Wurtzite vs rock-salt MnSe epitaxy: electronic and altermagnetic properties

Abstract

Newly discovered altermagnets are magnetic materials exhibiting both compensated magnetic order, similar to antiferromagnets, and simultaneous non-relativistic spin-splitting of the bands, akin to ferromagnets. This characteristic arises from the specific symmetry operations that connect the spin sublattices. In this report, we show with ab initio calculations that the semiconductive MnSe exhibits altermagnetic spin-splitting in the wurtzite phase as well as a critical temperature well above room temperature. It is the first material from such space group identified to possess altermagnetic properties. Furthermore, we demonstrate experimentally through structural characterization techniques that it is possible to obtain thin films of both the intriguing wurtzite phase of MnSe and the more common rock-salt MnSe using molecular beam epitaxy on GaAs substrates. The choice of buffer layers plays a crucial role in determining the resulting phase and consequently extends the array of materials available for the physics of altermagnetism.

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Cited by in corpus (20)

• Altermagnetism: Exploring New Frontiers in Magnetism and Spintronics
• Mirror Chern Bands and Weyl Nodal Loops in Altermagnets
• Coexistence of Anomalous Hall Effect and Weak Net Magnetization in Collinear Antiferromagnet MnTe
• Staggered Dzyaloshinskii-Moriya inducing weak ferromagnetism in centrosymmetric altermagnets and weak ferrimagnetism in noncentrosymmetric altermagnets
• Altermagnetism from interaction-driven itinerant magnetism
• Pushing an Altermagnet to the Ultimate 2D Limit: Evidence of Symmetry Breaking in Monolayers of GdAlSi
• Hybrid d/p-wave altermagnetism in Ca${}_3$Ru${}_2$O${}_7$ and strain-controlled spin splitting
• From local spin nematicity to altermagnets: Footprints of band topology
• Evaluating SCAN and r${}^2$SCAN meta-GGA functionals for predicting transition temperatures in antiferromagnetic materials
• Conditions for orbital selective altermagnetism in Sr${}_2$RuO${}_4$: tight binding model, similarities with cuprates and implications on superconductivity
• Thermodynamic properties of a superconductor interfaced with an altermagnet
• Dimension- and Facet-Dependent Altermagnetic Biferroics and Ferromagnetic Biferroics and Triferroics in CrSb
• Design and theory of switchable linear magnetoelectricity by ferroelectricity in Type-I multiferroics
• Relativistic Spin-momentum locking in altermagnets
• Anomalous Spectroscopical Effects in an Antiferromagnetic Semiconductor
• Dirac edge states as signature of two-dimensional altermagnetic topological crystalline phase
• Coexistence of Antiferromagnetic Cubic and Ferromagnetic Tetragonal Polymorphs in Epitaxial CuMnSb
• Relativistic spin-momentum locking in ferromagnets
• Ab-initio study of the beta Fe2O3 phase
• Wurtzite MnSe as a barrier for CdSe quantum wells with built-in electric field