Superconductivity and phonon self-energy effects in Fe_{1+y}Te_{0.6}Se_{0.4}

Superconductivity and phonon self-energy effects in Fe_{1+y}Te_{0.6}Se_{0.4}

We study a Fe_{1+y}Te_{0.6}Se_{0.4} multiband superconductor with T_{c}=14K by polarization-resolved Raman spectroscopy. Deep in the superconducting state, we detect pair-breaking excitation at 2Δ=5.6meV in the XY(B_{2g}) scattering geometry, consistent with the fundamental gap energy Δ=3meV reveale...

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Bibliographic Details
Main Authors: S.-F. Wu, A. Almoalem, I. Feldman, A. Lee, A. Kanigel, G. Blumberg
Format: Article
Language:English
Published: American Physical Society 2020-03-01
Series:Physical Review Research
Online Access:http://doi.org/10.1103/PhysRevResearch.2.013373

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