JOURNAL ARTICLE

Strain-induced massless Dirac fermion state of the molecular conductor α-(BEDT-TTF)2I3.

  • Published In: Applied Physics Letters, 2023, v. 122, n. 12. P. 1 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Kawasugi, Yoshitaka; Suzuki, Haruto; Yamamoto, Hiroshi M.; Kato, Reizo; Tajima, Naoya 3 of 3

Abstract

The article focuses on realizing the massless Dirac electron state in the molecular conductor α-(BEDT-TTF)₂I₃ by applying uniaxial bending strain instead of high hydrostatic pressure. α-(BEDT-TTF)₂I₃, a quasi-two-dimensional molecular system, exhibits a metal–insulator transition at ambient pressure and enters the Dirac fermion phase only above 15 kbar hydrostatic pressure. The study demonstrates that applying less than 1% uniaxial strain via bending a flexible substrate suppresses this transition and induces the Dirac state, as evidenced by characteristic magnetoresistance behavior linked to the n = 0 Landau level. This strain method allows surface-sensitive measurements without encapsulating the sample in a pressure cell and may enable broader experimental access to Dirac physics in this and similar materials.

Additional Information

  • Source:Applied Physics Letters. 2023/03, Vol. 122, Issue 12, p1
  • Document Type:Article
  • Subject Area:Science
  • Publication Date:2023
  • ISSN:0003-6951
  • DOI:10.1063/5.0141023
  • Accession Number:162676003
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