BEGIN:VCALENDAR VERSION:2.0 PRODID:-//linuxsoftware.nz//NONSGML Joyous v1.4//EN BEGIN:VEVENT SUMMARY:Spin-orbit entanglement in two-dimensional layered materials DTSTART:20230614T160000Z DTEND:20230614T170000Z DTSTAMP:20260626T114415Z UID:a09b82ad-8e21-497a-b69a-89b303a8b199 SEQUENCE:5 CREATED:20221223T121508Z DESCRIPTION:Abstract: Spin-orbit coupling (SOC)—a relativistic interacti on which entangles a particle’s motion with its quantum mechanical spin —is fundamental to a wide range of physical phenomena\, spanning from th e formation of topological insulators to the spin Hall effect of light. Re cent years have seen remarkable progress in the probing\, enhancing and ta iloring of SOC in artificial materials\, specifically heterostructures\, m ade of two or more individual flakes of graphene-like crystals arranged in a stack. From the electrical control of spin-valley coupling in bilayer g raphene [1]\, to the reversible spin-charge conversion in graphene with pr oximity-induced SOC courtesy of atomically-thin semiconductors [2]\, these discoveries challenge our previous notions on the possible behaviour of s pin-orbit coupled electrons at hetero-interfaces.In this talk\, I will sho w that the rich array of spin-dependent phenomena facilitated by proximity -induced SOC in graphene can be understood from the perspective of quantum information theory\, i.e.\, as arising from quantum-mechanical entangleme nt between real spin and lattice-pseudospin degrees of freedom [3]. The pr oximity-induced SOCand ensuing spin-spin entanglement are sensitive to the atomic registry between graphene and its high-SOC partner material\, whic h opens up interesting possibilities for spin-charge interconversion\, inc luding a current-induced spin polarization tuneable by means of a simple i nterlayer rotation angle [4].References:[1] “Anisotropic spin currents i n graphene”\, https://physics.aps.org/articles/v11/s108[2] “Proposal f or unambiguous electrical detection of spin-charge conversion in lateral s pin valves”\, S. Cavill\, C. Huang\, M. Offidani\, Y.-H. Lin\, M. Cazali lla and A. Ferreira\, Phys. Rev. Lett. 124 (2020).[3] “Theory of spin-ch arge-coupled transport in proximitized graphene: an SO(5) algebraic approa ch”\, A. Ferreira\, J. Phys. Mater. 4\, 045006 (2021).[4] “Twist angle controlled collinear Edelstein effect in van der Waals heterostructures ”\, A. Veneri\, D. Perkins\, C. Péterfalvi and A. Ferreira\, Phys. Rev. B 106\, L081405 (2022). LAST-MODIFIED:20230503T151307Z LOCATION:PA1\, Mathematics URL:http://df.vps.tecnico.ulisboa.pt/pt/eventos/spin-orbit-entanglement-in -two-dimensional-layered-materials/ X-ALT-DESC;FMTTYPE=text/html:

Abstract: Sp in-orbit coupling (SOC)—a relativistic interaction which entangles a par ticle’s motion with its quantum mechanical spin—is fundamental to a wi de range of physical phenomena\, spanning from the formation of topologica l insulators to the spin Hall effect of light. Recent years have seen rema rkable progress in the probing\, enhancing and tailoring of SOC in artific ial materials\, specifically heterostructures\, made of two or more indivi dual flakes of graphene-like crystals arranged in a stack. From the electr ical control of spin-valley coupling in bilayer graphene [1]\, to the reve rsible spin-charge conversion in graphene with proximity-induced SOC court esy of atomically-thin semiconductors [2]\, these discoveries challenge ou r previous notions on the possible behaviour of spin-orbit coupled electro ns at hetero-interfaces.

In this talk\, I will show that the rich array of spin-dependent phenomena facilitated by proximity-induced SOC in graphene can be underst ood from the perspective of quantum information theory\, i.e.\, as arising from quantum-mechanical entanglement between real spin and lattice-pseudo spin degrees of freedom [3]. The proximity-induced SOC

and ensuing spin-spin entanglement are sensitive to the atomic r egistry between graphene and its high-SOC partner material\, which opens u p interesting possibilities for spin-charge interconversion\, including a current-induced spin polarization tuneable by means of a simple interlayer rotation angle [4].

References:

[1] “Anisotropic spi n currents in graphene”\, https://physics.aps.org/articles/v11/s108

< p data-block-key="60g2n">[2] “Proposal for unambiguous electrical detect ion of spin-charge conversion in lateral spin valves”\, S. Cavill\, C. H uang\, M. Offidani\, Y.-H. Lin\, M. Cazalilla and A. Ferreira\, Phys. Rev. Lett. 124 (2020).

[3] “Theory of spin-char ge-coupled transport in proximitized graphene: an SO(5) algebraic approach ”\, A. Ferreira\, J. Phys. Mater. 4\, 045006 (2021).

[4] “Twist angle controlled collinear Edelstein effect in van der Waals heterostructures”\, A. Veneri\, D. Perkins\, C. Péterfalvi an d A. Ferreira\, Phys. Rev. B 106\, L081405 (2022).

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