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

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 superconducto...

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Published in:arXiv.org 2014-07
Main Authors: Stinson, H T, Wu, J S, Jiang, B Y, Fei, Z, Rodin, A S, Chapler, B C, Mcleod, A S, A Castro Neto, Lee, Y S, Fogler, M M, Basov, D N
Format: Article
Language:English
Subjects:
Energy gap
Fluids
High temperature superconductors
Infrared imaging
Infrared spectroscopy
Modelling
Plasma frequencies
Polaritons
Spatial resolution
Spectrum analysis
Superconductors
Superfluidity
Unconventional superconductors
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creator Stinson, H T
Wu, J S
Jiang, B Y
Fei, Z
Rodin, A S
Chapler, B C
Mcleod, A S
A Castro Neto
Lee, Y S
Fogler, M M
Basov, D N
description 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.
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subjects Energy gap
Fluids
High temperature superconductors
Infrared imaging
Infrared spectroscopy
Modelling
Plasma frequencies
Polaritons
Spatial resolution
Spectrum analysis
Superconductors
Superfluidity
Unconventional superconductors
title Infrared nano-spectroscopy and imaging of collective superfluid excitations in conventional and high-temperature superconductors
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