Inelastic neutron scattering measurements on VI${}_{3}$, a two-dimensional ferromagnetic Mott insulator, reveal distinct anisotropic magnetic excitations that are described by a model with large bond-dependent Kitaev interactions.

Signatures of Kitaev Interactions in the van der Waals Ferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>VI</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Signatures of Kitaev Interactions in the van der Waals Ferromagnet VI3