QUEST SIGNED
QUantum Hall Edge State Tunnelling spectroscopy
Total Cost €
0EC-Contrib. €
0Partnership
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0QUEST project word cloud
Explore the words cloud of the QUEST project. It provides you a very rough idea of what is the project "QUEST" about.
Project "QUEST" data sheet
The following table provides information about the project.
| Coordinator |
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
Organization address contact info |
| Coordinator Country | France [FR] |
| Project website | http://sacepe-quest.neel.cnrs.fr/ |
| Total cost | 1˙761˙411 € |
| EC max contribution | 1˙761˙411 € (100%) |
| Programme |
1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC)) |
| Code Call | ERC-2014-STG |
| Funding Scheme | ERC-STG |
| Starting year | 2015 |
| Duration (year-month-day) | from 2015-10-01 to 2020-09-30 |
Partnership
Take a look of project's partnership.
| # | ||||
|---|---|---|---|---|
| 1 | CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS | FR (PARIS) | coordinator | 1˙761˙411.00 |
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Project objective
The quantum nature of an electronic fluid is ubiquitous in many solid-state systems subjected to correlations or confinement. This is particularly true for two-dimensional electron gases (2DEGs) in which fascinating quantum states of matter, such as the integer and fractional quantum Hall (QH) states, arise under strong magnetic fields. The understanding of QH systems relies on the existence of one-dimensional (1D) conducting channels that propagate unidirectionally along the edges of the system, following the confining potential. Due to the buried nature of 2DEG commonly built in semiconducting heterostructures, the considerable real space structure of this 1D electronic fluid and its energy spectrum remain largely unexplored. This project consists in exploring at the local scale the intimate link between the spatial structure of QH edge states, coherent transport and the coupling with superconductivity at interfaces. We will use graphene as a surface-accessible 2DEG to perform a pioneering local investigation of normal and superconducting transport through QH edge states. A new and unique hybrid Atomic Force Microscope and Scanning Tunneling Microscope (STM) operating in the extreme conditions required for this physics, i.e. below 0.1 kelvin and up to 14 teslas, will be developed and will allow unprecedented access to the edge of a graphene flake where QH edge states propagate. Overall, the original combination of magnetotransport measurements with scanning tunnelling spectroscopy will solve fundamental questions on the considerable real-space structure of integer and fractional QH edge states impinged by either normal or superconducting electrodes. Our world-unique approach, which will provide the first STM imaging and spectroscopy of QH edge channels, promises to open a new field of investigation of the local scale physics of the QH effect.
Publications
| year | authors and title | journal | last update |
|---|---|---|---|
| 2019 |
I. Tamir, A. Benyamini, E. J. Telford, F. Gorniaczyk, A. Doron, T. Levinson, D. Wang, F. Gay, B. Sacépé, J. Hone, K. Watanabe, T. Taniguchi, C. R. Dean, A. N. Pasupathy, D. Shahar Sensitivity of the superconducting state in thin films published pages: eaau3826, ISSN: 2375-2548, DOI: 10.1126/sciadv.aau3826 |
Science Advances 5/3 | 2020-04-04 |
| 2019 |
Kévin Le Calvez, Louis Veyrat, Frédéric Gay, Philippe Plaindoux, Clemens B. Winkelmann, Hervé Courtois, Benjamin Sacépé Joule overheating poisons the fractional ac Josephson effect in topological Josephson junctions published pages: , ISSN: 2399-3650, DOI: 10.1038/s42005-018-0100-x |
Communications Physics 2/1 | 2019-08-05 |
| 2019 |
Thomas Dubouchet, Benjamin Sacépé, Johanna Seidemann, Dan Shahar, Marc Sanquer, Claude Chapelier Collective energy gap of preformed Cooper pairs in disordered superconductors published pages: 233-236, ISSN: 1745-2473, DOI: 10.1038/s41567-018-0365-8 |
Nature Physics 15/3 | 2019-08-05 |
| 2019 |
Louis Veyrat, Anna Jordan, Katrin Zimmermann, Frédéric Gay, Kenji Watanabe, Takashi Taniguchi, Hermann Sellier, Benjamin Sacépé Low-Magnetic-Field Regime of a Gate-Defined Constriction in High-Mobility Graphene published pages: 635-642, ISSN: 1530-6984, DOI: 10.1021/acs.nanolett.8b02584 |
Nano Letters 19/2 | 2019-08-05 |
| 2019 |
Benjamin Sacépé, Johanna Seidemann, Frédéric Gay, Kevin Davenport, Andrey Rogachev, Maoz Ovadia, Karen Michaeli, Mikhail V. Feigel’man Low-temperature anomaly in disordered superconductors near Bc2 as a vortex-glass property published pages: 48-53, ISSN: 1745-2473, DOI: 10.1038/s41567-018-0294-6 |
Nature Physics 15/1 | 2019-08-05 |
| 2018 |
Hyunjeong Kim, Frédéric Gay, Adrian Del Maestro, Benjamin Sacépé, Andrey Rogachev Pair-breaking quantum phase transition in superconducting nanowires published pages: , ISSN: 1745-2473, DOI: 10.1038/s41567-018-0179-8 |
Nature Physics | 2019-05-29 |
| 2017 |
Katrin Zimmermann, Anna Jordan, Frédéric Gay, Kenji Watanabe, Takashi Taniguchi, Zheng Han, Vincent Bouchiat, Hermann Sellier, Benjamin Sacépé Tunable transmission of quantum Hall edge channels with full degeneracy lifting in split-gated graphene devices published pages: 14983, ISSN: 2041-1723, DOI: 10.1038/ncomms14983 |
Nature Communications 8 | 2019-05-29 |
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