Abstract
To clarify the dynamics of polarons in doped Mott insulators, we performed pump-probe reflectivity measurements for two barium titanates, Ba2Ti13O22 and BaxTi8O16, with a noninteger average number of d electrons per Ti. We found that the photoinduced dynamics in Ba2Ti13O22 with a three-dimensional electronic structure is characterized by a broadening of the polaron-excitation peak immediately after photoirradiation, whereas that in BaxTi8O16 with a one-dimensional electronic structure is characterized by a change in the intensities of the polaron-excitation peak and charge-gap-excitation peak with time. This indicates that a difference in dimensionality results in different photoinduced dynamics of polarons in doped Mott insulators.
| Original language | English |
|---|---|
| Article number | 045119 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 94 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2016 Jul 15 |
ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
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Yamaguchi, N., Furuhashi, A., Nishihara, H., Murata, R., Takayama, K., & Katsufuji, T. (2016). Photoinduced dynamics in doped Mott insulators with polaronic conduction: Ba2Ti13 O22 and BaxTi8 O16. Physical Review B - Condensed Matter and Materials Physics, 94(4), [045119]. https://doi.org/10.1103/PhysRevB.94.045119