Skip to main content
eScholarship
Open Access Publications from the University of California

Infrared nanospectroscopy and imaging of collective superfluid excitations in anisotropic superconductors

  • Author(s): Stinson, HT
  • Wu, JS
  • Jiang, BY
  • Fei, Z
  • Rodin, AS
  • Chapler, BC
  • McLeod, AS
  • Castro Neto, A
  • Lee, YS
  • Fogler, MM
  • Basov, DN
  • et al.
Abstract

We investigate near-field infrared spectroscopy and superfluid polariton imaging experiments on conventional and unconventional superconductors. Our modeling shows that near-field spectroscopy can measure the magnitude of the superconducting energy gap in Bardeen-Cooper-Schrieffer-like superconductors with nanoscale spatial resolution. We demonstrate how the same technique can measure the c-axis plasma frequency, and thus the c-axis superfluid density, of layered unconventional superconductors with a similar spatial resolution. Our modeling also shows that near-field techniques can image superfluid surface mode interference patterns near physical and electronic boundaries. We describe how these images can be used to extract the collective mode dispersion of anisotropic superconductors with subdiffractional spatial resolution. © 2014 American Physical Society.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View