NDLI: Multiphysics effects and electronic properties of anisotropic semiconductor quantum dots

Content Provider	IEEE Xplore Digital Library
Author	Prabhakar, S. Melnik, R.
Copyright Year	2013
Description	Author affiliation: M2NeT Lab., Wilfrid Laurier Univ., Waterloo, ON, Canada (Prabhakar, S.; Melnik, R.)
Abstract	In this paper we analyze a number of important coupled effects in semiconductor quantum dots with multiband models, including magneto-electromechanical coupling. We also demonstrate that the Rashba spin-orbit coupling may provide appreciable contributions to electronic properties of quantum dots by focusing on gate-controlled electron spins in quantum dots.In particular, we analyze the properties of anisotropic semiconductor quantum dots formed in the conduction band in the presence of the magnetic field. For this case, we formulate the Kane-type model and based on it we study the properties of dots by using both analytical and finite element techniques. It is shown that that in semiconductor quantum dots, the electron spin states in the phonon-induced spin-flip rate can be manipulated with the application of externally applied anisotropic gate potentials. The spin flip rates can be enhanced by such potentials, which can also reduce the level crossing points to lower quantum dot radii. We provide numerical examples providing further insight into these new findings where it is evident that these observed effects are due to the suppression of the g-factor towards bulk crystal. Based on these findings, the phonon induced spin-flip rate can be controlled through the application of spin-orbit coupling. Other coupled effects that affect the electronic properties of quantum dots are also discussed.
Sponsorship	IEEE Ukraine Sect.
Starting Page	217
Ending Page	219
File Size	427886
Page Count	3
File Format	PDF
ISBN	9781467346696
e-ISBN	9781467346726
DOI	10.1109/ELNANO.2013.6552020
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-04-16
Publisher Place	Ukraine
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electric potential Low dimensional nanostructures Electromechanics Quantum dots Phonons Quantum-continuum coupling Couplings Finite element method Coupled multiphysics effects Electron-phonon coupling Band structure calculations Logic gates Perpendicular magnetic anisotropy
Content Type	Text
Resource Type	Article

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