Graphene on transition-metal dichalcogenides: A platform for proximity spin-orbit physics and optospintronics

By M. Gmitra, Jaroslav Fabian. 2015

276 citations recorded by the source corpus.

Hybrids of graphene and two-dimensional transition-metal dichalcogenides (TMDCs) have the potential to bring graphene spintronics to the next level. As we show here by performing first-principles calculations of graphene on monolayer ${\mathrm{MoS}}_{2}$, there are several advantages of such hybrids over pristine graphene. First, Dirac electrons in graphene exhibit a giant global proximity spin-orbit coupling, without compromising the semimetallic character of the whole system at zero field. Remarkably, these spin-orbit effects can be very accurately described by a simple effective Hamiltonian. Second, the Fermi level can be tuned by a transverse electric field to cross the ${\mathrm{MoS}}_{2}$ conduction band, creating a system of coupled massive and massless electron gases. Both charge and spin transport in such systems should be unique. Finally, we propose to use graphene/TMDC structures as a platform for optospintronics, in particular, for optical spin injection into graphene and for studying spin transfer between TMDCs and graphene.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/ce85c9de587096ec0df7be6daabd92d8fc99aaeb

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In Atomic and Molecular Physics, and Optics

In Materials Chemistry

Citations in the corpus

Theory of zero-field superconducting diode effect in twisted trilayer graphene (2021, unknown): “So we can focus on the leading, momentum-independent, terms in h SOC which can be written as [30]: where ( P 1 ) l , l ′ = δ l , l ′ δ l , 1 projects onto the first graphene layer.”
Origin and magnitude of 'designer' spin-orbit interaction in graphene on semiconducting transition metal dichalcogenides (2016, background): “appears to be a promising route [11] because semiconducting TMDs exhibit an extremely strong SOI [12–15] and because they are known to preserve the high electronic”
Colloquium : Spintronics in graphene and other two-dimensional materials (2019, background): “In this regard, Gmitra and Fabian (2015) proposed the use of proximityinduced SOC as way to enable direct optical spin injection.”
Very large Dzyaloshinskii-Moriya interaction in two-dimensional Janus manganese dichalcogenides and its application to realize skyrmion states (2019, background): “s can be integrated with the MnXY monolayers realized as van der Waals heterostructures [19, 52] for the electrical manipulation of skyrmions. Actually, from theoretical calculations by Gmitra et al. [53], the proximity of graphene with TMDs can induce a large spin splitting of the Dirac cone of gra”