Raman phonons of $α$-FeTe and Fe$_{1.03}$Se$_{0.3}$Te$_{0.7}$ single crystals

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dc.creatorXia, Tian-Long
dc.creatorHou, D.
dc.creatorZhao, S. C.
dc.creatorZhang, A. M.
dc.creatorChen, G. F.
dc.creatorLuo, J. L.
dc.creatorWang, N. L.
dc.creatorWei, J. H.
dc.creatorLu, Z. -Y.
dc.creatorZhang, Q. M.
dc.date2008-11-14
dc.date2009-04-11
dc.date.accessioned2026-07-07T13:12:56Z
dc.date.available2026-07-07T13:12:56Z
dc.descriptionThe polarized Raman scattering spectra of nonsuperconducting $α$-FeTe and of the newly discovered, As-free superconductor Fe$_{1.03}$Se$_{0.3}$Te$_{0.7}$ are measured at room temperature on single crystals. The phonon modes are assigned by combining symmetry analysis with first-principles calculations. In the parent compound $α$-FeTe, the A$_{1g}$ mode of the Te atom and the B$_{1g}$ mode of the Fe atom are observed clearly, while in superconducting Fe$_{1.03}$Se$_{0.3}$Te$_{0.7}$, only a softened Fe B$_{1g}$ mode can be seen. No electron-phonon coupling feature can be distinguished in the spectra of the two samples. By contrast, the spectra of the superconducting system show a slight enhancement below 300$cm^{-1}$, which may be of electronic origin.
dc.description4 pages, 2 tables, 3 figures
dc.identifierhttps://arxiv.org/abs/0811.2350
dc.identifierhttp://arxiv.org/abs/0811.2350
dc.identifierPhys. Rev. B 79, 140510(R) (2009)
dc.identifierdoi:10.1103/PhysRevB.79.140510
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229730
dc.subjectSuperconductivity
dc.titleRaman phonons of $α$-FeTe and Fe$_{1.03}$Se$_{0.3}$Te$_{0.7}$ single crystals
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