Chiral superconductivity with enhanced quantized Hall responses in moiré transition metal dichalcogenides
Abstract Experimental demonstrations of tunable correlation effects in magic-angle twisted bilayer graphene have put two-dimensional moiré quantum materials at the forefront of condensed-matter research. Other twisted few-layer graphitic structures, boron-nitride, and homo- or hetero-stacks of trans...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-10-01
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| Series: | npj Quantum Materials |
| Online Access: | https://doi.org/10.1038/s41535-022-00504-z |
| _version_ | 1811226694057459712 |
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| author | Michael M. Scherer Dante M. Kennes Laura Classen |
| author_facet | Michael M. Scherer Dante M. Kennes Laura Classen |
| author_sort | Michael M. Scherer |
| collection | DOAJ |
| description | Abstract Experimental demonstrations of tunable correlation effects in magic-angle twisted bilayer graphene have put two-dimensional moiré quantum materials at the forefront of condensed-matter research. Other twisted few-layer graphitic structures, boron-nitride, and homo- or hetero-stacks of transition metal dichalcogenides (TMDs) have further enriched the opportunities for analysis and utilization of correlations in these systems. Recent experiments within the latter material class confirmed the relevance of many-body interactions and demonstrated the importance of their extended range. Since the interaction, its range, and the filling can be tuned experimentally by twist angle, substrate engineering and gating, we here explore Fermi surface instabilities and resulting phases of matter of hetero-bilayer TMDs. Using an unbiased renormalization group approach, we establish in particular that hetero-bilayer TMDs are platforms to realize topological superconductivity with winding number $$| {{{\mathcal{N}}}}| =4$$ ∣ N ∣ = 4 . We show that this state reflects in pronounced experimental signatures, such as distinct quantum Hall features. |
| first_indexed | 2024-04-12T09:29:38Z |
| format | Article |
| id | doaj.art-b81fc9e25cf3497da6475f9bf9c7a8d3 |
| institution | Directory Open Access Journal |
| issn | 2397-4648 |
| language | English |
| last_indexed | 2024-04-12T09:29:38Z |
| publishDate | 2022-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Materials |
| spelling | doaj.art-b81fc9e25cf3497da6475f9bf9c7a8d32022-12-22T03:38:24ZengNature Portfolionpj Quantum Materials2397-46482022-10-01711910.1038/s41535-022-00504-zChiral superconductivity with enhanced quantized Hall responses in moiré transition metal dichalcogenidesMichael M. Scherer0Dante M. Kennes1Laura Classen2Institut für Theoretische Physik III, Ruhr-Universität BochumInstitute for Theory of Statistical Physics, RWTH Aachen University, and JARA Fundamentals of Future Information TechnologyCondensed Matter Physics & Materials Science Division, Brookhaven National LaboratoryAbstract Experimental demonstrations of tunable correlation effects in magic-angle twisted bilayer graphene have put two-dimensional moiré quantum materials at the forefront of condensed-matter research. Other twisted few-layer graphitic structures, boron-nitride, and homo- or hetero-stacks of transition metal dichalcogenides (TMDs) have further enriched the opportunities for analysis and utilization of correlations in these systems. Recent experiments within the latter material class confirmed the relevance of many-body interactions and demonstrated the importance of their extended range. Since the interaction, its range, and the filling can be tuned experimentally by twist angle, substrate engineering and gating, we here explore Fermi surface instabilities and resulting phases of matter of hetero-bilayer TMDs. Using an unbiased renormalization group approach, we establish in particular that hetero-bilayer TMDs are platforms to realize topological superconductivity with winding number $$| {{{\mathcal{N}}}}| =4$$ ∣ N ∣ = 4 . We show that this state reflects in pronounced experimental signatures, such as distinct quantum Hall features.https://doi.org/10.1038/s41535-022-00504-z |
| spellingShingle | Michael M. Scherer Dante M. Kennes Laura Classen Chiral superconductivity with enhanced quantized Hall responses in moiré transition metal dichalcogenides npj Quantum Materials |
| title | Chiral superconductivity with enhanced quantized Hall responses in moiré transition metal dichalcogenides |
| title_full | Chiral superconductivity with enhanced quantized Hall responses in moiré transition metal dichalcogenides |
| title_fullStr | Chiral superconductivity with enhanced quantized Hall responses in moiré transition metal dichalcogenides |
| title_full_unstemmed | Chiral superconductivity with enhanced quantized Hall responses in moiré transition metal dichalcogenides |
| title_short | Chiral superconductivity with enhanced quantized Hall responses in moiré transition metal dichalcogenides |
| title_sort | chiral superconductivity with enhanced quantized hall responses in moire transition metal dichalcogenides |
| url | https://doi.org/10.1038/s41535-022-00504-z |
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