TY - JOUR
T1 - High Harmonic Generation in a Correlated Electron System
AU - Imai, Shohei
AU - Ono, Atsushi
AU - Ishihara, Sumio
N1 - Funding Information:
The authors would like to thank Y. Masaki, S. Iwai, and M. Naka for their fruitful discussions. This work was supported by JSPS KAKENHI, Grants No. JP17H02916, No. JP18H05208, and No. JP19K23419. Some of the numerical calculations were performed using the facilities of the Supercomputer Center, the Institute for Solid State Physics, The University of Tokyo.
Funding Information:
The authors would like to thank Y. Masaki, S. Iwai, and M. Naka for their fruitful discussions. This work was supported by JSPS KAKENHI, Grants No.?JP17H02916, No.?JP18H05208, and No.?JP19K23419. Some of the numerical calculations were performed using the facilities of the Supercomputer Center, the Institute for Solid State Physics, The University of Tokyo.
Publisher Copyright:
© 2020 American Physical Society. © 2020 American Physical Society.
PY - 2020/4/17
Y1 - 2020/4/17
N2 - High harmonic generation in crystalline solids has been examined so far on the basis of one-body energy-band structures arising from electron itineracy in a periodic potential. Here, we show the emergence of high harmonic generation signals which are attributed to the dynamics of many-body states in a low-dimensional correlated electron system. An interacting fermion model and its effective pseudospin model on a one-dimensional dimer-type lattice are analyzed. Observed high harmonic generation signals in a spontaneously symmetry-broken state, where charge densities are polarized inside of dimer units, show threshold behavior with respect to light amplitude and are interpreted in terms of tunneling and recombination of kink-antikink excitations in an electric field.
AB - High harmonic generation in crystalline solids has been examined so far on the basis of one-body energy-band structures arising from electron itineracy in a periodic potential. Here, we show the emergence of high harmonic generation signals which are attributed to the dynamics of many-body states in a low-dimensional correlated electron system. An interacting fermion model and its effective pseudospin model on a one-dimensional dimer-type lattice are analyzed. Observed high harmonic generation signals in a spontaneously symmetry-broken state, where charge densities are polarized inside of dimer units, show threshold behavior with respect to light amplitude and are interpreted in terms of tunneling and recombination of kink-antikink excitations in an electric field.
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U2 - 10.1103/PhysRevLett.124.157404
DO - 10.1103/PhysRevLett.124.157404
M3 - Article
C2 - 32357061
AN - SCOPUS:85084668770
SN - 0031-9007
VL - 124
JO - Physical Review Letters
JF - Physical Review Letters
IS - 15
M1 - 157404
ER -