Current-induced switching in transport through anisotropic magnetic molecules

Anisotropic single-molecule magnets may be thought of as molecular switches, with possible applications to molecular spintronics. In this paper, we consider current-induced switching in single-molecule junctions containing an anisotropic magnetic molecule. We assume that the carriers interact with t...

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Autores principales: Bode, N., Arrachea, L., Lozano, G.S., Nunner, T.S., Von Oppen, F.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10980121_v85_n11_p_Bode
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_10980121_v85_n11_p_Bode2023-10-03T16:06:19Z Current-induced switching in transport through anisotropic magnetic molecules Bode, N. Arrachea, L. Lozano, G.S. Nunner, T.S. Von Oppen, F. Anisotropic single-molecule magnets may be thought of as molecular switches, with possible applications to molecular spintronics. In this paper, we consider current-induced switching in single-molecule junctions containing an anisotropic magnetic molecule. We assume that the carriers interact with the magnetic molecule through the exchange interaction and focus on the regime of high currents in which the molecular spin dynamics is slow compared to the time which the electrons spend on the molecule. In this limit, the molecular spin obeys a nonequilibrium Langevin equation which takes the form of a generalized Landau-Lifshitz-Gilbert equation and which we derive microscopically by means of a nonequilibrium Born-Oppenheimer approximation. We exploit this Langevin equation to identify the relevant switching mechanisms and to derive the current-induced switching rates. As a by-product, we also derive S-matrix expressions for the various torques entering into the Landau-Lifshitz-Gilbert equation which generalize previous expressions in the literature to nonequilibrium situations. © 2012 American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_10980121_v85_n11_p_Bode
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Anisotropic single-molecule magnets may be thought of as molecular switches, with possible applications to molecular spintronics. In this paper, we consider current-induced switching in single-molecule junctions containing an anisotropic magnetic molecule. We assume that the carriers interact with the magnetic molecule through the exchange interaction and focus on the regime of high currents in which the molecular spin dynamics is slow compared to the time which the electrons spend on the molecule. In this limit, the molecular spin obeys a nonequilibrium Langevin equation which takes the form of a generalized Landau-Lifshitz-Gilbert equation and which we derive microscopically by means of a nonequilibrium Born-Oppenheimer approximation. We exploit this Langevin equation to identify the relevant switching mechanisms and to derive the current-induced switching rates. As a by-product, we also derive S-matrix expressions for the various torques entering into the Landau-Lifshitz-Gilbert equation which generalize previous expressions in the literature to nonequilibrium situations. © 2012 American Physical Society.
format JOUR
author Bode, N.
Arrachea, L.
Lozano, G.S.
Nunner, T.S.
Von Oppen, F.
spellingShingle Bode, N.
Arrachea, L.
Lozano, G.S.
Nunner, T.S.
Von Oppen, F.
Current-induced switching in transport through anisotropic magnetic molecules
author_facet Bode, N.
Arrachea, L.
Lozano, G.S.
Nunner, T.S.
Von Oppen, F.
author_sort Bode, N.
title Current-induced switching in transport through anisotropic magnetic molecules
title_short Current-induced switching in transport through anisotropic magnetic molecules
title_full Current-induced switching in transport through anisotropic magnetic molecules
title_fullStr Current-induced switching in transport through anisotropic magnetic molecules
title_full_unstemmed Current-induced switching in transport through anisotropic magnetic molecules
title_sort current-induced switching in transport through anisotropic magnetic molecules
url http://hdl.handle.net/20.500.12110/paper_10980121_v85_n11_p_Bode
work_keys_str_mv AT boden currentinducedswitchingintransportthroughanisotropicmagneticmolecules
AT arracheal currentinducedswitchingintransportthroughanisotropicmagneticmolecules
AT lozanogs currentinducedswitchingintransportthroughanisotropicmagneticmolecules
AT nunnerts currentinducedswitchingintransportthroughanisotropicmagneticmolecules
AT vonoppenf currentinducedswitchingintransportthroughanisotropicmagneticmolecules
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