$4\pi$ periodic Andreev bound states in a Dirac semimetal
Chuan Li,Jorrit Cornelis de Boer,Bob de Ronde,S. V. Ramankutty,Erik van Heumen,Yingkai Huang,Anne de Visser,Alexander A. Golubov,Mark S. Golden,Alexander Brinkman +9 more
Reads0
Chats0
TLDR
In this paper, phase-sensitive junction technology is used to induce superconductivity in a Dirac semimetal and radio frequency irradiation experiments reveal a significant contribution of 4$\pi$-periodic Andreev bound states to the supercurrent in Nb-Bi${0.97}$Sb$_{0.03}$-Nb Josephson junctions.Abstract:
Electrons in a Dirac semimetals possess linear dispersion in all three spatial dimensions, and form part of a developing platform of novel quantum materials. Bi$_{1-x}$Sb$_x$ supports a three-dimensional Dirac cone at the Sb-induced band inversion point. Nanoscale phase-sensitive junction technology is used to induce superconductivity in this Dirac semimetal. Radio frequency irradiation experiments reveal a significant contribution of 4$\pi$-periodic Andreev bound states to the supercurrent in Nb-Bi$_{0.97}$Sb$_{0.03}$-Nb Josephson junctions. The conditions for a substantial $4\pi$ contribution to the supercurrent are favourable because of the Dirac cone's topological protection against backscattering, providing very broad transmission resonances. The large g-factor of the Zeeman effect from a magnetic field applied in the plane of the junction, allows tuning of the Josephson junctions from 0 to $\pi$ regimes.read more
Citations
More filters
Journal ArticleDOI
High-Temperature Majorana Corner States.
TL;DR: This work shows the emergence of one Majorana Kramers pair at each corner of a square-shaped 2D topological insulator proximitized by an s-wave (e.g., Fe-based) superconductor and obtains a phase diagram that addresses the relaxation of crystal symmetry and edge orientation.
Journal ArticleDOI
Transport in two-dimensional topological materials: recent developments in experiment and theory
TL;DR: In this article, the authors review theoretical and experimental highlights in transport in two-dimensional materials focussing on key developments over the last five years, where fundamental questions are once more being asked about the intertwining roles of the Berry curvature and disorder scattering.
Journal ArticleDOI
Spin-Orbit induced phase-shift in Bi 2 Se 3 Josephson junctions
Alexandre Assouline,Cheryl Feuillet-Palma,Nicolas Bergeal,Tianzhen Zhang,Alireza Mottaghizadeh,Alexandre Zimmers,Emmanuel Lhuillier,Mahmoud Eddrie,Paola Atkinson,Marco Aprili,Hervé Aubin,Hervé Aubin +11 more
TL;DR: The observation of an anomalous phase shift φ0 in hybrid Josephson junctions fabricated with the topological insulator Bi2Se3 submitted to an in-plane magnetic field is observed, opening opportunities for phase-controlled Josephson devices.
Journal ArticleDOI
Selective area growth and stencil lithography for in situ fabricated quantum devices
Peter Schüffelgen,Daniel Rosenbach,Chuan Li,Tobias W. Schmitt,Tobias W. Schmitt,Michael Schleenvoigt,Abdur Rehman Jalil,Sarah Schmitt,Jonas Kölzer,Meng Wang,Meng Wang,Benjamin Bennemann,Umut Parlak,Lidia Kibkalo,Stefan Trellenkamp,Thomas Grap,Doris Meertens,Martina Luysberg,Gregor Mussler,Erwin Berenschot,Niels Roelof Tas,Alexander A. Golubov,Alexander Brinkman,Thomas Schäpers,Detlev Grützmacher +24 more
TL;DR: An in situ only fabrication process for networks of topological insulator–superconductor Josephson junctions with high interface transparency is introduced, which holds some potential for the production of future topological quantum computing networks.
Journal ArticleDOI
Topological Semimetal Nanostructures: From Properties to Topotronics.
TL;DR: Several important aspects that should receive great effort in the future of topological semimetal technology are discussed, including controllable synthesis, manipulation of quantum states, topological field effect transistors, spintronic applications, and topological quantum computation.
References
More filters
Journal ArticleDOI
Topological insulators and superconductors
Xiao-Liang Qi,Shou-Cheng Zhang +1 more
TL;DR: Topological superconductors are new states of quantum matter which cannot be adiabatically connected to conventional insulators and semiconductors and are characterized by a full insulating gap in the bulk and gapless edge or surface states which are protected by time reversal symmetry.
Journal ArticleDOI
Superconducting Proximity Effect and Majorana Fermions at the Surface of a Topological Insulator
Liang Fu,Charles L. Kane +1 more
TL;DR: It is shown that linear junctions between superconductors mediated by the topological insulator form a nonchiral one-dimensional wire for Majorana fermions, and that circuits formed from these junctions provide a method for creating, manipulating, and fusing Majorana bound states.
Journal ArticleDOI
Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices
Vincent Mourik,K. Zuo,Sergey Frolov,Sebastien Plissard,Epam Erik Bakkers,Epam Erik Bakkers,Leo P. Kouwenhoven +6 more
TL;DR: Electrical measurements on indium antimonide nanowires contacted with one normal (gold) and one superconducting (niobium titanium nitride) electrode support the hypothesis of Majorana fermions in Nanowires coupled to superconductors.
Journal ArticleDOI
A topological Dirac insulator in a quantum spin Hall phase
TL;DR: In this article, the authors used incident-photon-energy-modulated angle-resolved photoemission spectroscopy (IPEM-ARPES) to locate the Kramers points at the sample's boundary and provide a comprehensive mapping of the Dirac insulator's gapless surface electron bands.
Journal ArticleDOI
Discovery of a Three-Dimensional Topological Dirac Semimetal, Na3Bi
Zhongkai Liu,Bo Zhou,Bo Zhou,Yong Zhang,Zhijun Wang,Hongming Weng,Dharmalingam Prabhakaran,Sung-Kwan Mo,Zhi-Xun Shen,Zhong Fang,Xi Dai,Zahid Hussain,Yulin Chen,Yulin Chen +13 more
TL;DR: In this article, 3D Dirac fermions with linear dispersions along all momentum directions were detected in 3D topological Dirac semimetals (TDSs) with angle-resolved photoemission spectroscopy.