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MiTopMat SIGNED

Microstructured Topological Materials: A novel route towards topological electronics

Total Cost €

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EC-Contrib. €

0

Partnership

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 MiTopMat project word cloud

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

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Project "MiTopMat" data sheet

The following table provides information about the project.

Coordinator
ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE 

Organization address
address: BATIMENT CE 3316 STATION 1
city: LAUSANNE
postcode: 1015
website: www.epfl.ch

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 Switzerland [CH]
 Total cost 1˙836˙070 €
 EC max contribution 1˙836˙070 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-STG
 Funding Scheme ERC-STG
 Starting year 2017
 Duration (year-month-day) from 2017-12-01   to  2022-11-30

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE CH (LAUSANNE) coordinator 1˙836˙070.00
2    MAX-PLANCK-GESELLSCHAFT ZUR FORDERUNG DER WISSENSCHAFTEN EV DE (Munich) participant 0.00

Map

 Project objective

Topological semi-metals such as Cd3As2 or TaAs are characterized by two bands crossing at isolated points in momentum space and a linear electronic dispersion around these crossing points. This linear dispersion can be mapped onto the Dirac- or Weyl-Hamiltonian, describing relativistic massless fermions, and thus relativistic phenomena from high-energy physics may appear in these materials. For example, the chirality, χ=±1, is a conserved quantity for massless fermions, separating the electrons into two distinct chiral species. A new class of topological electronics has been proposed based on chirality imbalance and chiral currents taking the role of charge imbalance and charge currents in electronics. Such devices promise technological advances in speed, energy efficiency, and quantum coherent processes at elevated temperatures.

We will research the basic physical phenomena on which topological electronics is based: 1) The ability to interact electrically with the chiral states in a topological semi-metal is an essential prerequisite for their application. We will investigate whether currents in the Fermi arc surface states can be induced by charge currents and selectively detected by voltage measurements. 2) Weyl materials are more robust against defects and therefore of interest for industrial fabrication. We will experimentally test this topological protection in high-field transport experiments in a wide range of Weyl materials. 3) Recently, topological processes leading to fast, tuneable and efficient voltage inversion were predicted. We will investigate the phenomenon, fabricate and characterize such inverters, and assess their performance. MiTopMat thus aims to build the first prototype of a topological voltage inverter.

These goals are challenging but achievable: MiTopMat’s research plan is based on Focused Ion Beam microfabrication, which we have successfully shown to be a promising route to fabricate chiral devices.

 Publications

year authors and title journal last update
List of publications.
2018 B. J. Ramshaw, K. A. Modic, Arkady Shekhter, Yi Zhang, Eun-Ah Kim, Philip J. W. Moll, Maja D. Bachmann, M. K. Chan, J. B. Betts, F. Balakirev, A. Migliori, N. J. Ghimire, E. D. Bauer, F. Ronning, R. D. McDonald
Quantum limit transport and destruction of the Weyl nodes in TaAs
published pages: , ISSN: 2041-1723, DOI: 10.1038/s41467-018-04542-9
Nature Communications 9/1 2019-09-02
2019 K. A. Modic, Tobias Meng, Filip Ronning, Eric D. Bauer, Philip J. W. Moll, B. J. Ramshaw
Thermodynamic Signatures of Weyl Fermions in NbP
published pages: , ISSN: 2045-2322, DOI: 10.1038/s41598-018-38161-7
Scientific Reports 9/1 2019-09-02
2018 Hao Yang, Marcus Schmidt, Vicky Süss, Mun Chan, Fedor F Balakirev, Ross D McDonald, Stuart S P Parkin, Claudia Felser, Binghai Yan, Philip J W Moll
Quantum oscillations in the type-II Dirac semi-metal candidate PtSe 2
published pages: 43008, ISSN: 1367-2630, DOI: 10.1088/1367-2630/aab32f
New Journal of Physics 20/4 2019-09-02
2019 Gavin B. Osterhoudt, Laura K. Diebel, Mason J. Gray, Xu Yang, John Stanco, Xiangwei Huang, Bing Shen, Ni Ni, Philip J. W. Moll, Ying Ran, Kenneth S. Burch
Colossal mid-infrared bulk photovoltaic effect in a type-I Weyl semimetal
published pages: 471-475, ISSN: 1476-1122, DOI: 10.1038/s41563-019-0297-4
Nature Materials 18/5 2019-09-02

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