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000056495 0247_ $$2DOI$$a10.1038/nature05802
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000056495 084__ $$2WoS$$aMultidisciplinary Sciences
000056495 1001_ $$0P:(DE-HGF)0$$aBode, M.$$b0
000056495 245__ $$aChiral magnetic order at surfaces driven by inversion asymmetry
000056495 260__ $$aLondon [u.a.]$$bNature Publising Group$$c2007
000056495 300__ $$a190 - 193
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000056495 520__ $$aChirality is a fascinating phenomenon that can manifest itself in subtle ways, for example in biochemistry (in the observed single-handedness of biomolecules) and in particle physics (in the charge-parity violation of electroweak interactions). In condensed matter, magnetic materials can also display single-handed, or homochiral, spin structures. This may be caused by the Dzyaloshinskii-Moriya interaction, which arises from spin-orbit scattering of electrons in an inversion-asymmetric crystal field. This effect is typically irrelevant in bulk metals as their crystals are inversion symmetric. However, low-dimensional systems lack structural inversion symmetry, so that homochiral spin structures may occur. Here we report the observation of magnetic order of a specific chirality in a single atomic layer of manganese on a tungsten (110) substrate. Spin-polarized scanning tunnelling microscopy reveals that adjacent spins are not perfectly antiferromagnetic but slightly canted, resulting in a spin spiral structure with a period of about 12 nm. We show by quantitative theory that this chiral order is caused by the Dzyaloshinskii-Moriya interaction and leads to a left-rotating spin cycloid. Our findings confirm the significance of this interaction for magnets in reduced dimensions. Chirality in nanoscale magnets may play a crucial role in spintronic devices, where the spin rather than the charge of an electron is used for data transmission and manipulation. For instance, a spin-polarized current flowing through chiral magnetic structures will exert a spin-torque on the magnetic structure, causing a variety of excitations or manipulations of the magnetization and giving rise to microwave emission, magnetization switching, or magnetic motors.
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000056495 7001_ $$0P:(DE-Juel1)VDB3766$$aHeide, M.$$b1$$uFZJ
000056495 7001_ $$0P:(DE-HGF)0$$avon Bergmann, K.$$b2
000056495 7001_ $$0P:(DE-HGF)0$$aFerriani, P.$$b3
000056495 7001_ $$0P:(DE-HGF)0$$aHeinze, S.$$b4
000056495 7001_ $$0P:(DE-Juel1)130545$$aBihlmayer, G.$$b5$$uFZJ
000056495 7001_ $$0P:(DE-HGF)0$$aKubetzka, A.$$b6
000056495 7001_ $$0P:(DE-HGF)0$$aPietzsch, O.$$b7
000056495 7001_ $$0P:(DE-Juel1)130548$$aBlügel, S.$$b8$$uFZJ
000056495 7001_ $$0P:(DE-HGF)0$$aWiesendanger, R.$$b9
000056495 773__ $$0PERI:(DE-600)1413423-8$$a10.1038/nature05802$$gVol. 447, p. 190 - 193$$p190 - 193$$q447<190 - 193$$tNature <London>$$v447$$x0028-0836$$y2007
000056495 8567_ $$uhttp://dx.doi.org/10.1038/nature05802
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000056495 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed
000056495 9201_ $$0I:(DE-Juel1)VDB781$$d31.12.2010$$gIFF$$kIFF-1$$lQuanten-Theorie der Materialien$$x0
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