Física de la Matèria Condensada: Recent submissions
Now showing items 141-160 of 1287
Power conversion efficiency of non-equilibrium light absorption
We deduce a novel expression for the non-equilibrium photochemical potential and the power conversion efficiency of non-equilibrium light absorption by a thermostated material. Application of our results for the case of ...
Topological magnetic irreversibility in superconducting Pb samples of various shapes
The magnetic-field dependence of the magnetization of cylinders, disks, and spheres of pure type-I superconducting lead was investigated by means of isothermal measurements of first magnetization curves and hysteresis ...
Quantum tunneling of domain walls in ferromagnets
We present a theoretical study of the quantum depinning of domain walls. Our approach extends earlier work by Stamp and confirms his suggestion that quantum tunneling of domain walls in ferromagnets may reveal itself at a ...
Active microrheology in corrugated channels: Comparison of thermal and colloidal baths
Hypothesis The dynamics of colloidal suspension confined within porous materials strongly differs from that in the bulk. In particular, within porous materials, the presence of boundaries with complex shapes entangles the ...
Magnetic ordering and spin reorientations in Nd1.8Sr0.2NiO3.72
The magnetic behavior of the reduced Nd 1.8 Sr 0.2 NiO 3.72 nickelate has been investigated by means of neutron-powder diffraction, magnetic susceptibility, and isothermal magnetization measurements. The most ...
On a class of exact solutions to the Fokker-Planck equations
In this paper we study under which circumstances there exists a general change of gross variables that transforms any FokkerPlanck equation into another of the OrnsteinUhlenbeck class that, therefore, has an exact solution. ...
Canonical formalism for path dependent Lagrangians. Coupling constant expansions
A canonical formalism obtained for path-dependent Lagrangians is applied to Fokker-type Lagrangians. The results are specialized for coupling constant expansions and later on are applied to relativistic systems of particles ...
Vortices and extreme black holes: The question of flux expulsion
It has been claimed that extreme black holes exhibit a phenomenon of flux expulsion for Abelian Higgs vortices, irrespective of the relative width of the vortex to the black hole. Recent work by two of the authors showed ...
Statistics of lowest droplets in two-dimensional Gaussian Ising spin glasses
An approach to determine the value of the zero-temperature thermal exponent u in spin glasses is presented. It consists in describing the energy level spectrum in spin glasses only in terms of the properties of the lowest ...
Unravelling the role of phoretic and hydrodynamic interactions in active colloidal suspensions
Active fluids comprise a variety of systems composed of elements immersed in a fluid environment which can convert some form of energy into directed motion; as such they are intrinsically out-of-equilibrium in the absence ...
Dislocation jamming and Andrade creep
We simulate the glide motion of an assembly of interacting dislocations under the action of an external shear stress and show that the associated plastic creep relaxation follows Andrades law. Our results indicate that ...
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 ...
Impact of community structure on information transfer
The observation that real complex networks have internal structure has important implication for dynamic processes occurring on such topologies. Here we investigate the impact of community structure on a model of information ...
A Thermokinetic approach to radiative heat transfer at the nanoscale
Radiative heat exchange at the nanoscale presents a challenge for several areas due to its scope and nature. Here, we provide a thermokinetic description of microscale radiative energy transfer including phonon-photon ...
Giant multicaloric response of bulk Fe49Rh51
We report on the multicaloric response of the Fe49Rh51 alloy under the combined application of hydrostatic pressure and magnetic field. Experimental data are complemented by a mean field model that takes into account the ...
Magnetic domains and surface effects in hollow maghemite nanoparticles
In the present work, we investigate the magnetic properties of ferrimagnetic and noninteracting maghemite gamm-Fe2O3 hollow nanoparticles obtained by the Kirkendall effect. From the experimental characterization of their ...
Hierarchical neural network with high storage capacity
A recent method used to optimize biased neural networks with low levels of activity is applied to a hierarchical model. As a consequence, the performance of the system is strongly enhanced. The steps to achieve optimization ...
How the stability of a folded protein depends on interfacial water properties and residue-residue interactions
Proteins tend to adopt a single or a reduced ensemble of configurations at natural conditions [1], but changes in temperature T and pressure P induce their unfolding. Therefore for each protein there is a stability region ...
Network Topology in Water Nanoconfined between Phospholipid Membranes
Water provides the driving force for the assembly and stability of many cellular components. Despite its impact on biological functions, a nanoscale understanding of the relationship between its structure and dynamics under ...
Entropic stochastic resonance
We present a novel scheme for the appearance of stochastic resonance when the dynamics of a Brownian particle takes place in a confined medium. The presence of uneven boundaries, giving rise to an entropic contribution to ...
