Kondo resonance effect on persistent currents through a quantum dot in a mesoscopic ring

The persistent current through a quantum dot inserted in a mesoscopic ring of length L is studied. A cluster representing the dot and its vicinity is exactly diagonalized and embedded into the rest of the ring. It is shown that the persistent current at the Kondo regime is enhanced relative to the c...

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Guardado en:
Detalles Bibliográficos
Publicado: 1999
Materias:
Current voltage characteristics
Electron resonance
Electronic density of states
Lattice constants
Mathematical models
Kondo resonance effect
Mesoscopic rings
Semiconductor quantum dots
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v82_n25_p5088_Ferrari
http://hdl.handle.net/20.500.12110/paper_00319007_v82_n25_p5088_Ferrari
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00319007_v82_n25_p5088_Ferrari
record_format dspace
spelling paper:paper_00319007_v82_n25_p5088_Ferrari2023-06-08T14:58:28Z Kondo resonance effect on persistent currents through a quantum dot in a mesoscopic ring Current voltage characteristics Electron resonance Electronic density of states Lattice constants Mathematical models Kondo resonance effect Mesoscopic rings Semiconductor quantum dots The persistent current through a quantum dot inserted in a mesoscopic ring of length L is studied. A cluster representing the dot and its vicinity is exactly diagonalized and embedded into the rest of the ring. It is shown that the persistent current at the Kondo regime is enhanced relative to the current flowing either when the dot is at resonance or along a perfect ring of the same length. In the Kondo regime, the current scales as L-1/2, unlike the L-1 scaling of a perfect ring. We discuss the possibility of detection of the Kondo effect by means of a persistent current measurement. © 1999 The American Physical Society. 1999 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v82_n25_p5088_Ferrari http://hdl.handle.net/20.500.12110/paper_00319007_v82_n25_p5088_Ferrari
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Current voltage characteristics
Electron resonance
Electronic density of states
Lattice constants
Mathematical models
Kondo resonance effect
Mesoscopic rings
Semiconductor quantum dots
spellingShingle Current voltage characteristics
Electron resonance
Electronic density of states
Lattice constants
Mathematical models
Kondo resonance effect
Mesoscopic rings
Semiconductor quantum dots
Kondo resonance effect on persistent currents through a quantum dot in a mesoscopic ring
topic_facet Current voltage characteristics
Electron resonance
Electronic density of states
Lattice constants
Mathematical models
Kondo resonance effect
Mesoscopic rings
Semiconductor quantum dots
description The persistent current through a quantum dot inserted in a mesoscopic ring of length L is studied. A cluster representing the dot and its vicinity is exactly diagonalized and embedded into the rest of the ring. It is shown that the persistent current at the Kondo regime is enhanced relative to the current flowing either when the dot is at resonance or along a perfect ring of the same length. In the Kondo regime, the current scales as L-1/2, unlike the L-1 scaling of a perfect ring. We discuss the possibility of detection of the Kondo effect by means of a persistent current measurement. © 1999 The American Physical Society.
title Kondo resonance effect on persistent currents through a quantum dot in a mesoscopic ring
title_short Kondo resonance effect on persistent currents through a quantum dot in a mesoscopic ring
title_full Kondo resonance effect on persistent currents through a quantum dot in a mesoscopic ring
title_fullStr Kondo resonance effect on persistent currents through a quantum dot in a mesoscopic ring
title_full_unstemmed Kondo resonance effect on persistent currents through a quantum dot in a mesoscopic ring
title_sort kondo resonance effect on persistent currents through a quantum dot in a mesoscopic ring
publishDate 1999
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v82_n25_p5088_Ferrari
http://hdl.handle.net/20.500.12110/paper_00319007_v82_n25_p5088_Ferrari
_version_ 1768542448372416512

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