Revisiting Coulomb diamond signatures in quantum Hall interferometers
| Autor: | N. Moreau, S. Faniel, F. Martins, L. Desplanque, X. Wallart, S. Melinte, V. Bayot, B. Hackens |
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| Přispěvatelé: | UCL - SST/IMCN/NAPS - Nanoscopic Physics, Institut de la matière condensée et des nanosciences / Institute of Condensed Matter and Nanosciences (IMCN), Université Catholique de Louvain = Catholic University of Louvain (UCL), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), EPItaxie et PHYsique des hétérostructures - IEMN (EPIPHY - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Institute of Information and Communication Technologies, Electronics and Applied Mathematics (ICTEAM), This work has been supported by FRFC Grants No. 2.4.546.08.F and No. 2.4503.12, FNRS Grant No. 1.5.044.07.F, by the FSR and ARC programs Stresstronics and NATURIST, by BELSPO (Interuniversity Attraction Pole IAP-6/42), and by the PNANO 2007 program of the ANR (MICATEC project). B.H. (research associate) and N.M. (FRIA fellowship) acknowledge financial support from the Fonds De La Recherche Scientifique - FNRS of Belgium., Renatech Network, ANR-07-NANO-0049,MICATEC,MICroscopie Avancée du Transport Electronique Cohérent(2007) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
[SPI]Engineering Sciences [physics]
Coulomb blockade Quantum transport Quantum Hall effect Condensed Matter - Mesoscale and Nanoscale Physics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) FOS: Physical sciences Aharonov-Bohm effect Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Integer quantum Hall effect Quantum interference effects |
| Zdroj: | Physical Review B, Vol. 105, no. 11, p. 115144 (2022) Physical Review B Physical Review B, 2022, 105 (11), pp.115144. ⟨10.1103/PhysRevB.105.115144⟩ |
| ISSN: | 2469-9950 2469-9969 |
| DOI: | 10.1103/PhysRevB.105.115144⟩ |
| Popis: | Coulomb diamonds are the archetypal signatures of Coulomb blockade, a well-known charging effect mainly observed in nanometer-sized "electronic islands" tunnel-coupled with charge reservoirs. Here, we identify apparent Coulomb diamond features in the scanning gate spectroscopy of a quantum point contact carved out of a semiconductor heterostructure, in the quantum Hall regime. Varying the scanning gate parameters and the magnetic field, the diamonds are found to smoothly evolve to checkerboard patterns. To explain this surprising behavior, we put forward a model which relies on the presence of a nanometer-sized Fabry-P\'erot quantum Hall interferometer at the center of the constriction with tunable tunneling paths coupling the central part of the interferometer to the quantum Hall channels running along the device edges. Both types of signatures, diamonds and checkerboards, and the observed transition, are reproduced by simply varying the interferometer size and the transmission probabilities at the tunneling paths. The new proposed interpretation of diamond phenomenology will likely lead to revisit previous data, and opens the way towards engineering more complex interferometric devices with nanoscale dimensions. Comment: 8 pages, 4 figures |
| Databáze: | OpenAIRE |
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