Cavity-altered superconductivity

Is it feasible to alter the ground-state properties of a material by engineering its electromagnetic environment? Inspired by theoretical predictions1–12, experimental realizations of such cavity-controlled properties without optical excitation are beginning to emerge13–19. Here we devised and implemented a new platform to realize cavity-altered materials. Single crystals of hyperbolic van der Waals (vdW) compounds provide a resonant electromagnetic environment with enhanced density of photonic states and prominent mode confinement20–24. We interfaced hexagonal boron nitride (hBN) with the molecular superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br (κ-ET). The frequencies of infrared hyperbolic modes (HMs) of hBN…

• NS
  National Science Foundation

  Awards: DMR-2011738, 2011738
• UD
  U.S. Department of Energy

  Award: DE-SC0018426
• GA
  Gordon and Betty Moore Foundation

  Awards: GBMF9455, EPIQS GBMF9455
• CF
  Council for Higher Education
• DO
  Division of Materials Research

  Awards: 2011738, DMR-2011738