A novel quasi-one-dimensional topological insulator in bismuth iodide β-Bi4I4

Gabriel Autès, Anna Isaeva, Luca Moreschini, Jens C. Johannsen, Andrea Pisoni, Ryo Mori, Wentao Zhang, Taisia G. Filatova, Alexey N. Kuznetsov, László Forró, Wouter Van Den Broek, Yeongkwan Kim, Keun Su Kim, Alessandra Lanzara, Jonathan D. Denlinger, Eli Rotenberg, Aaron Bostwick, Marco Grioni, Oleg V. Yazyev

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Recent progress in the field of topological states of matter has largely been initiated by the discovery of bismuth and antimony chalcogenide bulk topological insulators (TIs; refs 3-6), followed by closely related ternary compounds and predictions of several weak TIs (refs 17-19). However, both the conceptual richness of Z2 classification of TIs as well as their structural and compositional diversity are far from being fully exploited. Here, a new Z2 topological insulator is theoretically predicted and experimentally confirmed in the β-phase of quasi-one-dimensional bismuth iodide Bi4I4. The electronic structure of β-Bi4I4, characterized by Z2 invariants (1;110), is in proximity of both the weak TI phase (0;001) and the trivial insulator phase (0;000). Our angle-resolved photoemission spectroscopy measurements performed on the (001) surface reveal a highly anisotropic band-crossing feature located at the M¯ point of the surface Brillouin zone and showing no dispersion with the photon energy, thus being fully consistent with the theoretical prediction.

Original languageEnglish
Pages (from-to)154-158
Number of pages5
JournalNature materials
Volume15
Issue number2
DOIs
Publication statusPublished - 2016 Feb 1

Fingerprint

Bismuth
iodides
bismuth
insulators
Antimony
Photoelectron spectroscopy
Electronic structure
Photons
predictions
antimony
Brillouin zones
proximity
photoelectric emission
electronic structure
photons
spectroscopy
bismuth iodide
energy

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Autès, G., Isaeva, A., Moreschini, L., Johannsen, J. C., Pisoni, A., Mori, R., ... Yazyev, O. V. (2016). A novel quasi-one-dimensional topological insulator in bismuth iodide β-Bi4I4 Nature materials, 15(2), 154-158. https://doi.org/10.1038/nmat4488
Autès, Gabriel ; Isaeva, Anna ; Moreschini, Luca ; Johannsen, Jens C. ; Pisoni, Andrea ; Mori, Ryo ; Zhang, Wentao ; Filatova, Taisia G. ; Kuznetsov, Alexey N. ; Forró, László ; Van Den Broek, Wouter ; Kim, Yeongkwan ; Kim, Keun Su ; Lanzara, Alessandra ; Denlinger, Jonathan D. ; Rotenberg, Eli ; Bostwick, Aaron ; Grioni, Marco ; Yazyev, Oleg V. / A novel quasi-one-dimensional topological insulator in bismuth iodide β-Bi4I4 In: Nature materials. 2016 ; Vol. 15, No. 2. pp. 154-158.
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Autès, G, Isaeva, A, Moreschini, L, Johannsen, JC, Pisoni, A, Mori, R, Zhang, W, Filatova, TG, Kuznetsov, AN, Forró, L, Van Den Broek, W, Kim, Y, Kim, KS, Lanzara, A, Denlinger, JD, Rotenberg, E, Bostwick, A, Grioni, M & Yazyev, OV 2016, 'A novel quasi-one-dimensional topological insulator in bismuth iodide β-Bi4I4 ', Nature materials, vol. 15, no. 2, pp. 154-158. https://doi.org/10.1038/nmat4488

A novel quasi-one-dimensional topological insulator in bismuth iodide β-Bi4I4 . / Autès, Gabriel; Isaeva, Anna; Moreschini, Luca; Johannsen, Jens C.; Pisoni, Andrea; Mori, Ryo; Zhang, Wentao; Filatova, Taisia G.; Kuznetsov, Alexey N.; Forró, László; Van Den Broek, Wouter; Kim, Yeongkwan; Kim, Keun Su; Lanzara, Alessandra; Denlinger, Jonathan D.; Rotenberg, Eli; Bostwick, Aaron; Grioni, Marco; Yazyev, Oleg V.

In: Nature materials, Vol. 15, No. 2, 01.02.2016, p. 154-158.

Research output: Contribution to journalArticle

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T1 - A novel quasi-one-dimensional topological insulator in bismuth iodide β-Bi4I4

AU - Autès, Gabriel

AU - Isaeva, Anna

AU - Moreschini, Luca

AU - Johannsen, Jens C.

AU - Pisoni, Andrea

AU - Mori, Ryo

AU - Zhang, Wentao

AU - Filatova, Taisia G.

AU - Kuznetsov, Alexey N.

AU - Forró, László

AU - Van Den Broek, Wouter

AU - Kim, Yeongkwan

AU - Kim, Keun Su

AU - Lanzara, Alessandra

AU - Denlinger, Jonathan D.

AU - Rotenberg, Eli

AU - Bostwick, Aaron

AU - Grioni, Marco

AU - Yazyev, Oleg V.

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Autès G, Isaeva A, Moreschini L, Johannsen JC, Pisoni A, Mori R et al. A novel quasi-one-dimensional topological insulator in bismuth iodide β-Bi4I4 Nature materials. 2016 Feb 1;15(2):154-158. https://doi.org/10.1038/nmat4488