Join us for a physics colloquium, entitled ‘Revealing the topological nature of transport at mesoscopic scales with quantum interferences’ with Hélène Bouchiat, Mesoscopic Physics team in Laboratoire de Physique des Solides at the Université Paris-Saclay.
Please note– The lecture will run from 16:00-17:00, followed by refreshments from 17:00-18:00 in the Level 2 Foyer of the Blackett Building.
Abstract
A mesoscopic conductor is characterized by its size smaller than the phase coherence length of electronic wave-functions (typically one micrometer at low temperature). Mesoscopic electronic transport depends strongly on the nature of interferences between these wave functions determined by the scattering disorder potential which tends to localize electronic states at low dimension. Moreover, these interferences can be modulated by a magnetic flux through the Aharonov-Bohm effect giving rise to orbital persistent currents in ring geometries.
We show that these basic fundamental properties of mesoscopic quantum interferences can be used to reveal the existence and the physical location of 1d protected states in topological insulators.
Professional biography
1977-1981 Ecole Normale Supérieure, Paris France
1977-1978 MS University Paris VI
1978-1979 DEA de Physique atomique et statistique (Paris VI)
1979-1981 Master Thesis: “Nature and properties of local order in the spin glass alloy Ag Mn”, U. Paris XI, LPS Orsay, directed by P. Monod.
1986 PhD: “Spin glass transition: critical behaviour and magnetic noise», directed by P. Monod.
1987-1988 Postoctoral stay at Bell Laboratories, Murray Hill (USA) in the group of L. Lévy.
1989 Back to France: Creation of a research groups on Mesoscopic Physics in Orsay.
1994 S. et A. Abragam award of French Academy of Sciences
1996 Research Director CNRS
Honours, Awards, Fellowships, Membership of Professional Societies
1987 Bronze medal of CNRS
1994 Anatole and Suzanne Abragam Award of the French Academy of Sciences
1998 Jaffé Award of the French Academy of Sciences
2006 Silver medal of CNRS
2010 Elected member of the French Academy of Science
2019 ERC Advanced Grant
Teaching
Several advanced Master classes on Mesoscopic Physics and Quantum transport as well as in physics summer schools.
Helene has also Directed or codirected 20 PhD theses and 10 post-doctoral researchers and has published 200 articles ~10000 citations (google scholar)