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Condensed Matter > Superconductivity

arXiv:1407.6774 (cond-mat)
[Submitted on 25 Jul 2014]

Title:Raman scattering investigation of the electron-phonon coupling in superconducting Nd(O,F)BiS$_2$

Authors:S. F. Wu, P. Richard, X. B. Wang, C. S. Lian, S. M. Nie, J. T. Wang, N. L. Wang, H. Ding
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Abstract:We have performed polarized Raman scattering measurements on the newly discovered superconductor Nd(O,F)BiS$_2$ ($T_c = 4$ K). We observe 2 Raman active modes, with frequencies in accordance with first-principles calculations. One A$_{1g}$ phonon mode at 112.4 cm$^{-1}$ exhibits a Fano line shape due to electron-phonon coupling. We find a resonance for this mode at 2.45 eV excitation energy. We estimate a 0.68 contribution of this mode to the electron-phonon coupling constant $\lambda$. Our Raman results suggest that the BiS$_2$-based superconductors are possibly phonon-mediated BCS superconductors.
Comments: 5 pages, 3 figures, 1 table
Subjects: Superconductivity (cond-mat.supr-con); Strongly Correlated Electrons (cond-mat.str-el)
Cite as: arXiv:1407.6774 [cond-mat.supr-con]
  (or arXiv:1407.6774v1 [cond-mat.supr-con] for this version)
  https://doi.org/10.48550/arXiv.1407.6774
Journal reference: Phys. Rev. B 90, 054519 (2014)
Related DOI: https://doi.org/10.1103/PhysRevB.90.054519

Submission history

From: Pierre Richard [view email]
[v1] Fri, 25 Jul 2014 01:59:43 UTC (550 KB)
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