Locating an individual quantum hall island inside a quantum ring

Journal Article · Wed Dec 04 00:00:00 EST 2013 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4848404· OSTI ID:22261830

Martins, F.; Hackens, B. ^[1]; Faniel, S. ^[2]; Pala, M. G. ^[3]; Sellier, H.; Huant, S. ^[4]; Desplanque, L.; Wallart, X. ^[5]; Bayot, V. ^[6]

---

1. Université catholique de Louvain, IMCN/NAPS, Louvain-la-Neuve (Belgium)
2. Université catholique de Louvain, ICTEAM/ELEN, Louvain-la-Neuve (Belgium)
3. IMEP-LAHC, Grenoble INP, Minatec, BP 257, F-38016, Grenoble (France)
4. Institut Néel, CNRS and Université Joseph Fourier, BP 166, F-38042, Grenoble (France)
5. IEMN, Cité scientifique, BP 60069, F-59652, Villeneuve d'Ascq (France)
6. Institut Néel, CNRS and Université Joseph Fourier, BP 166, F-38042, Grenoble, France and Université catholique de Louvain, IMCN/NAPS, Louvain-la-Neuve (Belgium)

Scanning gate microscopy is used to find the position of a quantum Hall island (QHI) which controls the electron transport through a mesoscopic quantum ring. Such QHIs emerging around potential inhomogeneities are tunnel-coupled with edge states. Approaching a polarized metallic tip over the QHIs gradually changes their surface and generates Coulomb blockade oscillations. This mechanism permits the identification of the center of the QHIs. Here, by sweeping the distance between the tip and the two dimensional electron gas, we clearly locate the center of an individual QHI.

• OSTI ID: 22261830
• Journal Information: AIP Conference Proceedings, Vol. 1566, Issue 1; Conference: ICPS 2012: 31. international conference on the physics of semiconductors, Zurich (Switzerland), 29 Jul - 3 Aug 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CONTROL
ELECTRON GAS
MICROSCOPY
OSCILLATIONS