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 |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Photoinduced dynamics in doped Mott insulators with polaronic conduction : Ba2Ti13 O22 and BaxTi8 O16. / Yamaguchi, N.; Furuhashi, A.; Nishihara, H.; Murata, R.; Takayama, K.; Katsufuji, Takuro.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 94, No. 4, 045119, 15.07.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Photoinduced dynamics in doped Mott insulators with polaronic conduction
T2 - Ba2Ti13 O22 and BaxTi8 O16
AU - Yamaguchi, N.
AU - Furuhashi, A.
AU - Nishihara, H.
AU - Murata, R.
AU - Takayama, K.
AU - Katsufuji, Takuro
PY - 2016/7/15
Y1 - 2016/7/15
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.94.045119
DO - 10.1103/PhysRevB.94.045119
M3 - Article
VL - 94
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 4
M1 - 045119
ER -