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29,351 records were found.

Ab initio Study of Graphene on SiC

Comment: 4 pages, 3 figures, 1 table; Submitted to Physical Review Letters on 01/08/07

Potfit: effective potentials from ab-initio data

Comment: 11 pages

Comparison of exact-exchange calculations for solids in current-spin-density- and spin-density-functional theory

Comment: 4 pages, 1 fig, 2 tables

Synergistic Effects of MoDTC and ZDTP on Frictional Behaviour of Tribofilms at the Nanometer Scale

The layered structure and the rheological properties of anti-wear films, generated in a rolling/sliding contact from lubricants containing zinc dialkyldithiophosphate (ZDTP) and/or molybdenum dialkyldithiocarbamate (MoDTC) additives, have been studied by dynamic nanoindentation experiments coupled with a simple modelling of the stiffness measurements. Local nano-friction experiments were conducted with the same device in order to determine the evolution of the friction coefficient as a function of the applied pressure for the different lubricant formulations. For the MoDTC film, the applied pressure in the friction test remains low (<0.5 GPa) and the apparent friction coefficient is high ($\mu$ > 0.4). For the tribofilms containing MoDTC together with ZDTP, which permits the applied pressure to increase up to a few GPa through some a...

Shaped angular dependence of the spin transfer torque and microwave generation without magnetic field

The generation of oscillations in the microwave frequency range is one of the most important applications expected from spintronics devices exploiting the spin transfer phenomenon. We report transport and microwave power measurements on specially designed nanopillars for which a non-standard angular dependence of the spin transfer torque (wavy variation) is predicted by theoretical models. We observe a new kind of current-induced dynamics that is characterized by large angle precessions in the absence of any applied field, as this is also predicted by simulation with such a wavy angular dependence of the torque. This type of non-standard nanopillars can represent an interesting way for the implementation of spin transfer oscillators since they are able to generate microwave oscillations without applied magnetic field. We also emphasi...

A thermodynamic model for the melting of supported metal nanoparticles

Comment: 7 pages, 2 figures

Effect of transition-metal elements on the electronic properties of quasicrystals and complex aluminides

In this paper, we briefly present our work on the role of transition-metal element in electronic structure and transport properties of quasicrystals and related complex phases. Several Parts of these works have been done or initiated in collaboration with Prof. T. Fujiwara.

Temporal Evolution of Step-Edge Fluctuations Under Electromigration Conditions

Comment: 7 pages, 5 figures

Phonon instability and structural phase transition in Vanadium under high pressure

Comment: 16 pages, 4 figures

Viscoplastic Properties and Tribological Behavior of Diamond-Like Carbon Films Using Nanoindentation and Nanoscratch Tests

Comment: Conference was held in Kobe, JAPAN 29th of May to 2nd of June 2005