We studied the dynamics of photoinduced phenomena in AV 10O 15 (A=Ba, Sr), where the ground state changes from an insulating state with V trimerization (Ba) to another insulating state with no structural anomaly (Sr). We found that the time dependence of photoinduced reflectivity change is similar up to several picoseconds, but is critically different in the range of several tens of picoseconds between the two compounds. These different behaviors can be attributed to the coupled mode of the photoexcited electronic state and the lattice distortion, which propagates in the crystal of SrV 10O 15 but is trapped in the local minimum of the free energy in BaV 10O 15.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2011 Dec 29|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics