Light-induced switching of magnetic order in the anisotropic triangular-lattice Hubbard model

Article

关键词: INDUCED SUPERCONDUCTIVITY;    QUANTUM;    ULTRAFAST;    ANTIFERROMAGNETISM;    EVOLUTION;   

DOI  :  10.1103/PhysRevB.103.L161106

来源: SCIE

【 摘 要 】

The time-dependent exact-diagonalization method is used to study the light-induced phase transition of magnetic orders in the anisotropic triangular-lattice Hubbard model. Calculating the spin correlation function, we confirm that the phase transition from the 120 degrees order to the Neel order can take place due to high-frequency periodic fields. We show that the effective Heisenberg-model Hamiltonian derived from the high-frequency expansion by the Floquet theory describes the present system very well and that the ratio of the exchange interactions expressed in terms of the frequency and amplitude of the external field determines the type of the magnetic orders. Our results demonstrate the controllability of the magnetic orders by tuning the external field.

【 授权许可】

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