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

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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