02-10-2012
Contact : Eric Ressouche
The compound URu2Si2 is the object of intense investigations for twenty years because the nature of the phase transition observed at T0 = 17.5 K in this compound still remains a mystery despite an impressive experimental effort.
03-12-2011
Modeling strongly correlated systems is a very delicate task. For instance, the theory for the phonon spectrum of uranium has only been available since 2008.
23-09-2011
This result is on the front page of Phys. Rev Lett. 107 (13). The article by S. Raymond et al.
04-05-2011
Based on numerical simulations, we have reached a new step in our understanding of the mechanisms that drive the growth of carbon nanotubes.   One of the most commonly used methods for synthesizing carbon nanotubes is chemical vapor deposition (CVD).
05-04-2011
Contact: Xavier Jehl
We have designed and fabricated the first electron pump using silicon on insulator (SOI) in a standard microelectronics technology. These devices could be used as electrical current standards.
01-02-2011
Were you aware that atomic disorder in a metal could result in a quantum transition to an insulating state? Then, what about it when the metal is also a superconductor? Spatially resolved tunneling spectroscopy has revealed the spectral signature of this transition in this paradoxical context.
15-12-2010
We have just discovered a new spin ice, i.e., a magnetic system with a residual entropy at low temperature.   Statistical physics teaches us that a system’s entropy goes to a finite limit when the temperature approaches absolute zero.
10-09-2010
Contact : Georgios Katsaros – SPSMS
When two superconductors are connected through a tunnel junction, electron pairs -- the so-called Cooper pairs -- can flow from one to the other. This phenomenon is known as the Josephson effect.
04-05-2010
Contact: Dai Aoki
It has been known for a couple of years that superconductivity in correlated electron systems can coexist with a ferromagnetic state.
03-04-2010
In the quest for high critical temperature superconductors (HTCS), a new family of iron-based compounds was discovered in 2008, some of them containing arsenic while others, more recently found, contain selenium or tellurium.
05-02-2010
Contact: Xavier Jehl
Following the downsizing of microelectronics devices, a large variability in the characteristics of nominally identical transistors is observed.
10-11-2009
One of the main characteristics of high critical temperature superconductors is the existence of an abnormally small density of electronic states at the Fermi level, in the normal state. We have just witnessed similar behaviour in a conventional, albeit very disordered, superconductor.
10-10-2009
A neutron resonance spin echo (NRSE) option has recently been installed on the three-axis spectrometer IN22 (CRG at the ILL). This device enables a gain up to two orders of magnitude in terms of energy resolution, and permits precise measurements of dispersive excitation lifetimes.
01-06-2009
After more than 20 years of intense research, the nature of the phase which appears below 18 K in the compound URu2Si2 remains a mystery. Until now, no measurement using a microscopic probe has been able to directly link a physical parameter to this phase.
06-04-2009
Contact: Georgios Katsaros
Starting with a self-assembled SiGe island, we have fabricated a device in which we can precisely control the number of charge carriers. Thanks to the properties of the material in use, this device provides a means to manipulate the spin of the charge carriers in an unprecedented way.
03-02-2009
Contact : Massimo Mongillo
Using a single silicon nanowire, we have made the first prototype of a multipurpose device which can be used as a field effect transistor, a Schottky diode or a p-n diode.

 

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