Department of Physics, Engineering Physics & Astronomy

Department of Physics, Engineering Physics & Astronomy
Department of Physics, Engineering Physics & Astronomy

Probing Anisotropic Superconductivity with Rotated Magnetic Fields

Ilya Vekhter
Louisiana State University

Thursday, October 18, 2012
10:30 AM @ Stirling 501

Abstract:

Novel superconductors provide a window into the physics of the emergent phenomena since in many of these materials strong electron-electron repulsion both gives rise to unconventional metallic properties and at the same time is responsible for electron pairing. Superconducting state in such systems is anisotropic, with pairing states that are strongly dependent on the direction of motion of the electrons. Determining this anisotropy is a crucial step in identifying the underlying interactions. After introducing and reviewing the subject, I will show that in anisotropic superconductors rotation of the applied magnetic field produces oscillations in the specific heat and electronic thermal conductivity which can be used to determine the shape of the order parameter. I will review our recent work investigating these oscillations in different temperature and field regimes, focusing on the comparison of our predictions with experiments. I will specifically address the measurements on heavy fermion compounds, pnictides, and organic superconductors, and review open questions.