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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...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
National Academy of Sciences
2019
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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. |
format | Online Article Text |
id | pubmed-6900534 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | National Academy of Sciences |
record_format | MEDLINE/PubMed |
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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