Probing the pairing interaction and multiple Bardasis-Schrieffer modes using Raman spectroscopy

Autor:	Maiti, S., Maier, T. A., Boehm, T., Hackl, R., Hirschfeld, P. J.
Rok vydání:	2016
Předmět:	Condensed Matter - Superconductivity
Zdroj:	Phys. Rev. Lett. 117, 257001 (2016)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.117.257001
Popis:	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. Comment: 5pp+7pp, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1611.04541 Zobrazit plný text záznamu View this record from Arxiv