Abstract
Many-electron dynamics induced by a symmetric monocycle electric-field pulse of large amplitude is theoretically investigated in one-and two-dimensional half-filled extended Hubbard models on regular lattices (i.e., without dimerization) using the exact diagonalization method for small systems and the Hartree-Fock approximation for large systems. The formation of a negative-Temperature state and the change from repulsive interactions to effective attractive interactions are shown to be realized for a wide region of the field amplitude and the excitation energy. For a nonnegligible intersite repulsive interaction, the numerical results are consistent with the fact that the phase separation between charge-rich and charge-poor regions is caused by the corresponding effective attraction.
| Original language | English |
|---|---|
| Article number | 094705 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 84 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2015 Sep 15 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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Phase separation induced by symmetric monocycle optical pulse in extended hubbard models. / Yanagiya, Hiroki; Tanaka, Yasuhiro; Yonemitsu, Kenji.
In: Journal of the Physical Society of Japan, Vol. 84, No. 9, 094705, 15.09.2015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Phase separation induced by symmetric monocycle optical pulse in extended hubbard models
AU - Yanagiya, Hiroki
AU - Tanaka, Yasuhiro
AU - Yonemitsu, Kenji
PY - 2015/9/15
Y1 - 2015/9/15
N2 - Many-electron dynamics induced by a symmetric monocycle electric-field pulse of large amplitude is theoretically investigated in one-and two-dimensional half-filled extended Hubbard models on regular lattices (i.e., without dimerization) using the exact diagonalization method for small systems and the Hartree-Fock approximation for large systems. The formation of a negative-Temperature state and the change from repulsive interactions to effective attractive interactions are shown to be realized for a wide region of the field amplitude and the excitation energy. For a nonnegligible intersite repulsive interaction, the numerical results are consistent with the fact that the phase separation between charge-rich and charge-poor regions is caused by the corresponding effective attraction.
AB - Many-electron dynamics induced by a symmetric monocycle electric-field pulse of large amplitude is theoretically investigated in one-and two-dimensional half-filled extended Hubbard models on regular lattices (i.e., without dimerization) using the exact diagonalization method for small systems and the Hartree-Fock approximation for large systems. The formation of a negative-Temperature state and the change from repulsive interactions to effective attractive interactions are shown to be realized for a wide region of the field amplitude and the excitation energy. For a nonnegligible intersite repulsive interaction, the numerical results are consistent with the fact that the phase separation between charge-rich and charge-poor regions is caused by the corresponding effective attraction.
UR - http://www.scopus.com/inward/record.url?scp=84942061892&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84942061892&partnerID=8YFLogxK
U2 - 10.7566/JPSJ.84.094705
DO - 10.7566/JPSJ.84.094705
M3 - Article
VL - 84
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 9
M1 - 094705
ER -