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Revealing 1D ballistic charge and spin currents in second order topological insulators

Total Cost €


EC-Contrib. €






 BALLISTOP project word cloud

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

temperature    achievement    class    edge    surfaces    hinge    coexist    single    greatest    magnetism    electron    ti    superconductor    physics    spectroscopies    insulating    possibilities    2dti    bismuth    electric    conduction    bulk    perfectly    propagating    spatial    explaining    discovery    lastly    nature    orientation    modes    quantum    edges    counter    platelets    crystalline    frequency    conduct    probe    effect    sensitivity    spin    transport    dissipationlessly    2dtis    opens    currents    refined    predicted    charge    belong    direction    computing    nanowires    condensed    crystals    shown    topologically    helical    paths    quasi    conducting    detect    tools    tis    ideal    3d    soti    locked    realize    discovered    equilibrium    superconducting    character    intriguing    surface    orbital    ranging    avenues    samples    dissipationless    hall    insulators    hybrid    existence    materials    bi    newly    velocity    propagation    ballisticity    circuits    topological    experimental    sotis    ballistic    semimetallic    1d    room    transistors    one    magnetometers    majorana    electrometers    reveal    proximity    despite    protected    tunnel    dominated   

Project "BALLISTOP" data sheet

The following table provides information about the project.


Organization address
address: RUE MICHEL ANGE 3
city: PARIS
postcode: 75794

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 2˙432˙676 €
 EC max contribution 2˙432˙676 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2018-ADG
 Funding Scheme ERC-ADG
 Starting year 2020
 Duration (year-month-day) from 2020-04-01   to  2025-03-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

One of the greatest recent achievement in Condensed matter physics is the discovery of a new class of materials, Topological Insulators (TI), whose bulk is insulating, while the edges conduct current in a quasi-ideal way. In particular, the 1D edges of 2DTI realize the Quantum Spin Hall state, where current is carried dissipationlessly by two counter-propagating ballistic edge states with a spin orientation locked to that of the propagation direction (a helical edge state). This opens many possibilities, ranging from dissipationless charge and spin transport at room temperature to new avenues for quantum computing. We propose to investigate charge and spin currents in a newly discovered class of TIs, Second Order Topological Insulators (SOTIs), i.e. 3D crystals with insulating bulk and surfaces, but perfectly conducting (topologically protected) 1D helical “hinge” states. Bismuth, despite its well-known semimetallic character, has recently been shown theoretically to belong to this class of materials, explaining our recent intriguing findings on nanowires. Our goal is to reveal, characterize and exploit the unique properties of SOTIs, in particular the high velocity, ballistic, and dissipationless hinge currents. We will probe crystalline bismuth samples with refined new experimental tools. The superconducting proximity effect will reveal the spatial distribution of conduction paths, and test the ballisticity of the hinge modes (that may coexist with non-topological surface modes). High frequency and tunnel spectroscopies of hybrid superconductor/Bi circuits will probe their topological nature, including the existence of Majorana modes. We will use high sensitivity magnetometers to detect the orbital magnetism of SOTI platelets, which should be dominated by topological edge currents. Lastly, we propose to detect the predicted equilibrium spin currents in 2DTIs and SOTIs via the generated electric field, using single electron transistors-based electrometers.

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

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