Topology-induced many body effects in hydrogenated Pt nanocontacts

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It is shown that recent experimental data on transport through Pt nanocontacts in the presence of hydrogen admit an explanation in terms of topological and electronic correlation grounds. A model Hamiltonian, which incorporates two orbitals on Pt atoms, a single orbital on hydrogens, and the on-site...

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Autores principales: Chiappe, G., Louis, E., Anda, E.V., Verges, J.A.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_10980121_v71_n24_p_Chiappe
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_10980121_v71_n24_p_Chiappe
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spelling todo:paper_10980121_v71_n24_p_Chiappe2023-10-03T16:05:53Z Topology-induced many body effects in hydrogenated Pt nanocontacts Chiappe, G. Louis, E. Anda, E.V. Verges, J.A. It is shown that recent experimental data on transport through Pt nanocontacts in the presence of hydrogen admit an explanation in terms of topological and electronic correlation grounds. A model Hamiltonian, which incorporates two orbitals on Pt atoms, a single orbital on hydrogens, and the on-site Coulomb repulsion on the H atoms, is solved exactly, and connected to Pt leads described by a Bethe lattice. When two weakly coupled H atoms are placed between the Pt electrodes transversally to the transport direction (as recently suggested) many body effects related to the symmetry of the Pt-H couplings, stabilize the conductance around one quantum with a single channel contributing to the current, in agreement with the experiments. © 2005 The 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_v71_n24_p_Chiappe
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description It is shown that recent experimental data on transport through Pt nanocontacts in the presence of hydrogen admit an explanation in terms of topological and electronic correlation grounds. A model Hamiltonian, which incorporates two orbitals on Pt atoms, a single orbital on hydrogens, and the on-site Coulomb repulsion on the H atoms, is solved exactly, and connected to Pt leads described by a Bethe lattice. When two weakly coupled H atoms are placed between the Pt electrodes transversally to the transport direction (as recently suggested) many body effects related to the symmetry of the Pt-H couplings, stabilize the conductance around one quantum with a single channel contributing to the current, in agreement with the experiments. © 2005 The American Physical Society.
format JOUR
author Chiappe, G.
Louis, E.
Anda, E.V.
Verges, J.A.
spellingShingle Chiappe, G.
Louis, E.
Anda, E.V.
Verges, J.A.
Topology-induced many body effects in hydrogenated Pt nanocontacts
author_facet Chiappe, G.
Louis, E.
Anda, E.V.
Verges, J.A.
author_sort Chiappe, G.
title Topology-induced many body effects in hydrogenated Pt nanocontacts
title_short Topology-induced many body effects in hydrogenated Pt nanocontacts
title_full Topology-induced many body effects in hydrogenated Pt nanocontacts
title_fullStr Topology-induced many body effects in hydrogenated Pt nanocontacts
title_full_unstemmed Topology-induced many body effects in hydrogenated Pt nanocontacts
title_sort topology-induced many body effects in hydrogenated pt nanocontacts
url http://hdl.handle.net/20.500.12110/paper_10980121_v71_n24_p_Chiappe
work_keys_str_mv AT chiappeg topologyinducedmanybodyeffectsinhydrogenatedptnanocontacts
AT louise topologyinducedmanybodyeffectsinhydrogenatedptnanocontacts
AT andaev topologyinducedmanybodyeffectsinhydrogenatedptnanocontacts
AT vergesja topologyinducedmanybodyeffectsinhydrogenatedptnanocontacts
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