2015/07/17 by Hiroki Yanagiya, Yasuhiro Tanaka, Kenji Yonemitsu · 1 citation
Physics and Astronomy · #Advanced Chemical Physics Studies #Amplitude #Attraction #Charge (physics) #Condensed matter physics #Electric field #Electron #Excitation #Field (mathematics) #Hubbard model #Laser-Matter Interactions and Applications #Mean field theory #Phase (matter) #Physics #Pulse (music) #Quantum electrodynamics #Quantum mechanics #Spectroscopy and Quantum Chemical Studies #Voltage #cond-mat.str-el
paper · pdf · doi:10.7566/jpsj.84.094705
published as J. Phys. Soc. Jpn. 84, 094705 (2015) · 20 pages, 10 figures, accepted for publication in J. Phys. Soc. Jpn
arxiv created 2015/07/17 · openalex publication_date 2015/08/10 · arxiv updated 2015/09/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.