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Incipient singlet-triplet states in a hybrid mesoscopic system

Yan, C; Kumar, S; Pepper, M; See, P; Farrer, I; Ritchie, D; Griffiths, J; (2018) Incipient singlet-triplet states in a hybrid mesoscopic system. Physical Review B (Condensed Matter) , 97 , Article 241302. 10.1103/PhysRevB.97.241302. Green open access

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Abstract

In the present work we provide an easily accessible way to achieve the singlet-triplet Kondo effect in a hybrid system consisting of a quantum point contact (QPC) coupled to an electronic cavity. We show that by activating the coupling between the QPC and cavity, a zero-bias anomaly occurs in a low conductance regime, a coexistence of zero-bias and finite-bias anomaly (FBA) in a medium conductance regime, and a FBA-only anomaly in a high conductance regime. The latter two observations are due to the singlet-triplet Kondo effect.

Type: Article
Title: Incipient singlet-triplet states in a hybrid mesoscopic system
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevB.97.241302
Publisher version: http://dx.doi.org/10.1103/PhysRevB.97.241302
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: cond-mat.mes-hall, cond-mat.mes-hall
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/10051355
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