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ELECTRON PROPERTIES IN DIRECTED SELF-ASSEMBLY GE/SIC/SI QUANTUM DOTS

Yang, Dongyue (2014) ELECTRON PROPERTIES IN DIRECTED SELF-ASSEMBLY GE/SIC/SI QUANTUM DOTS. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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Abstract

Artificially ordered semiconductor quantum dot (QD) patterns may be used to implement functionalities such as spintronic bandgap systems, quantum simulation and quantum computing, by manipulating the interaction between confined carriers via direct exchange coupling. In this dissertation, magnetotransport measurements have been conducted to investigate the electronic orbital and spin states of directed self-assembly single- and few-Ge/SiC/Si QD devices, fabricated by a directed self-assembly QD growth technique developed by our group. Diamagnetic and Zeeman energy shifts of electrons confined around the QD have been observed from the magnetotransport experiments. A triple-barrier resonant tunneling model has been proposed to describe the electron and spin transport. The strength of the Coulomb interaction between electrons confined at neighboring QDs has been observed dependent on the dot separation, and represents an important parameter for fabricating QD-based molecules and artificial arrays, which may be implemented as building blocks for future quantum simulation and quantum computing architectures.

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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Yang, Dongyuetarzanydy@gmail.com
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairLevy, Jeremyjeremy.levy@levylab.org
Committee MemberLeibovich, Adamakl2@pitt.eduAKL2
Committee MemberD'Urso, Briandursobr@pitt.eduDURSOBR
Committee MemberDutt, Gurudevgdutt@pitt.eduGDUTT
Committee MemberChong, Lillianltchong@pitt.eduLTCHONG
Date: 30 May 2014
Date Type: Publication
Defense Date: 13 December 2013
Approval Date: 30 May 2014
Submission Date: 7 January 2014
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 104
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Physics
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: Ge/SiC/Si Quantum dot, Quantum dot molecular, Directed Self-Assembly, Magnetotransport, Diamagnetism
Related URLs:
Date Deposited: 30 May 2014 16:03
Last Modified: 15 Nov 2016 14:16
URI: http://d-scholarship.pitt.edu/id/eprint/20352

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