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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.

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

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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