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Orderly disorder in magic-angle twisted trilayer graphene.

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Title: Orderly disorder in magic-angle twisted trilayer graphene.
Authors: Turkel, Simon, Swann, Joshua, Zhu, Ziyan, Christos, Maine, Watanabe, K., Taniguchi, T., Sachdev, Subir, Scheurer, Mathias S., Kaxiras, Efthimios, Dean, Cory R., Pasupathy, Abhay N.
Source: Science (pre-March 2025). 4/8/2022, Vol. 376 Issue 6589, p193-199. 7p. 4 Diagrams.
Subjects: Graphene, Electric properties, Superconductivity, Scanning tunneling microscopy, Low temperatures
Abstract: Magic-angle twisted trilayer graphene (TTG) has recently emerged as a platform to engineer strongly correlated flat bands. We reveal the normal-state structural and electronic properties of TTG using low-temperature scanning tunneling microscopy at twist angles for which superconductivity has been observed. Real trilayer samples undergo a strong reconstruction of the moiré lattice, which locks layers into near-magic-angle, mirror symmetric domains comparable in size with the superconducting coherence length. This relaxation introduces an array of localized twist-angle faults, termed twistons and moiré solitons, whose electronic structure deviates strongly from the background regions, leading to a doping-dependent, spatially granular electronic landscape. The Fermi-level density of states is maximally uniform at dopings for which superconductivity has been observed in transport measurements. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: <searchLink fieldCode="AR" term="%22Turkel%2C+Simon%22">Turkel, Simon</searchLink><br /><searchLink fieldCode="AR" term="%22Swann%2C+Joshua%22">Swann, Joshua</searchLink><br /><searchLink fieldCode="AR" term="%22Zhu%2C+Ziyan%22">Zhu, Ziyan</searchLink><br /><searchLink fieldCode="AR" term="%22Christos%2C+Maine%22">Christos, Maine</searchLink><br /><searchLink fieldCode="AR" term="%22Watanabe%2C+K%2E%22">Watanabe, K.</searchLink><br /><searchLink fieldCode="AR" term="%22Taniguchi%2C+T%2E%22">Taniguchi, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Sachdev%2C+Subir%22">Sachdev, Subir</searchLink><br /><searchLink fieldCode="AR" term="%22Scheurer%2C+Mathias+S%2E%22">Scheurer, Mathias S.</searchLink><br /><searchLink fieldCode="AR" term="%22Kaxiras%2C+Efthimios%22">Kaxiras, Efthimios</searchLink><br /><searchLink fieldCode="AR" term="%22Dean%2C+Cory+R%2E%22">Dean, Cory R.</searchLink><br /><searchLink fieldCode="AR" term="%22Pasupathy%2C+Abhay+N%2E%22">Pasupathy, Abhay N.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 4/8/2022, Vol. 376 Issue 6589, p193-199. 7p. 4 Diagrams.
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  Data: <searchLink fieldCode="DE" term="%22Graphene%22">Graphene</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+properties%22">Electric properties</searchLink><br /><searchLink fieldCode="DE" term="%22Superconductivity%22">Superconductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+tunneling+microscopy%22">Scanning tunneling microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Low+temperatures%22">Low temperatures</searchLink>
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  Data: Magic-angle twisted trilayer graphene (TTG) has recently emerged as a platform to engineer strongly correlated flat bands. We reveal the normal-state structural and electronic properties of TTG using low-temperature scanning tunneling microscopy at twist angles for which superconductivity has been observed. Real trilayer samples undergo a strong reconstruction of the moiré lattice, which locks layers into near-magic-angle, mirror symmetric domains comparable in size with the superconducting coherence length. This relaxation introduces an array of localized twist-angle faults, termed twistons and moiré solitons, whose electronic structure deviates strongly from the background regions, leading to a doping-dependent, spatially granular electronic landscape. The Fermi-level density of states is maximally uniform at dopings for which superconductivity has been observed in transport measurements. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Superconductivity
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              Text: 4/8/2022
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