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  Doping fingerprints of spin and lattice fluctuations in moiré superlattice systems

Witt, N., Pizarro, J. M., Berges, J., Nomoto, T., Arita, R., & Wehling, T. O. (2022). Doping fingerprints of spin and lattice fluctuations in moiré superlattice systems. Physical Review B, 105(24): L241109. doi:10.1103/PhysRevB.105.L241109.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-000A-9EAE-1 Versions-Permalink: https://hdl.handle.net/21.11116/0000-000B-F5E6-D
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PhysRevB.105.L241109.pdf (Verlagsversion), 2MB
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https://hdl.handle.net/21.11116/0000-000A-9EB0-D
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PhysRevB.105.L241109.pdf
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2022
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© American Physical Society
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twistFLEX_v2_SM.pdf (Ergänzendes Material), 6MB
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https://hdl.handle.net/21.11116/0000-000A-9EB1-C
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twistFLEX_v2_SM.pdf
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Supplemental Material: The Supplemental Material contains 10 sections with details on the low-energy continuum model, the construction of the Wannier orbitals, a discussion of electrostatic, long-range Hartree potential effects, an estimation of the on-site and nearest-neighbor Coulomb interaction, numerical details on the FLEX calculations, a discussion on the nature of magnetic ordering and the spin susceptibility structure, the temperature dependence of the d- and f-wave superconducting eigenvalues and order parameters, a discussion of the influence of band asymmetry, details on superconductivity arising from non-local dispersive phonons, and an estimation of the phonon-induced attractive interaction.
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externe Referenz:
https://doi.org/10.1103/PhysRevB.105.L241109 (Verlagsversion)
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https://arxiv.org/abs/2108.01121 (Preprint)
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 Urheber:
Witt, N.1, 2, 3, Autor
Pizarro, J. M.1, 4, Autor           
Berges, J.1, Autor
Nomoto, T.5, Autor
Arita, R.5, 6, Autor
Wehling, T. O.1, 2, 3, Autor
Affiliations:
1Institute of Theoretical Physics, Bremen Center for Computational Materials Science, and MAPEX Center for Materials and Processes, University of Bremen, ou_persistent22              
2I. Institute of Theoretical Physics, University of Hamburg, ou_persistent22              
3The Hamburg Centre for Ultrafast Imaging, ou_persistent22              
4Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              
5Department of Applied Physics, The University of Tokyo, ou_persistent22              
6RIKEN Center for Emergent Matter Science, ou_persistent22              

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 Zusammenfassung: Twisted Van der Waals systems offer the unprecedented possibility to tune different states of correlated quantum matter with external noninvasive electrostatic doping. The nature of the superconducting order presents a recurring open question in this context. In this work, we assess quantitatively the case of spin-fluctuation-mediated pairing for Γ-valley twisted transition metal dichalcogenide homobilayers. We calculate self-consistently and dynamically the doping-dependent superconducting transition temperature Tc revealing a superconducting dome with a maximal Tc≈0.1–1K depending on twist angle. We compare our results with conventional phonon-mediated superconductivity, and we identify clear fingerprints in the doping dependence of Tc, which enable experiments to distinguish between different pairing mechanisms.

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Sprache(n): eng - English
 Datum: 2022-03-182021-08-122022-05-262022-06-132022-06-15
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1103/PhysRevB.105.L241109
arXiv: 2108.01121
 Art des Abschluß: -

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Projektname : We acknowledge support and funding by the Deutsche Forschungsgemeinschaft (DFG) via RTG 2247 ( QM3) (Project No. 286518848), via the priority program SPP 2244 (Project No. 422707584), via EXC 2077 (University Allowance, University of Bremen, Project No. 390741603), and via the Cluster of Excellence ‘CUI: Advanced Imaging of Matter' – EXC 2056 (Project No. 390715994). Funding from the European Commission via the Graphene Flagship Core Project 3 (Grant Agreement ID: 881603) and computing time at the HLRN facilities (Berlin and Göttingen) are acknowledged. This work was supported by a Grant-in-Aid for Scientific Research (No. 19H05825) by MEXT and by JST PRESTO (No. JPMJPR20L7), Japan.
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Quelle 1

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Titel: Physical Review B
  Kurztitel : Phys. Rev. B
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Woodbury, NY : American Physical Society
Seiten: - Band / Heft: 105 (24) Artikelnummer: L241109 Start- / Endseite: - Identifikator: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008