| Téléchargement | - Voir la version finale : Spin-orbit enabled quantum transport channels in a two-hole double quantum dot (PDF, 5.6 Mio)
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| DOI | Trouver le DOI : https://doi.org/10.1103/PhysRevB.103.235310 |
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| Auteur | Rechercher : Bogan, Alex1; Rechercher : Studenikin, Sergei1; Rechercher : Korkusinski, Marek1Identifiant ORCID : https://orcid.org/0000-0002-2238-336X; Rechercher : Gaudreau, Louis1; Rechercher : Phoenix, Jason1; Rechercher : Zawadzki, Piotr1; Rechercher : Sachrajda, Andy1; Rechercher : Tracy, Lisa; Rechercher : Reno, John; Rechercher : Hargett, Terry |
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| Affiliation | - Conseil national de recherches du Canada. Technologies de sécurité et de rupture
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| Bailleur de fonds | Rechercher : Natural Sciences and Engineering Research Council of Canada; Rechercher : U.S. Department of Energy; Rechercher : Basic Energy Sciences |
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| Format | Texte, Article |
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| Sujet | magnetotransport; quantum transport; double quantum dots; III-V semiconductors; Hubbard model; Luttinger-Kohn model; quantum master equation; resistivity measurements |
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| Résumé | We analyze experimentally and theoretically the transport spectra of a gated lateral GaAs double quantum dot containing two holes. The strong spin-orbit interaction present in the hole subband lifts the Pauli spin blockade and allows to map out the complete spectra of the two-hole system. By performing measurements in both source-drain voltage directions, at different detunings and magnetic fields, we carry out quantitative fitting to a Hubbard two-site model accounting for the tunnel coupling to the leads and the spin-flip relaxation process. We extract the singlet-triplet gap and the magnetic field corresponding to the singlet-triplet transition in the double-hole ground state. Additionally, at the singlet-triplet transition we find a resonant enhancement (in the blockaded direction) and suppression of current (in the conduction direction). The current enhancement stems from the multiple resonance of two-hole levels, opening several conduction channels at once. The current suppression arises from the quantum interference of spin-conserving and spin-flipping tunneling processes. |
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| Date de publication | 2021-06-14 |
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| Maison d’édition | American Physical Society (APS) |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 1456a840-bdb5-4538-ba4e-7754ab50d0da |
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| Enregistrement créé | 2022-04-06 |
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| Enregistrement modifié | 2022-04-06 |
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