Control of magnetic and topological orders with a DC electric field

Article

关键词: LIGHT-INDUCED SUPERCONDUCTIVITY;    HEISENBERG-ANTIFERROMAGNET;    MOTT INSULATOR;    EXPERIMENTAL REALIZATION;    HALDANE-GAP;    EXCITATIONS;    TRANSITION;    DYNAMICS;    STATES;    MODEL;   

DOI  :  10.1103/PhysRevB.100.060408

来源: SCIE

【 摘 要 】

We theoretically propose a route to control magnetic and topological orders in a broad class of insulating magnets with a DC electric field. We show from the strong-coupling expansion that magnetic exchange interactions along the electric field direction are generally enhanced in Mott insulators. Employing this DC field effect, we demonstrate that several magnetic or topological ordered phases such as quantum spin liquids and Haldane-gap states can be induced if we apply a strong enough DC electric field to typical frustrated or low-dimensional magnets. Our proposal is effective especially for magnets in the vicinity of magnetic phase transition points, and would also be applicable for magnets under low-frequency AC electric fields such as terahertz laser pulses. A similar strategy of controlling exchange interactions can also be utilized in cold atomic systems.

【 授权许可】

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