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TWISTRONICS SIGNED

Probing topological valley currents by angular layer alignment in van der Waals heterostructures

Total Cost €

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EC-Contrib. €

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Partnership

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 TWISTRONICS project word cloud

Explore the words cloud of the TWISTRONICS project. It provides you a very rough idea of what is the project "TWISTRONICS" about.

twistronics    triad    valley    alter    inconclusive    topological    trace    twisted    measured    degree    emergence    protection    axes    powerful    van    angular    spin    graphene    transition    aligned    practical    supercurrents    few    carriers    transitions    flow    heterostructures    observations    alignment    superconductivity    origin    tune    crystal    bilayer    answering    certain    route    topologically    perturbations    previously    layer    advancements    observation    combined    correlated    freedom    vdw    predicted    striking    valleytronics    effect    bn    boron    electron    curvature    space    stacked    scarcity    heterostructure    experimental    trivial    berry    structures    intrinsic    questions    rigorous    waals    phases    remarkable    der    technologies    rotatable    quantum    topology    layers    fundamental    tools    dramatically    relative    nitride    electronic    dynamically    2d    dissipation    charge    protected    technological    currents    linked    investigation   

Project "TWISTRONICS" data sheet

The following table provides information about the project.

Coordinator
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS 

Organization address
address: RUE MICHEL ANGE 3
city: PARIS
postcode: 75794
website: www.cnrs.fr

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country France [FR]
 Total cost 1˙499˙543 €
 EC max contribution 1˙499˙543 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2019-STG
 Funding Scheme ERC-STG
 Starting year 2020
 Duration (year-month-day) from 2020-01-01   to  2024-12-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS FR (PARIS) coordinator 1˙499˙543.00

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 Project objective

The relative angular alignment between the stacked 2D layers of a van der Waals (vdW) heterostructure can dramatically alter its fundamental properties. A striking example is the recent observation of strongly correlated states and intrinsic superconductivity in twisted bilayer graphene. Another remarkable effect of angular layer alignment predicted for certain vdW heterostructures is the emergence of phases of matter with non-trivial topological properties, where charge carriers flow without dissipation, being protected against perturbations. In graphene aligned with boron nitride (BN), such a phase has been predicted, with topological protection linked not to the spin, as commonly observed, but rather to the valley degree of freedom. However, due to the scarcity of experimental tools to demonstrate this topological protection, or tune the transition between topologically trivial and non-trivial phases, the few experimental observations available remain inconclusive. The objective of TWISTRONICS is to contribute, with fundamental concepts, to future advancements of valleytronics, where the control over the valley degree of freedom is used for technological developments including quantum technologies. To reach this goal I propose a novel approach using dynamically rotatable heterostructures, combined with Berry curvature and real-space supercurrents distribution measurements, to tune and investigate the topological phases driven by crystal alignment on graphene/BN structures. This powerful triad will allow a rigorous investigation of the valley electronic states and phase transitions of this system, answering two important questions: i) What are the characteristics, origin and topology of the valley currents previously measured in graphene/BN aligned structures; and ii) how the valley currents and electron topology can be controlled by crystal axes alignment. This will trace a practical route to investigate and design topological phases in other vdW structures.

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The information about "TWISTRONICS" are provided by the European Opendata Portal: CORDIS opendata.

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