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A nonlinear, geometric Hall effect without magnetic field

The classical Hall effect, the traditional means of determining charge-carrier sign and density in a conductor, requires a magnetic field to produce transverse voltages across a current-carrying wire. We demonstrate a use of geometry to create transverse potentials along curved paths without any mag...

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Detalles Bibliográficos
Autores principales: Schade, Nicholas B., Schuster, David I., Nagel, Sidney R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: National Academy of Sciences 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6900534/
https://www.ncbi.nlm.nih.gov/pubmed/31740619
http://dx.doi.org/10.1073/pnas.1916406116
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author Schade, Nicholas B.
Schuster, David I.
Nagel, Sidney R.
author_facet Schade, Nicholas B.
Schuster, David I.
Nagel, Sidney R.
author_sort Schade, Nicholas B.
collection PubMed
description The classical Hall effect, the traditional means of determining charge-carrier sign and density in a conductor, requires a magnetic field to produce transverse voltages across a current-carrying wire. We demonstrate a use of geometry to create transverse potentials along curved paths without any magnetic field. These potentials also reflect the charge-carrier sign and density. We demonstrate this effect experimentally in curved wires where the transverse potentials are consistent with the doping and change polarity as we switch the carrier sign. In straight wires, we measure transverse potential fluctuations with random polarity demonstrating that the current follows a complex, tortuous path. This geometrically induced potential offers a sensitive characterization of inhomogeneous current flow in thin films.
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spelling pubmed-69005342019-12-12 A nonlinear, geometric Hall effect without magnetic field Schade, Nicholas B. Schuster, David I. Nagel, Sidney R. Proc Natl Acad Sci U S A Physical Sciences The classical Hall effect, the traditional means of determining charge-carrier sign and density in a conductor, requires a magnetic field to produce transverse voltages across a current-carrying wire. We demonstrate a use of geometry to create transverse potentials along curved paths without any magnetic field. These potentials also reflect the charge-carrier sign and density. We demonstrate this effect experimentally in curved wires where the transverse potentials are consistent with the doping and change polarity as we switch the carrier sign. In straight wires, we measure transverse potential fluctuations with random polarity demonstrating that the current follows a complex, tortuous path. This geometrically induced potential offers a sensitive characterization of inhomogeneous current flow in thin films. National Academy of Sciences 2019-12-03 2019-11-18 /pmc/articles/PMC6900534/ /pubmed/31740619 http://dx.doi.org/10.1073/pnas.1916406116 Text en Copyright © 2019 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/ https://creativecommons.org/licenses/by-nc-nd/4.0/This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) .
spellingShingle Physical Sciences
Schade, Nicholas B.
Schuster, David I.
Nagel, Sidney R.
A nonlinear, geometric Hall effect without magnetic field
title A nonlinear, geometric Hall effect without magnetic field
title_full A nonlinear, geometric Hall effect without magnetic field
title_fullStr A nonlinear, geometric Hall effect without magnetic field
title_full_unstemmed A nonlinear, geometric Hall effect without magnetic field
title_short A nonlinear, geometric Hall effect without magnetic field
title_sort nonlinear, geometric hall effect without magnetic field
topic Physical Sciences
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6900534/
https://www.ncbi.nlm.nih.gov/pubmed/31740619
http://dx.doi.org/10.1073/pnas.1916406116
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