Speaker
Wei Liu
(Johns Hopkins University)
Description
Wei Liu, Johns Hopkins University
Minsoo Kim, SUNY Buffalo,
Dr. G. Sambandamurthy, SUNY Buffalo,
Dr. N. Peter Armitage, Johns Hopkins University
We incorporated a 8 Tesla magnet into our newly developed Corbino broadband microwave spectrometer, which allows us to perform measurements over a range from 0.21 GHz to 15 GHz at temperatures down to 300 mK. We investigate the complex AC conductance of disordered InO$_x$ films as a function of magnetic field through the 2D superconductor-insulator quantum phase transition. We study the behaviors of the frequency dependent complex response function of a particular InO$_x$ sample near the critical point in the limit of $\hbar \omega < K _{B} T$ and $\hbar \omega > K _{B} T$ and compare our results to theoretical models. We carry out a fully dynamic investigation of how superconductivity is destroyed through the transition. Our data would show evidence for this particular InO$_x$ film whether Bosonic or Fermionic picture of the quantum phase transition could apply.
Primary author
Wei Liu
(Johns Hopkins University)
