Interplay between lattice and spin states degree of freedom in the FeSe superconductor: Dynamic spin state instabilities

V Gnezdilov, YG Pashkevich, P Lemmens… - Physical Review B …, 2013 - APS
Polarized Raman-scattering spectra of superconducting, single-crystalline FeSe evidence
pronounced phonon anomalies with temperature reduction. A large (∼ 6.5%) hardening of …