Magnetic Triple-q State in Antiferromagnetic Monolayer Interfaced with Bismuthene

TL;DR

This study demonstrates the fabrication and characterization of a bismuthene-covered Mn monolayer on Ag(111), revealing a magnetic triple-q state with uniaxial magnetic anisotropy through combined experimental and theoretical approaches.

Contribution

It reports the first observation of a magnetic triple-q (3Q) state in a bismuthene-covered Mn monolayer, supported by SP-STM and DFT calculations, highlighting the role of bismuthene in magnetic anisotropy.

Findings

Identification of the 3Q3-like spin texture as the magnetic ground state.

Observation of uniaxial magnetic anisotropy induced by bismuthene.

Switching behavior of 3Q3 domains under external magnetic fields.

Abstract

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.