Giant spin Hall Effect in two-dimensional monochalcogenides

Abstract

One of the most exciting properties of two dimensional materials is their sensitivity to external tuning of the electronic properties, for example via electric field or strain. Recently discovered analogues of phosphorene, group-IV monochalcogenides (MX with M = Ge, Sn and X = S, Se, Te), display several interesting phenomena intimately related to the in-plane strain, such as giant piezoelectricity and multiferroicity, which combine ferroelastic and ferroelectric properties. Here, using calculations from first principles, we reveal for the first time giant intrinsic spin Hall conductivities (SHC) in these materials. In particular, we show that the SHC resonances can be easily tuned by combination of strain and doping and, in some cases, strain can be used to induce semiconductor to metal transitions that make a giant spin Hall effect possible even in absence of doping. Our results indicate a new route for the design of highly tunable spintronics devices based on two-dimensional materials.

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Cited by in corpus (18)

• Microscopic manipulation of ferroelectric domains in SnSe monolayers at room temperature
• Colloquium: Physical properties of group-IV monochalcogenide monolayers
• Room-temperature ferroelectric switching of spin-to-charge conversion in GeTe
• Unconventional spin Hall effects in nonmagnetic solids
• Experimental formation of monolayer group-IV monochalcogenides
• Ultrathin SnTe films as a route towards all-in-one spintronics devices
• Quantization of spin Hall conductivity in two-dimensional topological insulators versus symmetry and spin-orbit interaction
• From atomic layer to the bulk: low-temperature atomistic structure, ferroelectric and electronic properties of SnTe films
• Unveiling the mechanism of bulk spin-orbit torques within chemically disordered Fe${}_x$Pt${}_{1-x}$ single layers
• Discovery of Higher-Order Topological Insulators using the Spin Hall Conductivity as a Topology Signature
• Unveiling the polarity of the spin-to-charge current conversion in $B{i}_{2}S{e}_3$
• Group-IV monochalcogenide monolayers: two-dimensional ferroelectrics with weak intra-layer bonds and a phosphorene-like monolayer dissociation energy
• Promoting $p$-based Hall effects by $p$-$d$-$f$ hybridization in Gd-based dichalcogenides
• Optical induced Spin Current in Monolayer NbSe${}_2$
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• Topological transition in Pb1-xSnxSe using Meta-GGA
• Spin-Hall conductivity and optical characteristics of noncentrosymmetric quantum spin Hall insulators: the case of PbBiI
• Investigating Quantum Spin-Textures Using Universal MJ Hamiltonians