The femtosecond time-resolved optical spectroscopy ... The vibronic interaction in (NbSe4)3I mixes the B2u and A2g states by a B1u-symmetry phonon. ...
... distorted structures with different nodal properties at the top of valence band [1] ... JT distortion selects the nodal properties at the top of valence band ...
... Nb: narrow band semiconductor ... pseudo Jahn-Teller effect in narrow band semiconductors. increase of LT gap ... (NbSe4)3I is not so narrow band semiconductor ...