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Preservation of Topological Surface States in Millimeter-Scale Transferred Membranes.
Ip, Chi Ian Jess; Gao, Qiang; Nguyen, Khanh Duy; Yan, Chenhui; Yan, Gangbin; Hoenig, Eli; Marchese, Thomas S; Zhang, Minghao; Lee, Woojoo; Rokni, Hossein; Meng, Ying Shirley; Liu, Chong; Yang, Shuolong.
Afiliación
  • Ip CIJ; Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.
  • Gao Q; Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.
  • Nguyen KD; Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.
  • Yan C; Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.
  • Yan G; Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.
  • Hoenig E; Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.
  • Marchese TS; Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.
  • Zhang M; Department of NanoEngineering, University of California San Diego, La Jolla, California 92093, United States.
  • Lee W; Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.
  • Rokni H; Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.
  • Meng YS; Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.
  • Liu C; Department of NanoEngineering, University of California San Diego, La Jolla, California 92093, United States.
  • Yang S; Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States.
Nano Lett ; 24(25): 7557-7563, 2024 Jun 26.
Article en En | MEDLINE | ID: mdl-38758657
ABSTRACT
Ultrathin topological insulator membranes are building blocks of exotic quantum matter. However, traditional epitaxy of these materials does not facilitate stacking in arbitrary orders, while mechanical exfoliation from bulk crystals is also challenging due to the non-negligible interlayer coupling therein. Here we liberate millimeter-scale films of the topological insulator Bi2Se3, grown by molecular beam epitaxy, down to 3 quintuple layers. We characterize the preservation of the topological surface states and quantum well states in transferred Bi2Se3 films using angle-resolved photoemission spectroscopy. Leveraging the photon-energy-dependent surface sensitivity, the photoemission spectra taken with 6 and 21.2 eV photons reveal a transfer-induced migration of the topological surface states from the top to the inner layers. By establishing clear electronic structures of the transferred films and unveiling the wave function relocation of the topological surface states, our work lays the physics foundation crucial for the future fabrication of artificially stacked topological materials with single-layer precision.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos
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