Superconductivity and phonon self-energy effects in Fe1+yTe0.6Se0.4

S. F. Wu; A. Almoalem; I. Feldman; A. Lee; A. Kanigel; G. Blumberg

doi:10.1103/PhysRevResearch.2.013373

Superconductivity and phonon self-energy effects in Fe1+yTe0.6Se0.4

S. F. Wu, A. Almoalem, I. Feldman, A. Lee, A. Kanigel, G. Blumberg

Technion - Israel Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Article number	013373
Journal	PHYSICAL REVIEW RESEARCH
Volume	2
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevResearch.2.013373
State	Published - Mar 2020

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevResearch.2.013373

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title = "Superconductivity and phonon self-energy effects in Fe1+yTe0.6Se0.4",

abstract = "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.",

author = "Wu, \{S. F.\} and A. Almoalem and I. Feldman and A. Lee and A. Kanigel and G. Blumberg",

note = "Publisher Copyright: {\textcopyright} 2020 authors. Published by the American Physical Society.",

year = "2020",

month = mar,

doi = "10.1103/PhysRevResearch.2.013373",

language = "الإنجليزيّة",

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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.

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.

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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 -

Superconductivity and phonon self-energy effects in Fe1+yTe0.6Se0.4

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