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TopoGraph SIGNED

Towards topological hybrid states in graphene

Total Cost €

0

EC-Contrib. €

0

Partnership

0

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 TopoGraph project word cloud

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

nanowire    solid    materials    single    correlations    trained    bilayer    engineer    graphite    expertise    micrometers    career    topological    lithographically    graphene    superconductivity    probes    tens    special    local    sc    smoking    filtering    obey    existence    tunnel    andreev    bound    quantum    wse2    phases    hybrid    spectra    pattern    exchange    property    1d    hall    gun    combines    fellow    first    nanodevices    nanostructures    signature    twisted    techniques    superconducting    concentrated    made    fermions    tips    soi    transition    probe    mfs    majorana    opens    measured    secondment    introduces    candidates    experimental    zeemann    inducing    spin    fundamentals    cell    prove    noise    secondments    platform    ballistic    excitations    frequency    scanning    dirac    2d    pressure    host    spectrum    topgraph    ultra    directions    relation    abelian    fraunhofer    significantly    structures    combed    basis    mf    either    reflect    choose    layer    protection    computation   

Project "TopoGraph" data sheet

The following table provides information about the project.

Coordinator
BUDAPESTI MUSZAKI ES GAZDASAGTUDOMANYI EGYETEM 

Organization address
address: MUEGYETEM RAKPART 3
city: BUDAPEST
postcode: 1111
website: www.bme.hu

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 Hungary [HU]
 Total cost 146˙239 €
 EC max contribution 146˙239 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2017
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2018
 Duration (year-month-day) from 2018-09-01   to  2020-08-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    BUDAPESTI MUSZAKI ES GAZDASAGTUDOMANYI EGYETEM HU (BUDAPEST) coordinator 146˙239.00

Map

 Project objective

Majorana fermions (MF) are novel excitations of solid-state nanostructures, which obey non-abelian exchange characteristics. This property, together with their topological protection made MFs candidates for basis of topological quantum computation. So far most of the experimental studies concentrated on 1D nanowire systems. In the project TopGraph we will choose a different path to engineer MFs using 2D systems. Our platform is graphene, a single layer of graphite, which has Dirac spectrum and can be ballistic over tens of micrometers. We will use two systems: 1) twisted bilayer graphene, which is driven into a special quantum Hall state (effectively a quantum spin Hall state) and 2) graphene with SOI induced by other 2D materials., e.g. WSe2 and combed with Zeemann fields. When inducing superconducting correlations to these structures the formation of MFs are expected. First, we will study SC current in these special states, where changes in the SC current and Fraunhofer pattern can reflect transition to topological phases. To prove the existence of the topological excitations, the Andreev bound state spectra of the system will be studied using local tunnel probes, either defined lithographically or using scanning tips. Finally smoking-gun signature of the topological current can be obtained from current phase relation measured using high frequency techniques (with the help of a secondment). The project combines the expertise of the fellow on graphene, with the know-how of the host on hybrid nanodevices and induced superconducting correlations. During the project the fellow will be trained by the host and the secondments in ultra-low-T measurement, scanning probe, dedicated noise filtering techniques, pressure cell studies and fundamentals of topological superconductivity. The proposal opens up new directions in topological computation in 2D materials, and introduces the fellow to this rapidly developing field, which will significantly advance his career.

 Publications

year authors and title journal last update
List of publications.
2019 Lujun Wang, Simon Zihlmann, Andreas Baumgartner, Jan Overbeck, Kenji Watanabe, Takashi Taniguchi, Péter Makk, Christian Schönenberger
In Situ Strain Tuning in hBN-Encapsulated Graphene Electronic Devices
published pages: 4097-4102, ISSN: 1530-6984, DOI: 10.1021/acs.nanolett.9b01491
Nano Letters 19/6 2020-04-11
2019 Lujun Wang, Simon Zihlmann, Ming-Hao Liu, Péter Makk, Kenji Watanabe, Takashi Taniguchi, Andreas Baumgartner, Christian Schönenberger
New Generation of Moiré Superlattices in Doubly Aligned hBN/Graphene/hBN Heterostructures
published pages: 2371-2376, ISSN: 1530-6984, DOI: 10.1021/acs.nanolett.8b05061
Nano Letters 19/4 2020-04-11
2019 Simon Zihlmann, Péter Makk, Sebastián Castilla, Jörg Gramich, Kishan Thodkar, Sabina Caneva, Ruizhi Wang, Stephan Hofmann, Christian Schönenberger
Nonequilibrium properties of graphene probed by superconducting tunnel spectroscopy
published pages: , ISSN: 2469-9950, DOI: 10.1103/physrevb.99.075419
Physical Review B 99/7 2020-04-11
2019 Minkyung Jung, Peter Rickhaus, Simon Zihlmann, Alexander Eichler, Peter Makk, Christian Schönenberger
GHz nanomechanical resonator in an ultraclean suspended graphene p–n junction
published pages: 4355-4361, ISSN: 2040-3364, DOI: 10.1039/c8nr09963d
Nanoscale 11/10 2020-04-11

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

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