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Headlines 2009

December 2009

F .Onufrieva and P. Pfeuty, Laboratoire Léon Brillouin
Superconducting pairing and electronic anomalies induced by the spin collective mode in high Tc cuprate superconductors Discovered in 1986, superconductivity at high critical temperature remains today one of the great questions in solid state physics and material studies. Several theoretical ... More »
Scientists at the "Laboratoire de chimie et biologie des métaux" (CEA-CNRS-Université J. Fourier, CEA-Grenoble), "Laboratoire de chimie des surfaces et interfaces" (CEA-Saclay) and a team at the Laboratoire d'innovation pour les technologies des énergies nouvelles et les ... More »

November 2009

Making still smaller and less power consuming digital memories for mobile electronics? Scientists from CNRS and University Paris Sud XI (Laboratory of Solid State Physics, CNRS / Univ. Paris-Sud 11 and Institut Néel) and CEA-IRAMIS come to demonstrate the feasibility, thanks to ... More »
O.Bezencenet, A.Barbier, D.Bonamy, R.Belkhou (SOLEIL), P.Ohresser (SOLEIL)
With the advent of spin electronics (spintronics), it became particularly important to visualize and understand how magnetic domains form in magnetic structures. This is particularly tricky for antiferromagnetic layers, which show no macroscopic magnetization and therefore interact weakly with ... More »
- J. Kermorvant, Laboratoire des Solides Irradiés & Unité Mixte CNRS-Thalès (Palaiseau)- C.J. van der Beek, Laboratoire des Solides Irradiés, Ecole Polytechnique- Collaboration J. Briatico, B. Marcilhac, J.C Mage, Unité Mixte CNRS-Thalès (Palaiseau), ... More »
Emmanuel Betranhandy, Nathalie Vast and Jelena Sjakste
The mechanical properties of boron carbide at high pressure, explained from first principles. By theoretical methods based on the density functional theory (DFT and DFPT) [1] [2], the physical properties of boron carbide have been studied for different carbon concentrations and versus temperature ... More »

September 2009

F. Mallet, F. Ong, A. Palacios, F. Nguyen, P. Bertet, Denis Vion and D. Esteve
After the realization in 2002 of one of the first solid state quantum bits (qubits), scientists from the Quantronique IRAMIS-SPEC research group have performed a further step towards the realization of  an elementary quantum processor: the accurate and non destructive readout of such a ... More »
A. Cassimi, D. Hennecart, J. Rangama, T. Been,  D. Lelièvre, J.-M. Ramillon,  -  CIMAP, CEA-CNRS, Caen,T. Muranaka CEA-IRFU SaclayA. Leredde, X. Fléchard, LPCH. Shiromaru, J. Matsumoto,  K.-I. Hayakawa Tokyo Metropolitan University By exploring matter with ... More »
D. Kopetzki, Y. Michina, T. Gustavsson, D. Carrière
Amphiphilic molecules have a hydrophilic head and a hydrophobic chain. Under certain conditions, they can self-organize into hollow spherical hollow vesicles with a surfactant bilayer enclosing an aqueous core, the overall diameter ranging from a few tens of nanometers to several microns. By ... More »
D. Dulić, P. Lavie, S. Campidelli, A. Filoramo, collaboration : F. Pump et G. Cuniberti (Université de Dresde)
    Scientists at the Laboratory of Molecular Electronics (IRAMIS / SPEC) recently published a paper entitled  "Controlled Stability of Molecular Junctions" in the prestigious international journal Angewandte Chemie. The work done in collaboration with the group of Prof. ... More »

July 2009

Contact CEA : Hamed Merdji
In photography, the scattered light from an illuminated object is recorded with a detector and one get an image of it. If the image is formed with an objective, the optics imposes many limitations (resolution, aberrations ...). To achieve the ultimate resolution, spatially (function of the ... More »

June 2009

( Version française) We thought we knew transistor physics fairly well and in particular the millions of MOSFETs (Metal Oxyde Semi-conducteur Field Effect Transistor) which can be found at the core of our computers. However, as early as 1994, a new generation of very high mobility ... More »

April 2009

Elmar C. Fuchs1, Brigitte Bitschnau2, Jakob Woisetschläger3, Eugen Maier4, Brigitte Beuneu5 and José Teixeira5 1Wetsus, Center of Excellence for Sustainable Water Technology, Agora 1, 8900 CC Leeuwarden, The Netherlands2Institute of Physical and Theoretical Chemistry, Graz University ... More »

March 2009

H. Desvaux, D. J.Y. Marion, G. Huber, P. Berthault
In nuclear magnetic resonance (NMR) whose medical application is known as MRI, it is the voltage at the extremities of a coil that is usually monitored, since it reflects the variation of the induction created by the precession of the nuclear magnetization after a radiofrequency (RF) ... More »

January 2009

P. Camy, A. Benayad, J.L. Doualan, V. Ménard, R. Moncorgé (IRAMIS-CIMAP/MIL)
A major development to improve high power laser chains,  is to achieve both higher yields and better tunability. For future high power lasers that operates by diode-pumping at high rate, several materials likely to meet this double requirement (single crystals, glass and ceramics doped) are ... More »
J.-P Dognon, C Clavaguéra, and P. Pyykko
J.-P Dognon  : CEA Saclay - IRAMIS/SCM (France) C Clavaguéra : Laboratoire des Mécanismes Reactionnels, Ecole Polytechnique, CNRS, 91128 Palaiseau (France) P. Pyykko : Department of Chemistry, University of Helsinki, Finland  


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