Orderly disorder in magic-angle twisted trilayer graphene
- Department of Physics, Columbia University, New York, NY 10027, USA.; OSTI
- Department of Physics, Columbia University, New York, NY 10027, USA.
- Department of Physics, Harvard University, Cambridge, MA 02138, USA.
- Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
- Department of Physics, Harvard University, Cambridge, MA 02138, USA.; School of Natural Sciences, Institute for Advanced Study, Princeton, NJ 08540, USA.
- Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria.
- Department of Physics, Harvard University, Cambridge, MA 02138, USA.; John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
- Department of Physics, Columbia University, New York, NY 10027, USA.; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USA.
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.
- Research Organization:
- Columbia Univ., New York, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- SC0019443
- OSTI ID:
- 1980734
- Journal Information:
- Science, Journal Name: Science Journal Issue: 6589 Vol. 376; ISSN 0036-8075
- Publisher:
- AAAS
- Country of Publication:
- United States
- Language:
- English
Similar Records
Local atomic stacking and symmetry in twisted graphene trilayers