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New Concepts for Controlled Injection, Detection, and Manipulation of Spin in Quantum Dot Devices

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Technical Report,01 May 2013,30 Apr 2017

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Prairie View A and M University Prairie View United States

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We implemented a program of research and education that aims to understand various electronic and spintronic effects that occur in confined two-dimensional semiconductor quantum dot systems. Semiconductor quantum dots represent nanoscale systems made of few confined electrons. Their properties are size-dependent and of great interest to many disciplines. The interplay between quantum confinement, correlation effects, spin, electric andor magnetic field gives rise to very interesting physical phenomena. We considered new concepts for controlled injection, detection and manipulation of spin in various types of quantum dot devices. We investigated novel spintronic devices of high tunability that are built from coupled quantum dot systems of electrons with spin-orbit coupling. We elucidated the role plaid by an electric field on controlling the spin polarization and spin interference effects in confined nanoscale systems of electrons. We also studied the possible existence of novel quantum phases of confined electrons that may arise in presence of a magnetic field as well as the overall influence of size, shape and geometry on the properties of small finite systems of particles. The educational benefits are self-evident from the perspective of an HBCU institution. Participation and involvement of undergraduate students in the research has been very successful.

Subject Categories:

  • Quantum Theory and Relativity

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