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arxiv: 2507.12946 · v2 · pith:OQ4YCRQZ · submitted 2025-07-17 · cond-mat.mtrl-sci · cond-mat.mes-hall

Magnetic Triple-q State in Antiferromagnetic Monolayer Interfaced with Bismuthene

Chia-Ju Chen , Yu-Tung Lin , Chieh-Lin Lee , Nitin Kumar , Hung-Chin Lee , Yen-Hui Lin , Bo-Yao Wang , Stefan Bluegel
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Gustav Bihlmayer Pin-Jui Hsu
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classification cond-mat.mtrl-sci cond-mat.mes-hall
keywords magneticbismuthenemonolayerstatecoveredsp-stmtriple-qanisotropy
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We have successfully fabricated the bismuthene covered Mn monolayer on Ag(111) by evaporating Mn atoms onto (p x root3)-Bi/Ag(111) at room temperature. By using spin-polarized scanning tunneling microscopy (SP-STM), we have resolved the magnetic triple-q (3Q) state. In combination with density-functional theory (DFT) calculations, the 3Q3-like spin texture is the magnetic ground state for the bismuthene covered Mn monolayer/Ag(111). Interestingly, the uniaxial magnetic anisotropy of 3Q3 state triggered by the bismuthene on top of Mn monolayer/Ag(111) has been revealed, which is consistent with the switching of 3Q3up and 3Q3down domains observed by SP-STM measurements with external magnetic fields.

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