High temperature antiferromagnetism in ultrathin SrRu2O6 nanosheets

Abstract

The quest for room-temperature nanoscale magnets remains a central challenge, driven by their promising applications in quantum technologies. Layered $4d$ and $5d$ transition metal oxides with high magnetic ordering temperatures offer significant potential in this context. We explore ultrathin \ce{SrRu2O6} nanosheets using first-principles calculations, complemented by the classical Heisenberg Monte Carlo simulations. Remarkably, these nanosheets exhibit robust antiferromagnetic ordering with Néel temperatures exceeding 430 K, despite the enhanced spin fluctuations characteristic of two-dimensional systems. Surface-termination-induced intrinsic charge doping introduces complexity to the magnetism, resulting in an insulator-to-metal transition and renormalized Néel temperatures in doped systems. A detailed microscopic analysis reveals distinct mechanisms underlying the magnetic behavior in electron- and hole-doped nanosheets. These findings provide a foundation for advancing theoretical and experimental studies in the largely unexplored realm of correlated oxides at the two-dimensional limit.

arXiv comment12 pages, 7 figures

References in corpus (39)

• Antiferromagnetic spintronics
• Gate-tunable Room-temperature Ferromagnetism in Two-dimensional Fe${}_3$GeTe${}_2$
• Antiferromagnetic spintronics
• Ising-Type Magnetic Ordering in Atomically Thin FePS3
• Atomistic spin model simulations of magnetic nanomaterials
• Magnetic order in $\alpha$-RuCl${}_3$: a honeycomb lattice quantum magnet with strong spin-orbit coupling
• Suppression of magnetic ordering in XXZ-type antiferromagnetic monolayer NiPS3
• Evidence for a single-layer van der Waals multiferroic
• Electrons and phonons in single layers of hexagonal indium chalcogenides from ab initio calculations
• Pronounced drop of ${}^{17}$O NMR Knight shift in superconducting state of Sr${}_2$RuO${}_4$
• Insights into exfoliation possibility of MAX phases to MXenes
• Metamagnetism and critical fluctuations in high quality single crystals of the bilayer ruthenate Sr3Ru2O7
• Spin-flop transition in atomically thin MnPS${}_3$ crystals
• Imaging the Néel vector switching in the monolayer antiferromagnet MnPSe${}_3$ with strain-controlled Ising order
• Observation of two types of anyons in the Kitaev honeycomb magnet
• Magnetically driven metal-insulator transition in NaOsO3
• Continuous metal-insulator transition of the antiferromagnetic perovskite NaOsO3
• Electronic Structure and Fermiology of Sr${}_3$Ru${}_2$O${}_7$
• Multistep magnetization switching in orthogonally twisted ferromagnetic monolayers
• Thermodynamic evidence of fractionalized excitations in α-RuCl3
• Ferromagnetism and conductivity in atomically thin SrRuO3
• Origin of the high Neel temperature in SrTcO3
• Antiferromagnetism at T > 500 K in the Layered Hexagonal Ruthenate SrRu2O6
• Magnetic anisotropy reversal driven by structural symmetry-breaking in monolayer α-RuCl3
• High antiferromagnetic transition temperature of a honeycomb compound SrRu${}_2$O${}_6$
• Localized itinerant electrons and unique magnetic properties of SrRu2O6
• Metamagnetic texture in a polar antiferromagnet
• Theory of the Strange Metal Sr${}_3$Ru${}_2$O${}_7$
• Evaluating the exfoliation of two-dimensional materials with a Green's function surface model
• Spin waves and spin-state transitions in a ruthenate high-temperature antiferromagnet
• Electronic structure and the origin of the high ordering temperature in SrRu2O6
• DFT+DMFT study on soft moment magnetism and covalent bonding in SrRu${}_2$O${}_6$
• Antiferromagnetism in two-dimensional materials: progress and computational challenges
• t2g-orbital model on a honeycomb lattice: application to antiferromagnet SrRu2O6
• Observation of a pressure-induced transition from interlayer ferromagnetism to intralayer antiferromagnetism in Sr4Ru3O10
• Long-range anisotropic Heisenberg ferromagnets and electrically tunable ordering
• Electrically tunable room-temperature ferromagnetism in CrBr${}_3$
• Hidden covalent insulator and spin excitations in SrRu${}_2$O${}_6$
• Enhanced Magnetism and Phase Transitions in Ultrathin Quantum Spin Liquid Na2IrO3 Flakes