Publicaciones

• Article dans une revue

Evidence of an impurity band at an n-GaN/sapphire interface

C. Mavroidis, J.J. Harris, R.B. Jackman, Z. Bougrioua, I. Moerman

We report on temperature-dependent differential Hall-effect and resistivity measurements, between 10 and 300 K, on a silicon-doped GaN epitaxial layer grown by metalorganic chemical vapor deposition on a sapphire substrate. Reactive ion etching has been used to enable Hall measurements to be taken...

Diamond and Related Materials, 2003, 12 (3-7), pp.1127-1132. ⟨10.1016/S0925-9635(02)00395-3⟩. ⟨hal-02906520⟩

• Article dans une revue

Statistical Estimation of Fast Varying Channels for Cellular Mobile Telecommunications Systems

Iyad Dayoub, M. Zaizouni, Atika Rivenq, Jean-Michel Rouvaen

The time variant environment in fast channels severely impacts on the performances of classical equal-ization techniques. A method is proposed here to circumvent this problem, particularly in the severe channel with fast behaviour. To improve the Bit Error Rate (BER) at the receiver, a new approach...

Wireless Personal Communications, 2003, 24 (4), pp.527-536. ⟨10.1023/A:1023275221420⟩. ⟨hal-03508978⟩

• Article dans une revue

Adsorption behavior of conjugated {C}3-oligomers on Si(100) and HOPG surfaces

Gauthier Mahieu, B. Grandidier, Didier Stiévenard, Christophe Krzeminski, Christophe Delerue, C. Martineau, Jean Roncali

A pi-conjugated {C}3h-oligomer involving three dithienylethylene branches bridged at the meta positions of a central benzenic core has been synthesized and deposited either on the Si(100) surface or on the HOPG surface. On the silicon surface, scanning tunneling microscopy allows the observation of...

Langmuir, 2003, 19 (8), pp.3350-3356. ⟨10.1021/la026907n⟩. ⟨hal-00688536⟩

• Article dans une revue

Dimensionality-dependent self energy corrections and exchange-correlation potential in semiconductor nanostructures

Christophe Delerue, Guy Allan, Michel Lannoo

We study the quasiparticle gap in semiconductor nanostructures versus dimensionality and compare it to the value obtained in the local density approximation. We first develop general arguments based on the GW approach which we then substantiate numerically by a tight binding version of this theory...

Physical Review Letters, 2003, 90, pp.076803/1-4. ⟨10.1103/PhysRevLett.90.076803⟩. ⟨hal-00146609⟩

• Communication dans un congrès

Microelectromechanical variable-bandwidth if frequency filters with tunable electrostatical coupling spring

Dimitri Galayko, Andreas Kaiser, Lionel Buchaillot, Dominique Collard, Chantal Combi

This paper describes the theory, design and test of a novel architecture of highly-selective micromechanical filters employing electrostatically coupled resonators with floating or biased coupling electrodes. This original method avoids the use of mechanical coupling springs thus extending the...

Micro Electro Mechanical Systems, 2003. MEMS-03 Kyoto. IEEE The Sixteenth Annual International Conference on, Jan 2003, Kyoto, Japan. ⟨10.1109/MEMSYS.2003.1189709⟩. ⟨hal-01522205⟩

• Communication dans un congrès

Arabic isolated word recognition using general regression neural network

A. Amrouche, Jean-Michel Rouvaen

2003, pp.689-692. ⟨hal-00154885⟩

• Article dans une revue

Numerical homogenization techniques applied to piezoelectric composites

E. Lenglet, Anne-Christine Hladky, J.C. Debus

Journal of the Acoustical Society of America, 2003, 113, pp.826-833. ⟨hal-00144883⟩

• Article dans une revue

Formation of Pt-based silicide contacts : kinetics, stochiometry and current drive capabilities

Guilhem Larrieu, Emmanuel Dubois, X. Wallart, Xavier Baie, J. Katcki

A detailed analysis of the formation of Pt2Si and PtSi silicides is proposed, based on x-ray photoelectron spectroscopy ~XPS!, transmission electron microscopy ~TEM!, and electrical characterizations. Published kinetics of the Pt2Si and PtSi transformations under ultrahigh vacuum condition are...

Journal of Applied Physics, 2003, 94 (12), pp.7801-7810. ⟨10.1063/1.1605817⟩. ⟨hal-00146394⟩

• Communication dans un congrès

Finite volume methods for wave phase conjugation in active media

A. Merlen, P. Voinovitch, Vladimir Preobrazhensky, Philippe Pernod

6th International Conference on Mathematical and Numerical Aspects of Wave Propagation, WAVES 2003, 2003, Finland. pp.765-769. ⟨hal-00250177⟩

• Communication dans un congrès

Premiers résultats de puissance à 4 GHz obtenus sur HEMTs AlGaN/GaN en technologie planar

N. Vellas, Y. Guhel, Christophe Gaquière, B. Boudart, J.C. Pesant, Z. Bougrioua, Marie Germain, Jean-Claude de Jaeger

2003, pp.4A2-1. ⟨hal-00146692⟩