Welcome to the personal webpage of Erwann Bocquillon. I currently am Researcher (Chargé de recherche) at CNRS, working in Laboratoire de Physique de l’ENS.

 

Contact
LPENS
Laboratoire de physique
de l’Ecole normale supérieure
24 rue Lhomond 75005 PARIS

Publications

Last 5 publications :
  • M.C. Dartiailh, S. Hartinger, A. Gourmelon, K. Bendias, H. Bartolomei,H. Kamata, J.-M. Berroir, G. Feve, B. Plaçais, L. Lunczer, R. Schlereth,H. Buhmann, L.W. Molenkamp, and E. Bocquillon. Dynamical Separation of Bulk and Edge Transport in HgTe-Based 2D Topological InsulatorsPhysical Review Letters 124, 076802 (2020)
  • Q. Wilmart, M. Boukhicha, H. Graef, D. Mele, J. Palomo, M. Rosticher,T. Taniguchi, K. Watanabe, V. Bouchiat, E. Baudin, J.-M. Berroir, E. Bocquillon,G. Fève, E. Pallecchi, and B. Plaçais. High-Frequency Limits of Graphene Field-Effect Transistors with Velocity Saturation. Appl. Sci. 10, 446 (2020)
  • R. Bisognin, A. Marguerite, B. Roussel, M. Kumar, C. Cabart, C. Chapdelaine,A. Mohammad-Djafari, J.-M. Berroir, E. Bocquillon, B. Plaçais,A. Cavanna, U. Gennser, Y. Jin, P. Degiovanni, and G. Fève. Quantum tomography of electrical currents. Nature Communications 10, 3379 (2019)
  • H. Graef, Q. Wilmart, M. Rosticher, D. Mele, L. Banszerus, C. Stampfer,T. Taniguchi, K. Watanabe, J.-M. Berroir, E. Bocquillon, G. Fève, E. H. T.Teo, and B. Plaçais. A corner reflector of graphene Dirac fermions as a phonon-scattering sensor. Nature Communications 10, 2428 (2019)
  • E. Bocquillon. A Majorana mass production line. Nature Nanotechnology, 2019

Complete list of publications (on arXiv)

Curriculum Vitae

Current situation

CNRS Researcher (“Chargé de Recherche”), LPENS UMR 8023 / École Normale Supérieure / France (since Oct. 2016)
Secondary appointment with teaching (“Maitre de Conférences Attaché PSL-CNRS”) / École Normale Supérieure / France (since Sept. 2020)

 
Studies
  • 2009 – 2012    PhD thesis under the direction of Bernard Plaçais and Gwendal Fève
    Laboratoire Pierre Aigrain / École Normale Supérieure / Université Pierre et Marie Curie / France
    Title: Electron quantum optics in quantum Hall edge channels
  • 2008 – 2009    Master ICFP “Quantum Physics”
    École Normale Supérieure / Université Pierre et Marie Curie / France
  • 2007 – 2008    Agrégation de Physique
    Highest qualification exam for becoming high school teacher
    Rang : 2e
  • 2007  Internship M1 (6 mois), under the direction of Gregor Weihs
    Title: A heralded single photon source on a breadboard
    Institute for Quantum Computing / Canada
  • 2005 – 2009    Elève à l’École Normale Supérieure
    admis sur concours MP (22e)
Positions
  • Sep. 2020       Secondary appointment with teaching (“Maitre de Conférences Attaché PSL-CNRS”) / École Normale Supérieure / France
  • Oct. 2016        CNRS Researcher (“Chargé de Recherche”), LPENS UMR 8023 / École Normale Supérieure / France
  • 2013 – 2016    Post-doctoral researcher, Chair of Laurens W. Molenkamp / University of Würzburg / Germany
  • 2009 – 2013   “Agrégé-préparateur”, École Normale Supérieure / France
     

 

Research Interests

My scientific activities have several components:

1. Charge and spin dynamics in 2D and 3D topological insulators

2. Electron quantum optics in the quantum Hall effect regime

3. Dynamics and relaxation of Dirac fermions in graphene

I develop them within the mesoscopic physics team, in collaboration with my colleagues, Jean-Marc Berroir (Prof. ENS), Gwendal Fève (Prof. SU) in charge of the electron quantum optics project, and Bernard Plaçais (DR-CNRS), in charge of the graphene activities.

Group Photo

A part of the Meso group, gathered for the farewell party of Hiroshi Kamata, at the center of the photo.

Cryogenic microwave probe station

Zoom on the cryogenic probe station which enables to measure up to 67 GHz and temperatures below <10 K.

Helical resonators

Microwave helical resonators, fabricated from topological insulators, and ready to be measured.

Charge and spin dynamics in 2D and 3D topological insulators

Our team is studying the electron dynamics of a new class of materials called topological insulators. These materials have the particularity of being insulating in their volume, but have so-called “topological” states at the interfaces, perfectly conductive and spin-polarized. Using microwave techniques, we study the dynamic properties of these materials (electron velocity, diffusivity, interactions), and develop innovative nano-electronic devices such as frequency-tunable spin sources based on these materials.

 

 

Electron quantum optics in quantum Hall edge channels

Our team studies two-dimensional layers of high mobility electrons (AsAlGa/AsGa). On the one hand, the dynamics of coherent conductors: how are Kirchhoff’s quantum high-frequency laws modified? What is the relaxation time of the quantum coherent RC circuit? What is the elementary quantum inductance associated with a quantum mode? On the other hand, single electron manipulation: in analogy with quantum optics, can we realize a coherent single electron source, realize the entanglement of two electrons and exploit it in the form of flying qubits?

Dynamical transport in graphene

This theme, directed by B. Plaçais, straddles fundamental physics and applications. A first line of research aims to understand the dynamic properties of Dirac fermions and to characterize the ultimate limits of fast electronics based on graphene. The frontier between electronic transport and plasmonic modes, particularly relevant in two dimensions, is an important aspect of the work of H. Graef, who recently defended his thesis. A second axis aims at understanding the relaxation of hot carriers in different systems. For example, we have elucidated the intrinsic mechanisms of the disappearance of the whole quantum Hall effect regime in a high mobility graphene sample.

Teaching

  • “At doctoral level :

  • Invited lecture (1h),  ‘Mauterndorf Winter School 2020’, Mauterndorf / Austria (2020)
  • Invited lecture (2h), ‘Elitenetzwerk Bayern Winter School 2019’, Bressanone / Italy (2019)
  • Invited lecture (2h), ‘SFB1277 Summer Academy 2018’ , Bamberg / Germany (2018)
  • Invited lecture (3h), ‘Topological Matter Summer School 2018’, Donostia-San Sebastiàn / Spain (2018)
  • Invited lecture (3h), ‘Topological Matter Summer School 2017’, Donostia-San Sebastiàn / Spain (2017)
  •  Organisation et encadrement d’un cours “Electronique pour physiciens” de 3 jours (Cours+TP) pour étudiants de Master et doctorants, en collaboration avec R.S. Schouten (Delft University of Technology), Université de Würzburg / Allemagne 
  • At BSc and MSc level

  • 2016 – 2020    Lecture of wave optics (36h then 24h)
    Paris Sciences et Lettres Research University / France
  • 2013 – 2016    Bibliographic projects
    Université de Würzburg / Allemagne
  • 2009 – 2013    “Agrégé-préparateur ENS” (full teaching duty 192h/yr)
    École Normale Supérieure / France

BSc of Physics at l’ENS (2010-2013)
Tutorials for  “Introduction to Quantum Physics”
Tutorials for  “Introduction to Condensed Matter Physics”
Labs

Préparation à l’agrégation de l’ENS (Montrouge, 2009-2010)
Labs for “Agrégation de Chimie”
Labs for “Agrégation de Physique”
Preparation sessions to the oral exam of “Labs”

  • 2009 – 2011    Colles de physique, MPSI
    Lycée St Louis, Paris / France