Nematic response revealed by coherent phonon oscillations in BaFe${}_2$As${}_2$

Min-Cheol Lee, Inho Kwak, Yeongseon Lee +5

We investigate coherent phonon oscillations of BaFe${}_2$As${}_2$ using optical pump-probe spectroscopy. Time-resolved optical reflectivity shows periodic modulations due to $A_{1g}$ c…