Concept

Guerre électronique

Publications associées (106)

Dynamics of electronic "bubble" formation in solid hydrogen

Majed Chergui, Franco Vigliotti, Marcia Portella Oberli

Excitation of the A(3ss) Rydberg state of NO trapped in an H2 crystal leads to the electronic bubble formation around the NO impurity, resulting in an increase of 0.9 .ANG. of the ground state cage radius. Its dynamics was followed in real-time by femtosec ...

1999

Resonant inverse photoemission in 4f systems

Marco Grioni

Resonant inverse photoemission spectroscopy (RIPES) is a new spectroscopic probe of the electronic states in solids. It exploits the resonant enhancement of the inverse photoemission cross section occurring at appropriate core absorption edges, and is ther ...

Elsevier1999

Electronic states in hyperbolic-boundary crescent-shaped quantum wires

Elyahou Kapon, Marc-André Dupertuis

A fully two-dimensional study of the electronic sub-bands in crescent-shaped quantum wires is presented. The confinement energies and the wave functions are compared by means of an aspect ratio to those produced by the adiabatic approximation. Guidelines f ...

1999

Temperature dependence of electronic states in (TaSe4)(2)I - Reply

Giorgio Margaritondo, Helmuth Berger

We reject the assertion of Claessen et al., confirm the validity of our data, and discuss possible causes for the disagreement. ...

1997

Temperature and excitation intensity dependencies of the photoluminescence spectra of GaAs/(AlGa)As disordered superlattices

Denis Martin

The temperature and excitation intensity dependencies of the photoluminescence (PL) spectra of GaAs/Al0.3Ga0.7As superlattices (SL's) having randomly distributed well widths are studied. Our results indicate that the electronic properties of disordered SL' ...

1996

First-principles studies of Cu clusters

Alfredo Pasquarello, Roberto Car

Equilibrium geometries and electronic properties of neutral and anionic Cu-n (n = 2, 10) clusters are determined via first-principles calculations which treat s and d electrons on an equal footing. We find cluster shapes similar to those reported in the li ...

1996

Load sensing and related control system for the articulated transporter of JET

The paper describes the "electronic" stiffening of the actuators developed for the articulated boom of JET. Experimental trials on a two joints Boom have confirmed the improvements of speed and reliability that can be achieved. Based on these developments, ...

1995

Ab Initio Molecular Dynamics Investigation of Singlet C2H2Li2: Determination of the Ground State Structure and Observation of LiH Intermediates

The structural, electronic, and dynamic properties of the organolithium compd. C2H2Li2 were studied via ab initio mol. dynamics simulations based on the Car-Parrinello method. Dynamic simulated annealing techniques applied to search for the low-energy conf ...

1995

Temperature-Dependence of Electronic States in (Tase4)(2)I

Giorgio Margaritondo, Helmuth Berger

Angle-resolved photoemissions studies were conducted on single-crystal (TaSe4)(2)I samples above and below the charge-density-wave transition temperature (T-CDW) of 260 K. We observed a shift of the leading photoemission edge between 300 and 60 K consisten ...

1995

Structural and Electronic-Properties of Small Copper Clusters - a First Principles Study

Alfredo Pasquarello, Roberto Car

Equilibrium geometries and electronic properties of neutral Cu-n (n = 2, 3, 4, 6, 8, 10) clusters are determined via first principles calculations which treat s and d electrons on an equal footing. Overall, we find ground state and local minimum structures ...

1995

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