Progress in manufacturing technology has allowed us to probe the behavior of devices on a smaller and faster scale than ever before. With increasing miniaturization, quantum effects come to dominate the transport properties of these devices, between collisions, carriers undergo ballistic motion under the influence of local electric and magnetic fields. The often surprising properties of quantum...

We consider the dispersion properties of tracer particles moving in nonequilibrium heterogeneous periodic media. The tracer motion is described by a Fokker-Planck equation with arbitrary spatially periodic (but constant in time) local diffusion tensors and drifts, eventually with the presence of obstacles. We derive a Kubo-like formula for the time-dependent effective diffusion tensor valid in ...

We describe an approach allowing high-resolution transmission electron microscopy (HRTEM) on specimens like graphene and the investigation on their electronic transport properties at the same time. The experimental set-up presented here is based on the modification of a commercial TEM specimen holder and on a specially designed sample carrier. A customized Hall sensor confirms that the local ma...

We investigate the behavior of the shear viscosity eta(p) and the mass-dependent diffusion coefficient D(m,p) in the context of a simple model that, as the cross link density p is increased, undergoes a continuous transition from a fluid to a gel. The shear viscosity diverges at the gel point according to eta(p) approximately (p(c)-p)(-s) with s approximately 0.65. The diffusion constant shows ...

1. Introduction The discovery of the superconductivity in MgB 2 [1] at a temperature as high as 39 K has stimulated a enormous interest about the comprehension of its mechanism [2][3]. The study of the electron transport properties may give an insight into the normal state conduction process and into the electronic structure of MgB 2. From this point of view the results are contradictory. In fa...

Jolanta Stankiewicz,1,* Javier Sesé,2 Geetha Balakrishnan,3 and Zachary Fisk4 1Instituto de Ciencia de Materiales de Aragón and Departamento de Fı́sica de la Materia Condensada, CSIC–Universidad de Zaragoza, 50009-Zaragoza, Spain 2Instituto de Nanociencia de Aragón and Departamento de Fı́sica de la Materia Condensada, Universidad de Zaragoza, 50018-Zaragoza, Spain 3Department of Physics, Universi...

Novel organic materials such as organic small molecules or multilayer graphene offer wealth of fascinating new properties – two of which I will highlight in this talk: 1.) Charge transport in organic semiconductors is in part governed by their environment. To access their intrinsic properties, it is imperative to isolate them from their environment. To this end we have firstly realized two-mole...

We report on low-temperature (4–320 K) transport properties of TaxN thin films deposited on an amorphous SiO2 substrate. In this work, TaxN thin films were restricted to a narrow range of x: 0.72 x 0.83 yet show considerable and nonmonotonic variation of their transport properties with Ta concentration. This behaviour is consistent with a local minimum in the density of electronic states at the...

a nonstandard finite difference (nsfd) scheme has been constructed and analyzed for a mathematical model that describes lotka–volterra food web model. this new discrete system has the same stability properties as the continuous model and,on the whole, it preservesthe same local asymptotic stability properties. linearized stability theory and schur–cohn criteria are used for local asymptoticstab...