4nm for two quantum dots. The diamagnetic susceptibility in the cone-like quantum dot is smaller than that in the pyramid quantum dot. Numerical studies reveal that the diamagnetic susceptibility depends strongly on the geometry of the dot.
ISSN:2190-5444
2190-5444
DOI:10.1140/epjp/i2016-16121-8