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Publications associées (151)

Early hydration of cementitious systems

Underground job sites such as tunnels and mines rely on the quality of recently sprayed concrete to secure freshly excavated zones. Rapid setting and early high strength development are required for safety as well as for the rapid progression of the constr ...

EPFL2009

Stability of helium bubbles in alpha-iron: A molecular dynamics study

Robin Schäublin, Guillaume Lucas

Molecular dynamics simulations were performed to estimate the dissociation energies of helium interstitials, vacancies and self-interstitial atoms from small helium-vacancy clusters. Several sets of empirical potentials have been tested and compared with a ...

Elsevier2009

Optimization of nanoelectronic systems' reliability under massive defect density using Cascaded R-fold modular redundancy

Alexandre Schmid, Yusuf Leblebici, Milos Stanisavljevic

The theoretical analysis of R-fold modular redundancy, cascaded R-fold modular redundancy and NAND multiplexing is presented and these fault-tolerant techniques are compared in terms of resistance to massive levels of defect density. Optimal cluster size a ...

2008

Defect energy levels in density functional calculations: Alignment and band gap problem

Alfredo Pasquarello, Peter Broqvist, Audrius Alkauskas

For materials of varying band gap, we compare energy levels of atomically localized defects calculated within a semilocal and a hybrid density-functional scheme. Since the latter scheme partially relieves the band gap problem, our study describes how calcu ...

2008

Electron spin resonance in alkali doped SWCNTs

László Forró, Bálint Náfrádi

Electron spin resonance (ESR) measurements on SWCNTs doped with alkali atoms (potassium) using a solid state reaction is reported. We find the emergence of the ESR signal of itinerant electrons upon doping with a signal intensity that is comparable to that ...

2008

A Study of the Effects of Gamma Radiation on CMOS Single=Photon Avalanche Diodes

Edoardo Charbon, Herbert Shea, Lucio Carrara, Cristiano Niclass, Marek Gersbach, Noémy Scheidegger

The paper reports on the effects of Gamma radiation to single-photon avalanche diodes (SPADs). To the best of our knowledge, this is the first study ever conducted on SPADs fabricated in CMOS technology. A typical CMOS SPAD consists of a pn junction revers ...

2008

First-principles study of Fe and FeAl defects in SiGe alloys

Alexandra Sarabando de Carvalho

First-principles, spin-polarized local-density-functional calculations are used to model interstitial iron (Fei) and its complexes with substitutional aluminum in dilute SixGe1−x alloys (x

2008

Multiscale modeling of crowdion and vacancy defects in body-centered-cubic transition metals

We investigate the structure and mobility of single self-interstitial atom and vacancy defects in body-centered-cubic transition metals forming groups 5B (vanadium, niobium, and tantalum) and 6B (chromium, molybdenum, and tungsten) of the Periodic Table. D ...

2007

Alignment of hydrogen-related defect levels at the Si-SiO2 interface

Alfredo Pasquarello, Audrius Alkauskas

We propose a method within density functional theory for aligning defect energy levels at interfaces without relying on experimental data. We apply our scheme to the alignment of charge transition levels of the interstitial hydrogen and the hydrogen bridge ...

2007

Study of cascades damage in Ni by MD with different interatomic potentials

Zhongwen Yao

Molecular dynamics (MD) simulations, performed with embedded atom potentials, are used to understand the formation of defects following displacement cascades in Ni. Different empirical potentials, presenting large differences in stacking fault energy (SFE) ...

2007

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