Probing the pairing interaction and multiple Bardasis-Schrieffer modes using Raman spectroscopy
Superconductivity
2017-01-04 v1
Abstract
In unconventional superconductors, understanding the form of the pairing interaction is the primary goal. In this regard, Raman spectroscopy is a very useful tool, as it identifies the ground state and also the subleading pairing channels by probing collective modes. Here we propose a general theory for multiband Raman response and identify new features in the spectrum that can provide a robust test for a pairing theory. We identify multiple Bardasis-Schrieffer type collective modes and connect the weights of these modes to the sub-leading gap structures within a microscopic pairing theory. The conclusions are completely general, and we apply our approach to interpret the B1g Raman scattering in hole-doped BaFe2As2.
Keywords
Cite
@article{arxiv.1611.04541,
title = {Probing the pairing interaction and multiple Bardasis-Schrieffer modes using Raman spectroscopy},
author = {S. Maiti and T. A. Maier and T. Boehm and R. Hackl and P. J. Hirschfeld},
journal= {arXiv preprint arXiv:1611.04541},
year = {2017}
}
Comments
5pp+7pp, 4 figures