TY - JOUR
T1 - Excitonic effects on high-harmonic generation in Mott insulators
AU - Udono, Mina
AU - Sugimoto, Koudai
AU - Kaneko, Tatsuya
AU - Ohta, Yukinori
N1 - Funding Information:
The authors would like to thank S. Ejima, A. Koga, Y. Murakami, and M. Sato for fruitful discussions. The iTEBD and the density-matrix renormalization-group calculations were performed using the ITensor library . This work was supported by Grants-in-Aid for Scientific Research from JSPS (Grants No. JP17K05530, No. JP18K13509, No. JP19K14644, No. JP20H01849, and No. JP21K03439). M.U. acknowledges financial support from QS-Fellowship of Chiba University.
Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/6/15
Y1 - 2022/6/15
N2 - To study excitonic effects on high-harmonic generation (HHG) in Mott insulators, we investigate pumped nonequilibrium dynamics in the one-dimensional extended Hubbard model. By employing time-dependent calculations based on the exact diagonalization and infinite time-evolving block decimation methods, we find the strong enhancement of the HHG intensity around the exciton energy. The subcycle analysis in the sub-Mott-gap regime shows that the intensity region of the time-resolved spectrum around the exciton energy splits into two levels and oscillates following the driving electric field. This excitonic dynamics is qualitatively different from the dynamics of free doublon and holon but favorably contributes to HHG in the Mott insulator.
AB - To study excitonic effects on high-harmonic generation (HHG) in Mott insulators, we investigate pumped nonequilibrium dynamics in the one-dimensional extended Hubbard model. By employing time-dependent calculations based on the exact diagonalization and infinite time-evolving block decimation methods, we find the strong enhancement of the HHG intensity around the exciton energy. The subcycle analysis in the sub-Mott-gap regime shows that the intensity region of the time-resolved spectrum around the exciton energy splits into two levels and oscillates following the driving electric field. This excitonic dynamics is qualitatively different from the dynamics of free doublon and holon but favorably contributes to HHG in the Mott insulator.
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U2 - 10.1103/PhysRevB.105.L241108
DO - 10.1103/PhysRevB.105.L241108
M3 - Article
AN - SCOPUS:85132333532
VL - 105
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 2469-9950
IS - 24
M1 - L241108
ER -