"Quantum Nanoelectronics" Seminars - Nanosciences

Séminaires Nanoelectronique quantique

"Quantum Nanoelectronics" Seminars

Signatures of Majorana fermions in semiconductor nanowires coupled to superconductors

Tuesday 15 May 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Sergey FROLOV ( Delft University of Technology, The Netherlands) Majorana fermions are particles identical to their own antiparticles, first introduced by Majorana as hypothetical elementary particles. Subsequently they were predicted in topological superconductors...

Quantum entanglement of spins in diamond: generation, detection and application

Tuesday 22 May 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Ronald HANSON (Delft University of Technology, The Netherlands) Quantum entanglement- the property that particles can share a common state even when separated by a large distance- was heavily debated during most of the previous century. Entanglement is now viewed as a powerful resource that...

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Tuesday 29 May 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Nicolas ROCH (Laboratoire Pierre Aigrain, Paris)

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Tuesday 5 June 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Kirill SHTENGEL (University of California,Riverside, USA)

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Tuesday 12 June 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Kei TAKASHINA (University of Bath, UK)

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Tuesday 26 June 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Seigo TARUCHA (University of Tokyo, Japan)

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Polymer Bulk Heterojunction Solar Cells: Nanostructure and Function

Tuesday 24 April 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS [ Acces Map ] David LIDZEY (University of Sheffield, United Kingdom) Conjugated-polymers are promising materials for applications as the active light-harvesting and charge-transporting semiconductor in thin-film organic photovoltaic (OPV) devices. Here, electron-donating polymers are mixed with an electron-accepting...

Bottom-up fabrication and characterization of graphene nanoribbons

Tuesday 17 April 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Pascal RUFFIEUX (EMPA, Dübendorf, Switzerland) Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland Graphene nanoribbons (GNRs) are predicted to be semiconductors with an electronic band gap that sensitively...

Circuit optomechanics: quantum-limited electromechanical microwave amplification, cooling, and coupled resonators

Tuesday 27 March 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Mika SILLANPÄÄ (Aalto University School of Science, Finland) Micromechanical resonators affected by radiation pressure forces allow to address fundamental questions on quantum properties of mechanical objects, or, to explore quantum limits in...

Spintorque dynamics and tunnelling magneto thermo power in CoFeB/MgO/CoFeB magnetic tunnel junctions

Tuesday 20 March 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Hans Werner SCHUMACHER (Physikalisch-Technische Bundesanstalt (PTB) Braunschweig, Germany) In this talk I will present studies of spin torque dynamics and spin caloric effects in CoFeB/MgO/CoFeB magnetic tunnel junction (MTJ) nanopillars. In the first part of my talk I...

Vibrating suspended carbon nanotube Josephson junctions

Tuesday 13 March 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Han KEIJZERS (Delft University of Technology, The Netherlands) We study a Josephson junction with an embedded high-frequency and high-quality mechanical resonator, made from a suspended carbon nanotube. Good transparency of the...

Single-Cooper-pair device based on quantum phase slips in superconducting nanowire

Tuesday 6 March 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Alexander ZORIN (Physikalisch-Technische Bundesanstalt of Braunschweig, Germany) We propose and realize a transistor-like superconducting circuit including two serially connected segments of a narrow nanowire joint by a wider segment with a capacitively coupled gate in...

Detection of the high frequency current noise of a carbon nanotube quantum dot with an-on chip detector

Tuesday 28 February 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Richard DEBLOCK (Laboratoire de Physiques des Solides, Paris) Probing the fast dynamics of many-body correlated systems has been the subject of a long-standing research activity. In this regard, nanoscale devices offer unique possibilities. Due to...

Quartet correlations between Cooper pairs in a mesoscopic double Josephson junction

Tuesday 7 February 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Régis MELIN (Institut Néel) Two Josephson junctions separated by less than the superconducting coherence length involve higher order processes that can be quite sizeable for more transparent junctions. Those processes originate from crossed Andreev reflections (CAR), where...

Antiferromagnetism of spin 1 boson : experimental study with ultracold sodium atoms

Tuesday 31 January 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Fabrice GERBIER (Laboratoire Kastler Brossel, Paris) In this talk, I will present a set of experiments done at Laboratoire Kastler Brossel (ENS Paris) on the magnetic properties of ultracold bosons cooled well below the Bose-Einstein condensation temperature....

Towards hybrid electron-photon quantum circuits

Tuesday 24 January 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Takis KONTOS (Laboratoire Pierre Aigrain, Paris) An atom coupled to a harmonic oscillator is one of the most illuminating paradigms for quantum measurements and amplification. Recently, the joint development of artificial two-level systems and high finesse microwave...

Strained HgTe: a textbook 3D topological insulator probed by magnetotransport

Tuesday 17 January 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Laurent LEVY (Institut Néel) When growing HgTe on a CdTe substrate, bi-axial strain opens a gap in HgTe turning it from a semi metal into a topological insulator. We have performed low field and high field magneto-transport in this 3D topological...

Manipulation of Dirac points in two-dimensional crystals

Tuesday 10 January 2012 at 3pm Room "Rémy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Gilles MONTAMBAUX (Laboratoire de Physique des Solides,Orsay) I consider several examples of 2D crystals where the low energy properties can be described with a 2 x 2 Hamiltonian with a spectrum exhibiting several Dirac cones. These cones are ...

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