Differential Conductance of Extreme Type-II Superconductors in High Magnetic Fields
Published: Thursday, April 21, 2005
Journal: Proceedings of the National Conference of Undergraduate Research (NCUR), Pages 1
Authors (1 total): J. Tenenbaum
Abstract: The tunneling conductance between the surface of an extreme type-II superconductor and the tip of a Scanning Tunneling Microscope (STM) in high magnetic field with temperature approaching zero is calculated. It is found that when the STM tip is placed at the position of a vortex, the differential conductance σ(V,B) has an algebraic dependence on a bias voltage reflecting the presence of the gapless points in the quasiparticle excitation spectrum of a superconductor in high magnetic fields. The differential conductance as a function of a position of the STM tip and for a fixed value of a bias voltage has a six-fold symmetry of a triangular vortex lattice with the maxima located at the position of the vortices.