---
res:
  bibo_abstract:
  - The prediction and realization of topological insulators have sparked great interest
    in experimental approaches to the classification of materials1,2,3. The phase
    transition between non-trivial and trivial topological states is important, not
    only for basic materials science but also for next-generation technology, such
    as dissipation-free electronics4. It is therefore crucial to develop advanced
    probes that are suitable for a wide range of samples and environments. Here we
    demonstrate that circularly polarized laser-field-driven high-harmonic generation
    is distinctly sensitive to the non-trivial and trivial topological phases in the
    prototypical three-dimensional topological insulator bismuth selenide5. The phase
    transition is chemically initiated by reducing the spin–orbit interaction strength
    through the substitution of bismuth with indium atoms6,7. We find strikingly different
    high-harmonic responses of trivial and non-trivial topological surface states
    that manifest themselves as a conversion efficiency and elliptical dichroism that
    depend both on the driving laser ellipticity and the crystal orientation. The
    origins of the anomalous high-harmonic response are corroborated by calculations
    using the semiconductor optical Bloch equations with pairs of surface and bulk
    bands. As a purely optical approach, this method offers sensitivity to the electronic
    structure of the material, including its nonlinear response, and is compatible
    with a wide range of samples and sample environments.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Christian
      foaf_name: Heide, Christian
      foaf_surname: Heide
  - foaf_Person:
      foaf_givenName: Yuki
      foaf_name: Kobayashi, Yuki
      foaf_surname: Kobayashi
  - foaf_Person:
      foaf_givenName: Denitsa Rangelova
      foaf_name: Baykusheva, Denitsa Rangelova
      foaf_surname: Baykusheva
      foaf_workInfoHomepage: http://www.librecat.org/personId=71b4d059-2a03-11ee-914d-dfa3beed6530
  - foaf_Person:
      foaf_givenName: Deepti
      foaf_name: Jain, Deepti
      foaf_surname: Jain
  - foaf_Person:
      foaf_givenName: Jonathan A.
      foaf_name: Sobota, Jonathan A.
      foaf_surname: Sobota
  - foaf_Person:
      foaf_givenName: Makoto
      foaf_name: Hashimoto, Makoto
      foaf_surname: Hashimoto
  - foaf_Person:
      foaf_givenName: Patrick S.
      foaf_name: Kirchmann, Patrick S.
      foaf_surname: Kirchmann
  - foaf_Person:
      foaf_givenName: Seongshik
      foaf_name: Oh, Seongshik
      foaf_surname: Oh
  - foaf_Person:
      foaf_givenName: Tony F.
      foaf_name: Heinz, Tony F.
      foaf_surname: Heinz
  - foaf_Person:
      foaf_givenName: David A.
      foaf_name: Reis, David A.
      foaf_surname: Reis
  - foaf_Person:
      foaf_givenName: Shambhu
      foaf_name: Ghimire, Shambhu
      foaf_surname: Ghimire
  bibo_doi: 10.1038/s41566-022-01050-7
  bibo_issue: '9'
  bibo_volume: 16
  dct_date: 2022^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/1749-4885
  - http://id.crossref.org/issn/1749-4893
  dct_language: eng
  dct_publisher: Springer Nature@
  dct_subject:
  - Atomic and Molecular Physics
  - and Optics
  - Electronic
  - Optical and Magnetic Materials
  dct_title: Probing topological phase transitions using high-harmonic generation@
...