• 文献标题:   Orderly disorder in magic-angle twisted trilayer graphene
  • 文献类型:   Article
  • 作  者:   TURKEL S, SWANN J, ZHU ZY, CHRISTOS M, WATANABE K, TANIGUCHI T, SACHDEV S, SCHEURER MS, KAXIRAS E, DEAN CR, PASUPATHY AN
  • 作者关键词:  
  • 出版物名称:   SCIENCE
  • ISSN:   0036-8075 EI 1095-9203
  • 通讯作者地址:  
  • 被引频次:   29
  • DOI:   10.1126/science.abk1895
  • 出版年:   2022

▎ 摘  要

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 moire 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 moire 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.