Possible Kitaev Quantum Spin Liquid State in 2D Materials with S=3/2

Abstract

Quantum spin liquids (QSLs) form an extremely unusual magnetic state in which the spins are highly correlated and fluctuate coherently down to the lowest temperatures, but without symmetry breaking and without the formation of any static long-range-ordered magnetism. Such intriguing phenomena are not only of great fundamental relevance in themselves, but also hold the promise for quantum computing and quantum information. Among different types of QSLs, the exactly solvable Kitaev model is attracting much attention, with most proposed candidate materials, e.g., RuCl${}_3$ and Na${}_2$IrO${}_3$, having an effective $S$=1/2 spin value. Here, via extensive first-principle-based simulations, we report the investigation of the Kitaev physics and possible Kitaev QSL state in epitaxially strained Cr-based monolayers, such as CrSiTe${}_3$, that rather possess a $S$=3/2 spin value. Our study thus extends the playground of Kitaev physics and QSLs to 3$d$ transition metal compounds.

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• The interplay of Dzyaloshinskii-Moriya and Kitaev interactions for magnonic properties of Heisenberg-Kitaev honeycomb ferromagnets
• Prospecting chiral multi-site interactions in prototypical magnetic systems
• Ground-state phase diagram of spin-$S$ Kitaev-Heisenberg models
• AC susceptometry of 2D van der Waals magnets enabled by the coherent control of quantum sensors
• Short-range Crystalline Order-Tuned Conductivity in Cr${}_2$Si${}_2$Te${}_6$ van der Waals Magnetic Crystals
• MoP${}_3$SiO${}_{11}$: a $4d^3$ honeycomb antiferromagnet with disconnected octahedra
• Computational studies on magnetism and ferroelectricity
• Molecular dipoles in designer honeycomb lattices
• The ground state in a proximity to a possible Kitaev spin liquid: An undistorted honeycomb iridate NaxIrO3 (0.60 < x < 0.80)
• Magnetic anisotropy and critical behavior of the quaternary van der Waals ferromagnetic material $\mathbf{CrG}{\mathbf{e}}_{\delta }\mathbf{S}{\mathbf{i}}_{1-\delta }\mathbf{T}{\mathbf{e}}_3$
• Low-frequency and Moiré Floquet engineering: a review