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Charge and Spin Transport in Low-Dimensional Materials

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Date Issued:
2017
Abstract/Description:
My research has been focused on two main areas. First, electronic transports in chiral carbonnanotubes in the presence of charged adatoms. To study such systems we employed recursiveGreens function technique to evaluate the conductance using the Landauer formula. Comparingwith the experimental data, we determined the effective amplitude and the range of scatteringpotentials. In addition, using a similar approach we explained qualitatively an unusual conductancefeature in a metallic carbon nanotube. The second part of my study was concerned to the dynamicalspin injection and spin currents in low-dimensional materials. We have developed an atomisticmodel to express the injected spin current in terms of the systems Greens function. The newformulation provides a framework to study the spin injection and relaxation of a system with anarbitrary structure.
Title: Charge and Spin Transport in Low-Dimensional Materials.
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Name(s): Ahmadi, Amin, Author
Mucciolo, Eduardo, Committee Chair
Del Barco, Enrique, Committee Member
Ishigami, Masa, Committee Member
Guo, Jing, Committee Member
University of Central Florida, Degree Grantor
Type of Resource: text
Date Issued: 2017
Publisher: University of Central Florida
Language(s): English
Abstract/Description: My research has been focused on two main areas. First, electronic transports in chiral carbonnanotubes in the presence of charged adatoms. To study such systems we employed recursiveGreens function technique to evaluate the conductance using the Landauer formula. Comparingwith the experimental data, we determined the effective amplitude and the range of scatteringpotentials. In addition, using a similar approach we explained qualitatively an unusual conductancefeature in a metallic carbon nanotube. The second part of my study was concerned to the dynamicalspin injection and spin currents in low-dimensional materials. We have developed an atomisticmodel to express the injected spin current in terms of the systems Greens function. The newformulation provides a framework to study the spin injection and relaxation of a system with anarbitrary structure.
Identifier: CFE0006550 (IID), ucf:51343 (fedora)
Note(s): 2017-05-01
Ph.D.
Sciences, Physics
Doctoral
This record was generated from author submitted information.
Subject(s): spin transport -- dynamical spin injection -- carbon nanotube -- graphene -- electronic transport -- recursive Green's function
Persistent Link to This Record: http://purl.flvc.org/ucf/fd/CFE0006550
Restrictions on Access: public 2017-05-15
Host Institution: UCF

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