Photoinduced spin-order destructions in one-dimensional extended Hubbard model

24th IUPAP Conference on Computational Physics

物理学;计算机科学

Lu, Hantao^1 ; Sota, Shigetoshi^2 ; Matsueda, Hiroaki^3 ; Bona, Janez^4,5 ; Tohyama, Takami^1

Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, 606-8502, Japan^1

Computational Materials Science Research Team, RIKEN AICS, Hyogo 650-0047, Kobe, Japan^2

Sendai National College of Technology, 989-3128, Sendai, Japan^3

Faculty of Mathematics and Physics, University of Ljubljana, SI-1000 Ljubljana, Slovenia^4

J Stefan Institute, SI-1000 Ljubljana, Slovenia^5

关键词: Antiferromagnetic spins;    Extended Hubbard model;    Lanczos methods;    Laser frequency;    Non-equilibrium process;    Photoinduced charge carriers;    Photoinduced spin;    Time dependent;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/454/1/012079/pdf
DOI  :  10.1088/1742-6596/454/1/012079

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

By employing the time-dependent Lanczos method, the nonequilibrium process of the half-filled one-dimensional extended Hubbard model under the irradiation of a transient laser pulse is investigated. We show that in the spin-density-wave (SDW) phase, the antiferromagnetic spin correlations are impaired by the photoinduced charge carriers. Near the phase boundary between the SDW and charge-density-wave (CDW) phases, a local enhancement of charge (spin) order that is absent in the original SDW (CDW) phase can be realized with proper laser frequency and strength. The possibility of restoration of spin orders from the CDW phase by optical means is discussed.