Electric-Field Switchable Chirality in Rhombohedral Graphene Chern Insulators Stabilized by Tungsten Diselenide
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43932177" target="_blank" >RIV/60461373:22310/25:43932177 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prx/pdf/10.1103/PhysRevX.15.011052" target="_blank" >https://journals.aps.org/prx/pdf/10.1103/PhysRevX.15.011052</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevX.15.011052" target="_blank" >10.1103/PhysRevX.15.011052</a>
Alternative languages
Result language
angličtina
Original language name
Electric-Field Switchable Chirality in Rhombohedral Graphene Chern Insulators Stabilized by Tungsten Diselenide
Original language description
Chern insulators host topologically protected chiral edge currents with quantized conductance characterized by their Chern number. Switching the chirality of a Chern insulator, namely, the direction of the edge current, is highly challenging due to topologically forbidden backscattering but is of considerable importance for the design of topological devices. Nevertheless, this can be achieved by reversing the sign of the Chern number. Here, we report electrically switchable chirality in rhombohedral multilayer graphene-based Chern insulators through a topological phase transition. By introducing moire<acute accent> superlattices in rhombohedral heptalayer graphene, we observe a cascade of topological phase transitions at quarter electron filling of a moire<acute accent> band with the Chern number tunable from -1, 1, to 2. Furthermore, integrating monolayer tungsten diselenide at the moire<acute accent>less interface of rhombohedral decalayer graphene and hexagonal boron nitride superlattices stabilizes the Chern insulators, enabling quantized anomalous Hall resistance of h/2e2. Remarkably, the Chern number can be electrically switched using displacement fields, leading to a topological phase transition from -1 to 2. Our work establishes rhombohedral multilayer graphene moire<acute accent> superlattices as a versatile platform for topological engineering, with switchable chirality offering significant promise for integrating chiral edge currents into topological electronic circuits.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review X
ISSN
2160-3308
e-ISSN
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Volume of the periodical
15
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
nestránkováno
UT code for WoS article
001442587200001
EID of the result in the Scopus database
2-s2.0-86000560933