We carry out an extensive Monte Carlo study of phase transitions in 2D superconducting networks, in an applied magnetic field, for square and honeycomb geometries. We consider both systems with a dilute vortex density 1/q, and dense systems near " full frustration " with vortex density 1/2 − 1/q. The dilute case gives the continuum limit as q → ∞, and serves as a model for a uniform superconduc...

Because of a dynamical character of the s-d interaction the probability of the scattering of conduction electrons by magnetic impurities is found to involve a term proportional to 2/(E) -1, where /(E) is the fermi distribution function. Since df(c)/dc is large at the fermi surface, thermo-electric power arising from the diffusion of conduction electrons becomes very large. It is found to be ind...

The ability to dope transition metal dichalcogenides such as tungsten diselenide (WSe2) with magnetic atoms in a controlled manner has motivated intense research the aim of generating dilute semiconductors. In this work, semiconducting WSe2 monolayers, substitutionally doped vanadium atoms, are investigated using low-temperature luminescence and optoelectronic spectroscopy. V-dopants lead p-typ...

Abstract. Non-hydrogenative para-hydrogen-induced polarization (PHIP) is a fast, efficient and relatively inexpensive approach to enhance nuclear magnetic resonance (NMR) signals of small molecules in solution. The efficiency this technique depends on the interplay NMR relaxation kinetic processes, which, at high concentrations, can be characterized by selective inversion experiments. However, ...

Abstract Vapochromism, a phenomenon in which the color or luminescence of substance changes response to gaseous molecules, has potential for developing sensor materials detect harmful substances environment. In addition, vapochromism is scientifically interesting direct visualization interactions between gases and solids. The crystals metal complexes involve diverse flexible electronic interact...

Worldwide research activity at the nanoscale is triggering the appearance of new, and frequently surprising, materials properties in which the increasing importance of surface and interface effects plays a fundamental role. This opens further possibilities in the development of new multifunctional materials with tuned physical properties that do not arise together at the bulk scale. Unfortunate...

We have probed the magnetic field dependence of the electron phase coherence time tau(phi) by measuring the Aharonov-Bohm conductance oscillations of mesoscopic Cu rings. Whereas tau(phi) determined from the low-field magnetoresistance saturates below 1 K, the amplitude of Aharonov-Bohm h/e oscillations increases strongly on a magnetic field scale proportional to the temperature. This provides ...

We study the critical behavior of the diluted antiferromagnet in a field with the tethered Monte Carlo formalism. We compute the critical exponents (including the elusive hyperscaling violations exponent θ ). Our results provide a comprehensive description of the phase transition and clarify the inconsistencies between previous experimental and theoretical work. To do so, our method addresses t...

A unidirectional anisotropy appears in field cooled samples of dilute magnetic alloys at temperatures well below the cusp temperature of the zero field cooled magnetization curve. Magnetization measurements on a Cu(13.5 at% Mn) sample show that this anisotropy is essentially temperature independent and acts on a temperature dependent excess magnetization, ΔM. The anisotropy can be partially or ...