Bernard Plaçais

   

Directeur de Recherche à l'Institut de Physique du CNRS
Groupe de Physique Mésoscopique  du  Laboratoire Pierre Aigrain  au  Département de Physique de l'Ecole Normale Supérieure
Ancien directeur du  GDR Physique Quantique Mesoscopique (2010-17)
Partenaire du Flagship Graphène

email: send email
Address: Laboratoire Pierre Aigrain, Département de Physique de l'ENS, 24, rue Lhomond, 75005 Paris, France
Office: L294
Lab: L175
Phone: +33 1 44 32 3456
Fax: +33 1 44 32 3840

Mesoscopic capacitor  (transport, RF response, noise)

         Quantificattion of the chrage relaxation resisitance                AC current quantification                quantum noise of a single electron emitter                  admittance of a chiral inductor    
   Quantized charge relaxation resistance           AC currrent Quantization          Noise of the single electron emitter        Admittance of a quantum chiral inductor

Electron quantum optics 

   single electron source     electronic Hong Ou Mandel experiment     Pauli correlation dip    electronic Hong Ou Mandel experiment
      Single electron emitter               Hong-Ou-Mandel experiment        Fermionic Hong Ou Mandel dip           Electron fractionalization

Carbon nanotube devices

       on demand single electron injection                 on demand single electron injection             trasnconductance cnt-FET
  Shot-noise in the Kondo regime      GHz carbon nanotube transitor     Transconductance at the quantum limit                  
                    

Graphene field-effect transistors

  graphene nano-transistor     80 GHz graphene on sapphire transistor        Kgated-constact transistor         Zener-Klein G/BN FET

               Nano G-FET                          80 GHz G-FET on saphire                      Gated contact G-FET                     Zener-Klein G-FET on BN
    

Noise in graphene devices

  hot electrons in graphene   electron-phonon-impurity superccollisisons in graphene   HPP-cooling         HPP-emissivity

             AC phonon cooling                      Supercollision cooling                Hyperbolic BN phonon cooling             Hyperbolic phonon emissivity

Dirac fermion optics

            Klein tunneling transistor               Klein tunneling transistor        

       Klein tunneling reflector (principle)                 Klein tunneling reflector            

Surface states of Topological Insulators 

enrgy_electric-field phase diagram of surface states             HgTe-capacitor      Bi2Se3 compressibility   
Volkov-Pankratov-states in HgTe
           HgTe-capacitor                Compressibility Bi2Se3  

Vortices in rotating superfuid Helium 4

            superfluid vortices in a tilted box           superfluid vortices in a tilted box                       
Vortices in a tilted He-4 cavity         Aniostropy of mutal friction in He4    

Vortices in rotating superfuid Hélium 3

        NMR detection of vortex nucleation under neutron irradiation               universal  nucleation rate under neutron irradiation          milli-Kelvin rotating cryostat
 Neutron induced vortex nuclation               The Kibble-Zurek scenario           Aalto's ROTA-2 cryostat            

Vortices in superconductors (transport, AC response, noise)

            High-frequency spectrum of the efffective penetration depth in the vortex state (PbIn).  Low frequency corrsponds to the inductive response and the high-frequency tail to the viscous flux flow regime. Thee crossover is best described by the two-mode electrodynamics.       High-frequency spectrum of the efffective penetration depth in the vortex state (PbIn).  Low frequency corrsponds to the inductive response and the high-frequency tail to the viscous flux flow regime. Thee crossover is best described by the two-mode electrodynamics.            The flux-flow noise spectrum in increasing vortex velocity     The flux-flow noise spectrum in increasing vortex velocity
                      DC transport (PbIn)              Two-mode AC response (PnIn)           Voltage noise spectrum (PbIn)          Flux noise spectrum (PbIn)       

Vortices in superconductors (more)

          anisotropic flux-flow resistivity of UPt3            High-frequency spectrum of the efffective penetration depth in the vortex state og YBCO        Peak effect in the surface pinning slippage strength        Crticil currents in anisotropic NbSe2
Flux-flow resistivity of "f-wave" (UPt3)        Two-mode AC response (YBCO)   Two-mode AC response (Nb)      Crtical current in anisotropic NbSe2     

Interlude : bird watching

juvenile seagull (Le Croisic, Aug. 28, 2017)         juvenile night-heron (Brière, Aug. 24, 2017)

                Juvenile seagull                   Juvenile night-heron

Conferences and schools :

Rencontres du Vietnam 2017 :
Nanophysics, from fundamental to applications reloaded, Quy-Nhon august 2017

Rencontres du Vietnam 2013 :
Nanophysics, from fundamental to applications the return, Quy-Nhon  4-10 august 2013

Ecole de physique quantique mésoscopique 2012
Transport quantique électronique :  cohérence, interactions et symétries, Cargèse

Discussions Lavoisier 2011
Prospective workshop series on graphene physics and technology.
Orsay meeting on graphene eelctronics and spintronics.

Sessions du GDR de Physique Quantique mésoscopique  2009-2017
Mesoscopic Physcis network annual meetings in Aussois

Tremblay Summer School 2007-2010 :
"Nanoscience Ile de France" series, domaine du Tremblay

Rencontres de Moriond 2008 :
Quantum transport and Nanophysics, La Thuile 8-15 march 2008

Rencontres du Vietnam 2006 :
Nanophysics, from fundamental to applications, Hanoi  6-12 august 2006

International collaborations

GRAPHENE FLAGSHIP, WP7 : electronic devices  (2013-20)

ULTI  : Transnational Acces to Ultra Low Temperature Infrastructures, ESPOO-Finland (2000-08)       
    
CARDEQ FP6-EU-STREP  : Carbon Nanotube Devices at the Quantum Limit (2006-09)    

Lectures :

Ecole Cargèse du GDR Graphene and Co, April  2018


Graphene Study,  Flagship Residential School, Kaprun, March 2015
Noise and Ballistics in graphene (parts 1 and 2)

Aalto University, April 2014
Electron Quantum Optics with Edge States, part 1
Electron Quantum Optics with Edge States, part 2

Tremblay Summer School, June 2012
Microwave graphene electronnics

Ecole Cargèse du GDR de Physique Mésoscopique, Oct. 2008
Transport dynamique dans les conducteurs mésoscopiques : aspects expérimentaux, part 1
Transport dynamique dans les conducteurs mésoscopiques : aspects expérimentaux, part 2      

Bibliography

books

Ancrage des vortex dans les supracondcuteurs, EDP Sciences, 2000     Special Issue Hot carriers in Graphene       cack-cover