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ELECTRON TRANSPORT IN SINGLE MOLECULE MAGNET TRANSISTORS AND OPTICAL LAMBDA TRANSITIONS IN THE NITROGEN-VACANCY CENTER IN DIAMOND
Title
ELECTRON TRANSPORT IN SINGLE MOLECULE MAGNET TRANSISTORS AND OPTICAL LAMBDA TRANSITIONS IN THE NITROGEN-VACANCY CENTER IN DIAMOND.
Creator
Gonzalez, Gabriel, Leuenberger, Michael, University of Central Florida
Abstract / Description
This thesis presents some theoretical studies dealing with quantum interference effects in electron transport through single molecule magnet transistors and a study on optical non-conserving spin transitions in the Nitrogen-vacancy center in diamond. The thesis starts with a brief general introduction to the physics of quantum transport through single electron transistors. Afterwards, the main body of the thesis is divided into three studies: (i) In chapter (2) we describe the properties of...
Show moreThis thesis presents some theoretical studies dealing with quantum interference effects in electron transport through single molecule magnet transistors and a study on optical non-conserving spin transitions in the Nitrogen-vacancy center in diamond. The thesis starts with a brief general introduction to the physics of quantum transport through single electron transistors. Afterwards, the main body of the thesis is divided into three studies: (i) In chapter (2) we describe the properties of single molecule magnets and the Berry phase interference present in this nanomagnets. We then propose a way to detect quantum interference experimentally in the current of a single molecule magnet transistor using polarized leads. We apply our theoretical results to the newly synthesized nanomagnet Ni4. (ii) In chapter (3) we review the Kondo effect and present a microscopic derivation of the Kondo Hamiltonian suitable for full and half integer spin nanomagnets. We then calculate the conductance of the single molecule magnet transistor in the presence of the Kondo effect for Ni4 and show how the Berry phase interference becomes temperature dependent. (iii) We conclude in chapter (4) with a theoretical study of the single Nitrogen vacancy defect center in diamond. We show that it is possible to have spin non-conserving transitions via the hyperfine interaction and propose a way to write and read quantum information using circularly polarized light by means of optical Lambda transitions in this solid state system.
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Date Issued
2009
Identifier
CFE0002740, ucf:48179
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0002740
Hidden Scars: The Art of PTSD
Title
Hidden Scars: The Art of PTSD.
Creator
Gonzalez, Gabriel, Price, Mark, Kovach, Keith, Raimundi-Ortiz, Wanda, University of Central Florida
Abstract / Description
Through the use of mixed media, I explore imagery that reveals the trauma of returning combat veterans, of which I am one, as we try to reintegrate into a society that does not understand the war that still lingers within us. In my work, I depict emotional disturbances that are related to my personal encounters with war.My working process starts by referencing mainstream media imagery, which I juxtapose against harsh images inspired by veterans' drug and alcohol use, trauma and death.My black...
Show moreThrough the use of mixed media, I explore imagery that reveals the trauma of returning combat veterans, of which I am one, as we try to reintegrate into a society that does not understand the war that still lingers within us. In my work, I depict emotional disturbances that are related to my personal encounters with war.My working process starts by referencing mainstream media imagery, which I juxtapose against harsh images inspired by veterans' drug and alcohol use, trauma and death.My black-and-white pixelated paintings feature the fragmented memories of a hostile combat environment, and although (")Out of My Mind(") depicts the chaotic emotions associated with PTSD, my whimsical style of illustration suggests a detachment from reality.Whether we call it shell shock, battle fatigue or PTSD, the war-related disorder is real. I want society to be aware of the hidden scars that our veterans carry with them. I do not anticipate my subject matter changing any time soon.
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Date Issued
2013
Identifier
CFE0004684, ucf:49857
Format
Document (PDF)
PURL
http://purl.flvc.org/ucf/fd/CFE0004684