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  • Title: Atomic-scale spin spiral with a unique rotational sense: Mn monolayer on W(001).
    Author: Ferriani P, von Bergmann K, Vedmedenko EY, Heinze S, Bode M, Heide M, Bihlmayer G, Blügel S, Wiesendanger R.
    Journal: Phys Rev Lett; 2008 Jul 11; 101(2):027201. PubMed ID: 18764220.
    Abstract:
    Using spin-polarized scanning tunneling microscopy we show that the magnetic order of 1 monolayer Mn on W(001) is a spin spiral propagating along 110 crystallographic directions. The spiral arises on the atomic scale with a period of about 2.2 nm, equivalent to only 10 atomic rows. Ab initio calculations identify the spin spiral as a left-handed cycloid stabilized by the Dzyaloshinskii-Moriya interaction, imposed by spin-orbit coupling, in the presence of softened ferromagnetic exchange coupling. Monte Carlo simulations explain the formation of a nanoscale labyrinth pattern, originating from the coexistence of the two possible rotational domains, that is intrinsic to the system.
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