Evidence of Kitaev interaction in the monolayer 1T-CrTe${}_2$

Abstract

The two-dimensional 1T-CrTe${}_2$ has been an attractive room-temperature van der Waals magnet which has a potential application in spintronic devices. Although it was recognized as a ferromagnetism in the past, the monolayer 1T-CrTe${}_2$ was recently found to exhibit zigzag antiferromagnetism with the easy axis oriented at $70^{\circ }$ to the perpendicular direction of the plane. Therefore, the origin of the intricate anisotropic magnetic behavior therein is well worthy of thorough exploration. Here, by applying density functional theory with spin spiral method, we demonstrate that the Kitaev interaction, together with the single-ion anisotropy and other off-diagonal exchanges, is amenable to explain the magnetic orientation in the metallic 1T-CrTe${}_2$. Moreover, the Ruderman-Kittle-Kasuya-Yosida interaction can also be extracted from the dispersion calculations, which explains the metallic behavior of 1T-CrTe${}_2$. Our results demonstrate that 1T-CrTe${}_2$ is potentially a rare metallic Kitaev material.

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Cited by in corpus (2)

• Chiral spin state and nematic ferromagnet in the spin-1 Kitaev-$\Gamma$ model
• Many-body electronic structure, self-doped double-exchange, and Hund metallicity in 1T-CrTe2 bulk and monolayer