The coexistence of Dirac cones and Fermi arcs in a graphene/WTe 2 heterostructure
Source abstract
Abstract
We report on the electronic properties of a van der Waals heterostructure formed by graphene and a type-II Weyl semimetal (Td-WTe2), hosting features of both Dirac and Weyl semimetals. By combining angle-resolved photoemission spectroscopy (ARPES), scanning tunnelling microscopy and spectroscopy (STM/STS), and density functional theory (DFT) calculations, we directly visualise how the interlayer interaction modifies the electronic structures of both materials in the heterostructure. Furthermore, STM reveals that the local twist angle between the graphene and the Weyl semimetal affects the appearance of moiré patterns in the heterostructure, which in turn suggests a twist-angle-dependent modulation of the interlayer interaction. Finally, we also show XPS 4d lines splitting for Te related to the local environment of tellurium atoms. Our findings highlight the importance of controlling twist angles and interlayer interactions for electronics and twistronics applications based on novel quantum materials.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Topological Materials and Phenomena · 2D Materials and Applications · Graphene research and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Solid State Physics, Faculty of Physics and Applied Informatics, University of Lodz, Pomorska 149/153, 90-236 Łódź, Poland
Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 3, 9747 AG Groningen, The Netherlands
SOLARIS National Synchrotron Radiation Centre, Jagiellonian University, Krakow, Poland
Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland
Institute of High Pressure Physics, Polish Academy of Sciences, ul. Sokołowska 29/37, 01-142 Warsaw, Poland
IHP- Leibniz Institute for High Performance Microelectronics, Im Technologiepark 25, 15236, Frankfurt (Oder), Germany
Department of Physics and Astronomy, University of Missouri, Columbia, Missouri 65211, USA
Funding
Ministerstwo Edukacji i Nauki · Basic Energy Sciences · Narodowe Centrum Nauki
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