Universal property of single topological singularity dynamics
نویسنده
چکیده
Using the random matrix theory we demonstrate explicitly the insensitivity of the transverse force on a moving vortex to non-intrinsic and non-magnetic impurities in a superconductor. The Berry phase acquired by a moving vortex suggests that the total transverse force on a moving vortex is proportional to the superfluid density at zero temperature, irrespective whether or not impurities are presented [1,2]. This prediction has been confirmed by a direct measurement of the transverse force in dirty superconductors [3]. Though the relaxation time approximation which accounts for impurity effects in vortex dynamics has been showed to inapplicable [4], the drastic reduction the total transverse force by impurities were believed right [5].
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