Potential landscape of a clean superconductor mapped by pm/s-moving vortices
نویسندگان
چکیده
We investigated vortex dynamics in a pristine sample of type II superconductor NbSe2 by scanning tunneling microscopy at 4.2 K. The decay of the magnetic field at ∼ nT/s in our superconducting magnet induced the motion of vortices at ∼ pm/s. Characteristics of the trajectories and speed variations of the moving vortices clearly revealed the potential landscape of vortices in the sample. Our vortex driving method may have wide application for the study of vortex matter on the nanometer scale by directly mapping an energy landscape.
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