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Magnetic-field dependence of a Josephson traveling-wave parametric amplifier and integration into a high-field setup

Autor: Janssen, L. M., Butseraen, G., Krause, J., Coissard, A., Planat, L., Roch, N., Catelani, G., Ando, Yoichi, Dickel, C.

We investigate the effect of magnetic field on a photonic-crystal Josephson traveling-wave parametric amplifier (TWPA). We show that the observed change in photonic bandgap and plasma frequency of the TWPA can be modeled by considering the suppressio

Externí odkaz: http://arxiv.org/abs/2402.19398

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Absence of edge reconstruction for quantum Hall edge channels in graphene devices

Autor: Coissard, Alexis, Grushin, Adolfo G., Repellin, Cécile, Veyrat, Louis, Watanabe, Kenji, Taniguchi, Takashi, Gay, Frédéric, Courtois, Hervé, Sellier, Hermann, Sacépé, Benjamin

Publikováno v: Science Advances 9, eadf7220 (2023)

Electronic edge states in topological insulators have become a major paradigm in physics. The oldest and primary example is that of quantum Hall (QH) edge channels that propagate along the periphery of two-dimensional electron gases (2DEGs) under per

Externí odkaz: http://arxiv.org/abs/2210.08152

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Imaging tunable quantum Hall broken-symmetry orders in graphene

Autor: Coissard, Alexis, Wander, David, Vignaud, Hadrien, Grushin, Adolfo G., Repellin, Cécile, Watanabe, Kenji, Taniguchi, Takashi, Gay, Frédéric, Winkelmann, Clemens B., Courtois, Hervé, Sellier, Hermann, Sacépé, Benjamin

Publikováno v: Nature 605, 51-56 (2022)

When electrons populate a flat band their kinetic energy becomes negligible, forcing them to organize in exotic many-body states to minimize their Coulomb energy. The zeroth Landau level of graphene under magnetic field is a particularly interesting

Externí odkaz: http://arxiv.org/abs/2110.02811

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Review

Paul Krugman, un économiste engagé Steven Coissard

Autor: Hugon, Philippe

Publikováno v: Revue Tiers Monde, 2010 Jan 01(201), 230-230.

Externí odkaz: https://www.jstor.org/stable/23593696

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Helical quantum Hall phase in graphene on SrTiO$_3$

Autor: Veyrat, Louis, Déprez, Corentin, Coissard, Alexis, Li, Xiaoxi, Gay, Frédéric, Watanabe, Kenji, Taniguchi, Takashi, Han, Zheng Vitto, Piot, Benjamin A., Sellier, Hermann, Sacépé, Benjamin

Publikováno v: Science 367, 781 (2020)

The ground state of charge neutral graphene under perpendicular magnetic field was predicted to be a quantum Hall topological insulator with a ferromagnetic order and spin-filtered, helical edge channels. In most experiments, however, an otherwise in

Externí odkaz: http://arxiv.org/abs/1907.02299

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