TY - JOUR
T1 - Superconductivity and phonon self-energy effects in Fe1+yTe0.6Se0.4
AU - Wu, S. F.
AU - Almoalem, A.
AU - Feldman, I.
AU - Lee, A.
AU - Kanigel, A.
AU - Blumberg, G.
N1 - Publisher Copyright: © 2020 authors. Published by the American Physical Society.
PY - 2020/3
Y1 - 2020/3
N2 - We study a Fe1+yTe0.6Se0.4 multiband superconductor with Tc=14K by polarization-resolved Raman spectroscopy. Deep in the superconducting state, we detect pair-breaking excitation at 2Δ=5.6meV in the XY(B2g) scattering geometry, consistent with the fundamental gap energy Δ=3meV revealed by ARPES on the holelike Fermi pocket with dxz/dyz character. We analyze the superconductivity-induced phonon self-energy effects for the B1g(Fe) phonon mode and derive the electron-phonon coupling constant λΓ≈0.026, which is insufficient to explain superconductivity with Tc=14K.
AB - We study a Fe1+yTe0.6Se0.4 multiband superconductor with Tc=14K by polarization-resolved Raman spectroscopy. Deep in the superconducting state, we detect pair-breaking excitation at 2Δ=5.6meV in the XY(B2g) scattering geometry, consistent with the fundamental gap energy Δ=3meV revealed by ARPES on the holelike Fermi pocket with dxz/dyz character. We analyze the superconductivity-induced phonon self-energy effects for the B1g(Fe) phonon mode and derive the electron-phonon coupling constant λΓ≈0.026, which is insufficient to explain superconductivity with Tc=14K.
UR - http://www.scopus.com/inward/record.url?scp=85088633824&partnerID=8YFLogxK
U2 - 10.1103/PhysRevResearch.2.013373
DO - 10.1103/PhysRevResearch.2.013373
M3 - مقالة
SN - 2643-1564
VL - 2
JO - PHYSICAL REVIEW RESEARCH
JF - PHYSICAL REVIEW RESEARCH
IS - 1
M1 - 013373
ER -