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Four experiments in Topological Superconductivity.

Total Cost €


EC-Contrib. €






Project "4-TOPS" data sheet

The following table provides information about the project.


Organization address
address: SANDERRING 2
postcode: 97070

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 Germany [DE]
 Total cost 2˙497˙567 €
 EC max contribution 2˙497˙567 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-ADG
 Funding Scheme ERC-ADG
 Starting year 2017
 Duration (year-month-day) from 2017-06-01   to  2022-05-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 


 Project objective

Topological materials have developed rapidly in recent years, with my previous ERC-AG project 3-TOP playing a major role in this development. While so far no bulk topological superconductor has been unambiguously demonstrated, their properties can be studied in a very flexible manner by inducing superconductivity through the proximity effect into the surface or edge states of a topological insulator. In 4-TOPS we will explore the possibilities of this approach in full, and conduct a thorough study of induced superconductivity in both two and three dimensional HgTe based topological insulators. The 4 avenues we will follow are:

-SQUID based devices to investigate full phase dependent spectroscopy of the gapless Andreev bound state by studying their Josephson radiation and current-phase relationships. -Experiments aimed at providing unambiguous proof of localized Majorana states in TI junctions by studying tunnelling transport into such states. -Attempts to induce superconductivity in Quantum Hall states with the aim of creating a chiral topological superconductor. These chiral superconductors host Majorana fermions at their edges, which, at least in the case of a single QH edge mode, follow non-Abelian statistics and are therefore promising for explorations in topological quantum computing. -Studies of induced superconductivity in Weyl semimetals, a completely unexplored state of matter.

Taken together, these four sets of experiments will greatly enhance our understanding of topological superconductivity, which is not only a subject of great academic interest as it constitutes the study of new phases of matter, but also has potential application in the field of quantum information processing.


year authors and title journal last update
List of publications.
2018 Ching Hua Lee, Stefan Imhof, Christian Berger, Florian Bayer, Johannes Brehm, Laurens W. Molenkamp, Tobias Kiessling, Ronny Thomale
Topolectrical Circuits
published pages: , ISSN: 2399-3650, DOI: 10.1038/s42005-018-0035-2
Communications Physics 1/1 2020-02-04
2019 Lukas Lunczer, Philipp Leubner, Martin Endres, Valentin L. Müller, Christoph Brüne, Hartmut Buhmann, Laurens W. Molenkamp
Approaching Quantization in Macroscopic Quantum Spin Hall Devices through Gate Training
published pages: 47701, ISSN: 0031-9007, DOI: 10.1103/physrevlett.123.047701
Physical Review Letters 123/4 2020-02-04
2017 A. Inhofer, S. Tchoumakov, B. A. Assaf, G. Fève, J. M. Berroir, V. Jouffrey, D. Carpentier, M. O. Goerbig, B. Plaçais, K. Bendias, D. M. Mahler, E. Bocquillon, R. Schlereth, C. Brüne, H. Buhmann, L. W. Molenkamp
Observation of Volkov-Pankratov states in topological HgTe heterojunctions using high-frequency compressibility
published pages: 195104, ISSN: 2469-9950, DOI: 10.1103/physrevb.96.195104
Physical Review B 96/19 2020-02-04
2019 Hechen Ren, Falko Pientka, Sean Hart, Andrew T. Pierce, Michael Kosowsky, Lukas Lunczer, Raimund Schlereth, Benedikt Scharf, Ewelina M. Hankiewicz, Laurens W. Molenkamp, Bertrand I. Halperin, Amir Yacoby
Topological superconductivity in a phase-controlled Josephson junction
published pages: 93-98, ISSN: 0028-0836, DOI: 10.1038/s41586-019-1148-9
Nature 569/7754 2020-02-04
2020 Jonas Strunz, Jonas Wiedenmann, Christoph Fleckenstein, Lukas Lunczer, Wouter Beugeling, Valentin L. Müller, Pragya Shekhar, Niccolò Traverso Ziani, Saquib Shamim, Johannes Kleinlein, Hartmut Buhmann, Björn Trauzettel, Laurens W. Molenkamp
Interacting topological edge channels
published pages: 83-88, ISSN: 1745-2473, DOI: 10.1038/s41567-019-0692-4
Nature Physics 16/1 2020-02-04
2019 Jan Hajer, Maximilian Kessel, Christoph Brüne, Martin P. Stehno, Hartmut Buhmann, Laurens W. Molenkamp
Proximity-Induced Superconductivity in CdTe–HgTe Core–Shell Nanowires
published pages: 4078-4082, ISSN: 1530-6984, DOI: 10.1021/acs.nanolett.9b01472
Nano Letters 19/6 2020-02-04
2017 Jonas Wiedenmann, Eva Liebhaber, Johannes Kübert, Erwann Bocquillon, Pablo Burset, Christopher Ames, Hartmut Buhmann, Teun M. Klapwijk, Laurens W. Molenkamp
Transport spectroscopy of induced superconductivity in the three-dimensional topological insulator HgTe
published pages: , ISSN: 2469-9950, DOI: 10.1103/physrevb.96.165302
Physical Review B 96/16 2019-03-11

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