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We study the effect of a spin-dependent electron temperature detected in a recent experiment on the electronic transport through a quantum dot connected to external leads. At low temperatures, the electron occupation number on the dot and the current become fully spin-polarized even in the...
In this article, the influence of the electron velocity, the hydrogenic impurity, and the temperature on the properties of bound magnetopolarons in quantum disks in a magnetic field is studied by using the Lee-Low-Pines-Takda transformation. The results of the numerical calculation indicate that...
The electronic transport properties of insulating Si:Ga films with superconducting, Ga-rich nanoprecipitates are investigated in dependence on temperature, current, and magnetic field. The large negative magnetoresistance, observed below the critical temperature can be explained by Cooper pair...
A formulation on equilibrium crystal shape determination based on the principle of virtual work is presented. The treatment is an extension of the two-dimensional study presented in Reivinen et al. (J Low Temp Phys 170:75–90, 2013) to three dimensions. A corresponding discrete solution method is...
We investigate the properties of a three-dimensional homogeneous dipolar Bose gas in a weak random potential with a Gaussian correlation function at finite temperature. Using the Bogoliubov theory (beyond the mean field), we calculate the superfluid and the condensate fractions in terms of the...
We explore the possibility that the fast and exotic negative ions in superfluid helium are electrons bound to quantized vortex structures, the simplest being a ring. In the states we consider, the electron energy is only slightly below the conduction band minimum of bulk helium. To support our...
This paper reviews the advantages of replacing the mechanical bearings of low-temperature pumps by radial high- temperature superconductor (HTS) bearings. Radial HTS bearings have the advantage of being non-abrasive, so that the working life is increased significantly. In this article, two types...
, x = 0, 0.1, 0.2 and 0.3, mol%) polycrystalline composites were prepared by a solid-state reaction method. With the increasing of Ag...
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