Física de la Matèria Condensada: Enviaments recents
Ara mostrant els elements 321-340 de 1286
Depinning transition of dislocation assemblies: Pileups and low-angle grain boundaries
We investigate the depinning transition occurring in dislocation assemblies. In particular, we consider the cases of regularly spaced pileups and low-angle grain boundaries interacting with a disordered stress landscape ...
Synthesis of sodium-zinc spinel ferrites
The synthesis of spinel ferrites with composition Zn1-2xNaxFe2+xO4has been performed and the composition range in which single phase samples are obtained has been defined. The characterization of the samples has been carried ...
Force Spectroscopy with Dual-Trap Optical Tweezers: Molecular Stiffness Measurements and Coupled Fluctuations Analysis
ABSTRACT Dual-trap optical tweezers are often used in high-resolution measurements in single-molecule biophysics. Such measurements can be hindered by the presence of extraneous noise sources, the most prominent of which ...
La radiació gravitatòria
Newton va concebre la gravitació -bastant a contra- corrent de les modes intel·lectuals del seu temps- com una interacció que s'exerceix a distància entre dos cossos qualsevol. D'acord amb la visió newtoniana, la gravitació ...
First-passage times for non-Markovian processes: Shot noise
The stochastic-trajectory-analysis technique is applied to the calculation of the mean¿first-passage-time statistics for processes driven by external shot noise. Explicit analytical expressions are obtained for free and ...
Smart thermal management with near-field thermal radiation
When two objects at different temperatures are separated by a vacuum gap they can exchange heat by radiation only. At large separation distances (far-field regime), the amount of transferred heat flux is limited by ...
Synchronization, diversity, and topology of networks of integrate and fire oscillators
We study synchronization dynamics of a population of pulse-coupled oscillators. In particular, we focus our attention on the interplay between topological disorder and synchronization features of networks. First, we analyze ...
Closure of the Monte Carlo dynamical equation in the spherical Sherrington-Kirkpatrick model
We study the analytical solution of the Monte Carlo dynamics in the spherical Sherrington-Kirkpatrick model using the technique of the generating function. Explicit solutions for one-time observables (like the energy) and ...
Telegraphic processes with stochastic resettings
We investigate the effects of resetting mechanisms on random processes that follow the telegrapher's equation instead of the usual diffusion equation. We thus study the consequences of a finite speed of signal propagation, ...
Saturation of radiative heat transfer due to many-body thermalization
Radiative heat transfer between two bodies saturates at very short separation distances due to the nonlocal optical response of the materials. In this work, we show that the presence of radiative interactions with a third ...
Magnetic transition in highly frustrated SrCr8Ga4O19: The archetypal kagomé system
Both dc and ac magnetic susceptibility have been carefully measured and analyzed in order to determine the features of the low-temperature magnetic state of the highly frustrated SrCr 8 Ga 4 O 19 compound. The ...
Depth profile of uncompensated spins in an exchange bias system
We have used the unique spatial sensitivity of polarized neutron and soft x-ray beams in reflection geometry to measure the depth dependence of magnetization across the interface between a ferromagnet and an antiferromagnet. ...
Non independent continuous-time random walks
The usual development of the continuous-time random walk (CTRW) assumes that jumps and time intervals are a two-dimensional set of independent and identically distributed random variables. In this paper, we address the ...
When telegrapher's equation furnishes a better approximation to transport equation than the difussion approximation
It has been suggested that a solution to the transport equation which includes anisotropic scattering can be approximated by the solution to a telegrapher's equation [A.J. Ishimaru, Appl. Opt. 28, 2210 (1989)]. We show ...
Topology and correlations in structured scale-free networks
We study a recently introduced class of scale-free networks showing a high clustering coefficient and nontrivial connectivity correlations. We find that the connectivity probability distribution strongly depends on the ...
Static and dynamic structure of liquid metals: Role of the different parts of the interaction potential
The influence of different parts of the interaction potential on the microscopic behavior of simple liquid metals is investigated by molecular dynamics simulation. The role of the soft-core repulsive, short-range attractive, ...
Running Faster Together: Huge Speed up of Thermal Ratchets due to Hydrodynamic Coupling
We present simulations that reveal a surprisingly large effect of hydrodynamic coupling on the speed of thermal ratchet motors. The model that we use considers particles performing thermal ratchet motion in a hydrodynamic ...
Brittle to ductile transition in a fiber bundle with strong heterogeneity
We analyze the failure process of a two-component system with widely different fracture strength in the framework of a fiber bundle model with localized load sharing. A fraction 0≤α≤1 of the bundle is strong and it is ...
Cooperativity-Dependent Folding of Single-Stranded DNA
The folding of biological macromolecules is a fundamental process of which we lack a full comprehension. Mostly studied in proteins and RNA, single-stranded DNA (ssDNA) also folds, at physiological salt conditions, by ...
Temperature dependence of the magnetization processes in Co/Al oxide/Permalloy trilayers
The magnetization process of Co/Al oxide/Py trilayers and its evolution with the temperature have been analyzed. The particular behavior of the Co layers, including the shift of the hysteresis loops and a coercivity increase ...
