Strong effects of uniaxial pressure and short-range correlations in Cr2Ge2Te6

Abstract

Cr${}_2$Ge${}_2$Te${}_6$ is a quasi-2D semiconducting van der Waals ferromagnet down to the bilayer with great potential for technological applications. Engineering the critical temperature to achieve room temperature applications is one of the critical next steps on this path. Here, we report high-resolution capacitance dilatometry studies on Cr${}_2$Ge${}_2$Te${}_6$ single crystals which directly prove significant magnetoelastic coupling and provide quantitative values of the large uniaxial pressure effects on long-range magnetic order ($\partial T_{\mathrm{C}}/\partial p_{\mathrm{c}}$ = 24.7 K/GPa and $\partial T_{\mathrm{C}}/\partial p_{\mathrm{ab}}$ = $-$15.6 K/GPa) derived from thermodynamic relations. Moderate in-plane strain is thus sufficient to strongly enhance ferromagnetism in Cr${}_2$Ge${}_2$Te${}_6$ up to room temperature. Moreover, unambiguous signs for short-range magnetic order up to 200~K are found.

arXiv commentMain text: 8 pages, 4 figures; update of numerical values

References in corpus (31)

• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Very Large Tunneling Magnetoresistance in Layered Magnetic Semiconductor CrI${}_3$
• Pressure-controlled interlayer magnetism in atomically thin CrI3
• Highly efficient spin-orbit torque and switching of layered ferromagnet Fe3GeTe2
• Magnetic Correlations in the Quasi-2D Semiconducting Ferromagnet CrSiTe${}_3$
• Strain-tunable van der Waals interactions in few-layer black phosphorus
• Bulk properties of van-der-Waals hard ferromagnet VI3
• Magnetic anisotropy of the single-crystalline ferromagnetic insulator Cr2Ge2Te6
• Synthesis, Engineering, and Theory of 2D van der Waals Magnets
• Magnetic anisotropy and spin-polarized two-dimensional electron gas in the van der Waals ferromagnet Cr${}_2$Ge${}_2$Te${}_6$
• Strain-induced phase transition in CrI${}_3$ bilayers
• Evolution of magnetic order in van-der-Waals antiferromagnet FePS${}_3$ through insulator-metal transition
• Breakdown of magnetic order in the pressurized Kitaev iridate $\beta$-Li${}_2$IrO${}_3$
• Magnetic exchange interactions in the van der Waals layered antiferromagnet MnPSe3
• Increased Curie temperature and enhanced perpendicular magneto anisotropy of Cr2Ge2Te6/NiO heterostructure
• Grüneisen parameter studies on heavy fermion quantum criticality
• Room temperature Mott metal-insulator transition in V2O3 compounds induced via strain-engineering
• Effect of hydrostatic pressure on ferromagnetism in two-dimensional CrI${}_3$
• Nearly room temperature ferromagnetism in pressure-induced correlated metallic state of van der Waals insulator CrGeTe${}_3$
• Magnetic Anisotropy and Low Field Magnetic Phase Diagram of Quasi Two-Dimensional Ferromagnet Cr${}_2$Ge${}_2$Te${}_6$
• Strongly Tunable Anisotropic Thermal Transport in MoS2 by Strain and Lithium Intercalation: First--Principles Calculations
• Effect of Coulomb interaction on the two-dimensional electronic structure of the van der Waals ferromagnet Cr${}_2$Ge${}_2$Te${}_6$
• Pressure-induced huge increase of Curie temperature of the van der Waals ferromagnet VI3
• Anisotropy governed competition of magnetic phases in the honeycomb quantum magnet Na${}_3$Ni${}_2$SbO${}_6$ studied by dilatometry and high-frequency ESR
• Pressure control of the magnetic anisotropy of the quasi-two-dimensional van der Waals ferromagnet Cr${}_2$Ge${}_2$Te${}_6$
• Uniaxial and hydrostatic pressure effects in alpha-RuCl3 single crystals via thermal-expansion measurements
• Uniaxial pressure effects in the two-dimensional van-der-Waals ferromagnet CrI${}_3$
• Emergent magnetic states due to stacking and strain in the van der Waals magnetic trilayer CrI3
• Pressure-induced melting of the orbital polaron lattice in La1-xSrxMnO3
• The magnetic field and pressure dependence of the magnetic ordering transition in NaxCoO2 (0.6<x<0.72)

Cited by in corpus (8)

• Spin Seebeck Effect: Sensitive Probe for Elementary Excitation, Spin Correlation, Transport, Magnetic Order, and Domains in Solids
• Observation of enhanced spin-spin correlations at triple point in 2D ferromagnetic Cr2X2Te6 (X=Si, Ge)
• Sizable suppression of magnon Hall effect by magnon damping in Cr${}_2$Ge${}_2$Te${}_6$
• Strong uniaxial pressure dependencies evidencing spin-lattice coupling and spin fluctuations in Cr${}_2$Ge${}_2$Te${}_6$
• Fluctuating Fractionalized Spins in Quasi Two-dimensional Magnetic V0.85PS3
• Exchange striction induced thermal Hall effect in van der Waals antiferromagnet MnPS${}_3$
• Near room-temperature ferromagnetism from double-exchange in the van der Waals material CrGeTe${}_3$: evidence from optical conductivity under pressure
• Critical behavior and evidence of dimensional crossover in quasi-two-dimensional Li${}_2$FeSiO${}_4$