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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.

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

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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