Weak localization and conductance fluctuations of a chaotic quantum dot with tunable spin-orbit coupling

In a two-dimensional quantum dot in a GaAs heterostructure, the spin-orbit scattering rate is substantially reduced below the rate in a bulk two-dimensional electron gas [B.I. Halperin et al, Phys. Rev. Lett. 86, 2106 (2001)]. Such a reduction can be undone if the spin-orbit coupling parameters acquire a spatial dependence, which can be achieved, e.g., by a metal gate covering only a part of the quantum dot. We calculate the effect of such spatially non-uniform spin-orbit scattering on the weak localization correction and the universal conductance fluctuations of a chaotic quantum dot coupled to electron reservoirs by ballistic point contacts, in the presence of a magnetic field parallel to the plane of the quantum dot.Comment: 4 pages, RevTeX; 2 figures. Substantial revision

Еколого-геохімічні дослідження ґрунтів в зоні впливу підприємств чорної металургії м. Маріуполя

Вивчено закономірності розподілу і форми знаходження важких металів у ґрунтах і компонентах оточуючого середовища поблизу комбінатів чорної металургії м. Маріуполь.Изучены закономерности распределения и формы нахождения тяжелых металлов в почвах и компонентах окружающей среды вблизи комбинатов черной металлургии г. Мариуполь.There was done investigation of distribution and deportment form of heavy metals in soils and environmental components nearby the group of ferrous metallurgy enterprises of Mariupol

Decay Rate Distributions of Disordered Slabs and Application to Random Lasers

We compute the distribution of the decay rates (also referred to as residues) of the eigenstates of a disordered slab from a numerical model. From the results of the numerical simulations, we are able to find simple analytical formulae that describe those results well. This is possible for samples both in the diffusive and in the localised regime. As example of a possible application, we investigate the lasing threshold of random lasers.Comment: 11 pages, 11 figure

Effect of the coupling to a superconductor on the level statistics of a metal grain in a magnetic field

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