Designing flat bands by strain

Zhen Bi, Noah F.Q. Yuan, Liang Fu

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

We study the effects of heterostrain on moiré bands in twisted bilayer graphene and bilayer transition metal dichalcogenide (TMD) systems. For bilayer graphene with a twist angle near 1, we show that heterostrain significantly increases the energy separation between conduction and valence bands as well as the Dirac velocity at charge neutrality, which resolves several puzzles in scanning tunneling spectroscopy and quantum oscillation experiments at once. For bilayer TMD, we show that applying small heterostrain generally leads to flat moiré bands that are highly tunable.

Original languageEnglish (US)
Article number035448
JournalPhysical Review B
Volume100
Issue number3
DOIs
StatePublished - Jul 31 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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