%0 Journal Article
%T Frustrated spin order and stripe fluctuations in FeSe
%J -
%D 2019
%R https://doi.org/10.1038/s42005-019-0107-y
%X The charge and spin dynamics of the structurally simplest iron-based superconductor, FeSe, may hold the key to understanding the physics of high temperature superconductors in general. Unlike the iron pnictides, FeSe lacks long range magnetic order in spite of a similar structural transition around 90£¿K. Here, we report results of Raman scattering experiments as a function of temperature and polarization and simulations based on exact diagonalization of a frustrated spin model. Both experiment and theory find a persistent low energy peak close to 500£¿cm£¿1 in B1g symmetry, which softens slightly around 100£¿K, that we assign to spin excitations. By comparing with results from neutron scattering, this study provides evidence for nearly frustrated stripe order in FeSe
%U https://www.nature.com/articles/s42005-019-0107-y