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TUNNEL SIGNED

Tunneling Spectroscopy in van-der-Waals Device

Total Cost €

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EC-Contrib. €

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Partnership

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 TUNNEL project word cloud

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

expanding    sensitive    hexagonal    manifest    full    electrode    andreev    breakthrough    insulators    temperatures    fabrication    technique    powerful    surfaces    ev    majorana    carriers    equilibrium    reveal    fault    deposited    extended    extracting    parallel    coupled    der    expand    advantages    realizing    utilize    place    interfaces    unprecedented    interaction    limited    dispersions    nitride    experimental    surface    momentum    stm    takes    details    smooth    vortex    injecting    hence    stack    fermi    graphene    effort    materials    boron    injected    waals    topological    statistics    tis    spectra    modifications    decisive    ultrathin    superconductors    bound    sought    relaxation    quantum    interface    direction    layered    probing    realize    tunneling    significantly    josephson    mechanically    geometry    vertical    tunnel    tuning    layers    hbn    tolerant    magnetic    energy    picture    device    tackling    geometries    lower    single    ideal    resolved    junction    conserving    probe    dielectrics    platform    resolution    barriers    mu    electron    density    2d    spectroscopy    van    unusual    artificial    knob    form    mode    computation    structures   

Project "TUNNEL" data sheet

The following table provides information about the project.

Coordinator
THE HEBREW UNIVERSITY OF JERUSALEM 

Organization address
address: EDMOND J SAFRA CAMPUS GIVAT RAM
city: JERUSALEM
postcode: 91904
website: www.huji.ac.il

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 Israel [IL]
 Total cost 1˙499˙875 €
 EC max contribution 1˙499˙875 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2014-STG
 Funding Scheme ERC-STG
 Starting year 2015
 Duration (year-month-day) from 2015-05-01   to  2020-04-30

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    THE HEBREW UNIVERSITY OF JERUSALEM IL (JERUSALEM) coordinator 1˙499˙875.00

Map

 Project objective

I will expand the experimental reach of tunneling spectroscopy to new materials and device geometries. The technique is ideal for tackling two challenges: (i) Probing Andreev bound states and Majorana states in graphene and topological insulators (TIs) coupled to superconductors, and (ii) realizing momentum-conserving tunneling. I will utilize a breakthrough in device fabrication to stack layered van-der-Waals materials, such as graphene and hexagonal Boron Nitride (hBN), to form vertical structures. Ultrathin layers of mechanically deposited dielectrics will be used as tunnel-barriers. These can interface any smooth surface, expanding the range of possible device-based tunneling systems. A tunnel junction has decisive advantages over STM in access to lower temperatures and hence higher energy resolution. Significantly, the effort to probe the energy spectra of graphene and TIs coupled to superconductors is often resolution-limited. I will develop artificial-vortex devices and Josephson devices where induced spectra are expected to reveal the Majorana mode, a quantum state of unusual statistics sought as a platform for fault-tolerant quantum computation. Using the same technology, I will develop devices where tunneling takes place between extended states. The aim is to realize momentum resolved tunneling for μeV-resolution measurement of dispersions in graphene, other 2D systems, and smooth interfaces. Momentum control will be achieved using density-tuning of the Fermi surfaces or using parallel magnetic field. The high resolution spectra will reveal details of interaction effects, manifest as modifications to the single-electron picture. Carriers can be injected into a system with full control over their direction and energy – a powerful experimental knob, useful for injecting carriers using one electrode and extracting them in another. Such geometry is sensitive to relaxation effects, and will allow unprecedented resolution studies of out-of-equilibrium systems.

 Publications

year authors and title journal last update
List of publications.
2017 A. Zalic, T. Dvir, H. Steinberg
High-density carriers at a strongly coupled interface between graphene and a three-dimensional topological insulator
published pages: , ISSN: 2469-9950, DOI: 10.1103/PhysRevB.96.075104
Physical Review B 96/7 2019-05-29
2018 T. Dvir, F. Massee, L. Attias, M. Khodas, M. Aprili, C. H. L. Quay, H. Steinberg
Spectroscopy of bulk and few-layer superconducting NbSe2 with van der Waals tunnel junctions
published pages: , ISSN: 2041-1723, DOI: 10.1038/s41467-018-03000-w
Nature Communications 9/1 2019-05-29

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