Elusive Dzyaloshinskii-Moriya interaction in monolayer <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Fe</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>GeTe</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
S. Laref, Kyoung‐Whan Kim, Aurélien Manchon
Abstract
Using symmetry analysis and density functional theory calculations, we uncover the nature of the Dzyaloshinskii-Moriya interaction in monolayer ${\mathrm{Fe}}_{3}{\mathrm{GeTe}}_{2}$. We show that while such an interaction might result in small distortions of the magnetic texture in the short range, in the long range it favors in-plane N\'eel spin spirals along equivalent directions of the crystal structure. Whereas our results show that the observed N\'eel skyrmions cannot be explained by the Dzyaloshinskii-Moriya interaction at the monolayer level, they suggest that a canted magnetic texture shall arise at the boundary of ${\mathrm{Fe}}_{3}{\mathrm{GeTe}}_{2}$ nanoflakes or nanoribbons and, most interestingly, that homochiral planar magnetic textures could be stabilized.