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Investigation of local breakdown of the Quantum Hall effect in graphene probed with invasive metal contacts
Descriptive
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Text
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Title
Investigation of local breakdown of the Quantum Hall effect in graphene probed with invasive metal contacts
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ETD_2160
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http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051810
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eng
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theses
Subject
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Topic
Physics and Astronomy
Subject
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(authority = ETD-LCSH)
Topic
Quantum Hall effect
Subject
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(authority = ETD-LCSH)
Topic
Graphene
Abstract
We investigate the local breakdown of the Quantum Hall Effect (QHE) effect in a graphene device caused by the constraints of the Hall bar geometry and finite size of the sample. First to account for principal features of the data we use a multi-carrier model that simulates the transverse and longitudinal resistance of doped samples in low magnetic fields. This model however can not reproduce the reduction of Hall voltage measured in the vicinity of the current leads. Therefore we introduce a second model which describes the effect of distribution of electric field in the device, giving a reasonable scenario that can explain our experimental data and deviations from the case of perfect geometry. We conclude that the existence of Hot Spots in two corners of the sample leads to the local break down of the QHE around this points.
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electronic resource
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ix, 68 p. : ill.
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M.S.
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Includes bibliographical references (p. 65-68)
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by Fabian Duerr
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Duerr
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Fabian
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1985-
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author
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Fabian Duerr
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Andrei
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Eva
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chair
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Eva Andrei
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Wu
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Weida
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internal member
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Advisory Committee
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Weida Wu
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Yuzbashyan
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Emil
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Emil Yuzbashyan
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Rutgers University
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Graduate School - New Brunswick
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2009
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2009-10
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xx
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Rutgers University Electronic Theses and Dissertations
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ETD
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Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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doi:10.7282/T35X2947
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ETD graduate
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Rights
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The author owns the copyright to this work
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Copyright protected
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Open
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Duerr
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Fabian
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Fabian Duerr
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Rutgers University. Graduate School - New Brunswick
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Author Agreement License
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I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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6737920
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