Student Author: Joel Tenenbaum (Class of 2006)
Faculty Author: Dr. Sasha Dukan
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 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. Supported by the Research Corporation Cottrell College Science Award.
This work was selected by the Council of Undergraduate Research (CUR) for presentation at the 2005 Posters on the Hill at the National Capitol in Washington DC, as well as published in the Proceedings of the National Conference on the Undergraduate Research (NCUR) 2005.