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 |
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Article number | 094705 |
Journal | journal of the physical society of japan |
Volume | 84 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2015 Sept 15 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy(all)