Infrared nano-spectroscopy and imaging of collective superfluid excitations in conventional and high-temperature superconductors

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 sub-diffractional spatial resolution.

arXiv comment11 pages, 8 figures

References in corpus (12)

• Gate-tuning of graphene plasmons revealed by infrared nano-imaging
• Optical nano-imaging of gate-tuneable graphene plasmons
• The `Higgs' Amplitude Mode at the Two-Dimensional Superfluid-Mott Insulator Transition
• Universal scaling relation in high-temperature superconductors
• Electronic and plasmonic phenomena at graphene grain boundaries
• Visibility of the Amplitude (Higgs) Mode in Condensed Matter
• Applications of hyperbolic metamaterial substrates
• Electrodynamics of the Nodal Metal in Weakly Doped High-$T_c$ Cuprates
• Near-field spectroscopy of silicon dioxide thin films
• Local measurement of the superfluid density in the pnictide superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ across the superconducting dome
• In-plane optical conductivity of La${}_{2-x}$Sr${}_x$CuO${}_4$: Reduced superconducting condensate and residual Drude-like response
• Spatially Resolved Nonlinearity Measurements of YBa${}_2$Cu${}_3$O${}_{7-d}$ Bi-crystal Grain Boundaries

Cited by in corpus (18)

• Relative efficiency of polariton emission in two-dimensional materials
• Collective modes and terahertz near-field response of superconductors
• Topological insulators are tunable waveguides for hyperbolic polaritons
• Cavity magnon-polaritons in cuprate parent compounds
• Hamiltonian optics of hyperbolic polaritons in nanogranules
• Adiabatic amplification of plasmons and demons in 2D systems
• Theory of plasmon reflection by a 1D junction
• Harnessing Ultraconfined Graphene Plasmons to Probe the Electrodynamics of Superconductors
• Generalized plasma waves in layered superconductors
• Surface Josephson plasma waves in a high-temperature superconductor
• Coherent Emission from Surface Josephson Plasmons in Striped Cuprates
• Hydrodynamics of plastic deformations in electronic crystals
• Terahertz topological plasmon polaritons for robust temperature sensing
• Dispersion of plasmons in three-dimensional superconductors
• Optical absorption in tilted geometries as an indirect measurement of longitudinal plasma waves in layered cuprates
• Artifact Free Transient Near-Field Nanoscopy
• Intrinsic left-handed electromagnetic properties in anisotropic superconductors
• Enhanced coherent terahertz emission from critical superconducting fluctuations in YBa${}_2$Cu${}_3$O${}_{6.6}$