Concept

Anisotropie

Publications associées (339)

Load response due to local and global indeterminacies of FRP-deck bridges

In a cellular FRP deck-on-beam bridge, the deck's load response is influenced by the cellular frame's local indeterminacy and by the global indeterminacy due to multiple beams at each support. Thus, the stiffness distributions for both levels of indetermin ...

2012

Electro-switchable polydimethylsiloxane-based optofluidics

Andreas Vasdekis, Luciano De Sio, Marilisa Romito

We report on the fabrication and characterization of a new generation of electro-switchable optofluidic devices based on flexible substrates, combined with the extraordinary properties of reconfigurable soft-materials. A conductive polydimethylsiloxane mic ...

Royal Soc Chemistry2012

Electric field effect in graphite crystallites

Klaus Kern, Marko Burghard, Kannan Balasubramanian, Adarsh Singh Sagar

Graphite is a highly anisotropic crystal with a quasi-two-dimensional electronic structure exhibiting high intrinsic charge carrier mobility. Here, we investigate the effect of an electric field on the resistance of individual graphite crystallites with a ...

2012

In-Plane Magnetic Anisotropy of Fe Atoms on Bi2Se3(111)

Klaus Kern, Violetta Sessi

The robustness of the gapless topological surface state hosted by a 3D topological insulator against perturbations of magnetic origin has been the focus of recent investigations. We present a comprehensive study of the magnetic properties of Fe impurities ...

2012

Physics of Polariton Condensates in GaN-based Planar Microcavities

Jacques Levrat

Since its prediction in 1996 by Imamoğlu and coworkers, the use of a non-equilibrium polariton condensate to produce an intense coherent light source referred to as a polariton laser has attracted a lot of interest in the whole physics community as it ...

EPFL2012

Biaxial texture development in aluminum nitride layers during off-axis sputter deposition

Paul Muralt

Polycrystalline aluminum nitride (AlN) layers were deposited by pulsed-dc reactive magnetron sputtering from a variable deposition angle alpha = 0 degrees-84 degrees in 5 mTorr pure N-2 at room temperature. X-ray diffraction pole figure analyses show that ...

American Vacuum Society2012

Surface-Plasmon-Induced Modification on the Spontaneous Emission Spectrum via Subwavelength-Confined Anisotropic Purcell Factor

Olivier Martin, Jingwen Zhang

The mechanism of using the anisotropic Purcell factor to control the spontaneous emission linewidths in a four-level atom is theoretically demonstrated; if the polarization angle bisector of the two dipole moments lies along the axis of large/small Purcell ...

2012

Mechanism of hydrothermal growth of ferroelectric PZT nanowires

Nava Setter, Silviu Cosmin Sandu, Jin Wang, Alexandre Durussel, Mtabazi Geofrey Sahini

The formation mechanism of hydrothermally grown monocrystalline ferroelectric PZT nanowires is investigated. It is shown that the growth proceeds via a two-step process. Particles of the centrosymmetric PX-phase grow initially, having a fibrous morphology ...

2012

Numerical And Statistical Estimates Of The Representative Volume Element Of Elastoplastic Random Composites

Matteo Galli, Joël Cugnoni

In many applications elastoplastic composites are used in limited amounts, therefore it is important to have estimates of the size of their representative volume element both for modeling and experimental purposes. In this work the tensile response of part ...

Elsevier2012

Dominant phonon wavevectors of the 2D Raman mode of graphene

Nicola Marzari

We investigate the dominant phonon wavevectors q* and the associated dominant phonon-assisted electronic transitions implied by the 2D Raman mode of graphene by combining ab initio calculations with a full two-dimensional integration over the graphene Bril ...

2011

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