Coupling of Coexisting Noncollinear Spin States in the Fe Monolayer on Re(0001)

Spin-polarized Scanning tunneling microscopy is used to investigate the magnetic :state of the Fe monolayer on Re(0001). Two coexisting atomic-scale noticolliriear spin textures are observed with a sharp transition between them on the order of the atomic lattice spaCing. A position correlation between the two spin states is observed both in experiments and in Monte Carlo' simulations; demonstrating their coupling behavior.