"K. G. Nakamura,J. Hu,K. Norimatsu,A. Goto,K. Igarashi,T. Sasagawa","Observation of Coherent Higher Frequency A1g Phonons in Bi2Se3 using Femtosecond Time-resolved Reflection Measurement",,"Solid State Commun.",,"  152",,"  902",2012,Feb.