Effect of the charge and spin of a lateral quantum dot on a wire current

The transport properties of a quantum wire interacting with a lateral two-level quantum dot are presented. A cluster including the dot and its vicinity is diagonalized and embedded into the rest of the system. The result is numerically exact for T = 0. The wire conductance is calculated for all diff...

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Autores principales: Davidovich, M.A., Büsser, C.A., Anda, E.V., Chiappe, G.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03701972_v232_n1_p66_Davidovich
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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_03701972_v232_n1_p66_Davidovich2023-10-03T15:28:34Z Effect of the charge and spin of a lateral quantum dot on a wire current Davidovich, M.A. Büsser, C.A. Anda, E.V. Chiappe, G. The transport properties of a quantum wire interacting with a lateral two-level quantum dot are presented. A cluster including the dot and its vicinity is diagonalized and embedded into the rest of the system. The result is numerically exact for T = 0. The wire conductance is calculated for all different states of charge and spin of the quantum dot. We find that the Kondo correlation is stronger for a dot spin SD ≈ 1 than for SD ≈ 1/2. In both cases the wire current is totally quenched by the Kondo effect. When the dot is in the mixed-valence regime and 1/2 ≲ SD ≲ 1, the wire conductance is partially quenched except in a very small region of the gate potential where it reaches the maximum value e2/h. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03701972_v232_n1_p66_Davidovich
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The transport properties of a quantum wire interacting with a lateral two-level quantum dot are presented. A cluster including the dot and its vicinity is diagonalized and embedded into the rest of the system. The result is numerically exact for T = 0. The wire conductance is calculated for all different states of charge and spin of the quantum dot. We find that the Kondo correlation is stronger for a dot spin SD ≈ 1 than for SD ≈ 1/2. In both cases the wire current is totally quenched by the Kondo effect. When the dot is in the mixed-valence regime and 1/2 ≲ SD ≲ 1, the wire conductance is partially quenched except in a very small region of the gate potential where it reaches the maximum value e2/h.
format JOUR
author Davidovich, M.A.
Büsser, C.A.
Anda, E.V.
Chiappe, G.
spellingShingle Davidovich, M.A.
Büsser, C.A.
Anda, E.V.
Chiappe, G.
Effect of the charge and spin of a lateral quantum dot on a wire current
author_facet Davidovich, M.A.
Büsser, C.A.
Anda, E.V.
Chiappe, G.
author_sort Davidovich, M.A.
title Effect of the charge and spin of a lateral quantum dot on a wire current
title_short Effect of the charge and spin of a lateral quantum dot on a wire current
title_full Effect of the charge and spin of a lateral quantum dot on a wire current
title_fullStr Effect of the charge and spin of a lateral quantum dot on a wire current
title_full_unstemmed Effect of the charge and spin of a lateral quantum dot on a wire current
title_sort effect of the charge and spin of a lateral quantum dot on a wire current
url http://hdl.handle.net/20.500.12110/paper_03701972_v232_n1_p66_Davidovich
work_keys_str_mv AT davidovichma effectofthechargeandspinofalateralquantumdotonawirecurrent
AT busserca effectofthechargeandspinofalateralquantumdotonawirecurrent
AT andaev effectofthechargeandspinofalateralquantumdotonawirecurrent
AT chiappeg effectofthechargeandspinofalateralquantumdotonawirecurrent
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