Faculty Publications

Title

Raman scattering in superconducting NdO 1-x F x BiS 2 crystals

Document Type

Article

Keywords

electron-phonon coupling, Raman scattering, superconductive mechanism

Journal/Book/Conference Title

Superconductor Science and Technology

Volume

29

Issue

1

Abstract

The recently discovered layered BiS 2 -based superconductors are of great interest due to their structural similarity to cuprate and iron-pnictide superconductors. We performed Raman scattering measurements on two superconducting crystals NdO 0.5 F 0.5 BiS 2 (T c = 4.5 K) and NdO 0.7 F 0.3 BiS 2 (T c = 4.8 K). We assigned observed Raman phonon modes with the aid of first-principles calculations. The asymmetric phonon mode around 118 cm -1 reveals a small electron-phonon coupling constant λ ∼ 0.16, which is insufficient to generate superconductivity at ∼4.5 K.

Original Publication Date

1-1-2016

DOI of published version

10.1088/0953-2048/29/1/015007

Repository

UNI ScholarWorks, Rod Library, University of Northern Iowa

Language

en

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