Spectroscopic Identification of Charge Carrying Species in BaBiO3.

This paper spectroscopically characterizes elementary electronic excitations in BaBiO3. We have utilized pump and probe spectroscopic techniques which have identified a single transient spectrum subsequent to either pulsed optical or pulsed thermal excitation. Quantitative comparison of our results with studies of electrical transport allow the assignment of the spectroscopic transient to the intrinsic charge carrying state.