Electronic border states in mesoscopic metallic cavities: Their contribution to the orbital magnetism

We present a study of persistent currents (PC) in mesoscopic two-dimensional metallic cavities. The cavity is simulated with a gate potential that constrains the electrons to be in the regions of the sample. Varying the profile of the gate potential we can change the size and the geometry of the sam...

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Detalles Bibliográficos
Autores principales:	Chiappe, G., Sánchez, M.J.
Formato:	JOUR
Materias:	Confining effects Persistent currents Electric currents Fermi level Magnetic flux Paramagnetism Persistent currents (PC) Metal analysis
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_09214526_v320_n1-4_p135_Chiappe
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_09214526_v320_n1-4_p135_Chiappe
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spelling	todo:paper_09214526_v320_n1-4_p135_Chiappe2023-10-03T15:45:07Z Electronic border states in mesoscopic metallic cavities: Their contribution to the orbital magnetism Chiappe, G. Sánchez, M.J. Confining effects Persistent currents Electric currents Fermi level Magnetic flux Paramagnetism Persistent currents (PC) Metal analysis We present a study of persistent currents (PC) in mesoscopic two-dimensional metallic cavities. The cavity is simulated with a gate potential that constrains the electrons to be in the regions of the sample. Varying the profile of the gate potential we can change the size and the geometry of the sample. We study non-single connected samples for which the typical current, I(typ), is substantially enhanced at half-filling, due to the existence of electronic border states near the Fermi level for this filling. These states have a large angular momentum and its response to the magnetic external flux is paramagnetic. We discuss the relevance of our results in relation to the, as yet, unexplained discrepancies between measurements of large values of PC in mesoscopic metallic rings and theoretical predictions. © 2002 Elsevier Science B.V. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09214526_v320_n1-4_p135_Chiappe
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Confining effects Persistent currents Electric currents Fermi level Magnetic flux Paramagnetism Persistent currents (PC) Metal analysis
spellingShingle	Confining effects Persistent currents Electric currents Fermi level Magnetic flux Paramagnetism Persistent currents (PC) Metal analysis Chiappe, G. Sánchez, M.J. Electronic border states in mesoscopic metallic cavities: Their contribution to the orbital magnetism
topic_facet	Confining effects Persistent currents Electric currents Fermi level Magnetic flux Paramagnetism Persistent currents (PC) Metal analysis
description	We present a study of persistent currents (PC) in mesoscopic two-dimensional metallic cavities. The cavity is simulated with a gate potential that constrains the electrons to be in the regions of the sample. Varying the profile of the gate potential we can change the size and the geometry of the sample. We study non-single connected samples for which the typical current, I(typ), is substantially enhanced at half-filling, due to the existence of electronic border states near the Fermi level for this filling. These states have a large angular momentum and its response to the magnetic external flux is paramagnetic. We discuss the relevance of our results in relation to the, as yet, unexplained discrepancies between measurements of large values of PC in mesoscopic metallic rings and theoretical predictions. © 2002 Elsevier Science B.V. All rights reserved.
format	JOUR
author	Chiappe, G. Sánchez, M.J.
author_facet	Chiappe, G. Sánchez, M.J.
author_sort	Chiappe, G.
title	Electronic border states in mesoscopic metallic cavities: Their contribution to the orbital magnetism
title_short	Electronic border states in mesoscopic metallic cavities: Their contribution to the orbital magnetism
title_full	Electronic border states in mesoscopic metallic cavities: Their contribution to the orbital magnetism
title_fullStr	Electronic border states in mesoscopic metallic cavities: Their contribution to the orbital magnetism
title_full_unstemmed	Electronic border states in mesoscopic metallic cavities: Their contribution to the orbital magnetism
title_sort	electronic border states in mesoscopic metallic cavities: their contribution to the orbital magnetism
url	http://hdl.handle.net/20.500.12110/paper_09214526_v320_n1-4_p135_Chiappe
work_keys_str_mv	AT chiappeg electronicborderstatesinmesoscopicmetalliccavitiestheircontributiontotheorbitalmagnetism AT sanchezmj electronicborderstatesinmesoscopicmetalliccavitiestheircontributiontotheorbitalmagnetism
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Electronic border states in mesoscopic metallic cavities: Their contribution to the orbital magnetism

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