Band dispersion within pristine InBi crystal

L Nicolaï (1) , J Minár (1) , M C Richter (2, 3, 4) , O Heckmann (2, 3, 4) , M Fanciulli (2, 3, 4) , L Nagi Reddy (2, 3, 4) , G Bell (5) , R Haria (5) , J.-M Mariot (6) , K Hricovini (2, 3, 4)

1 NTC - New Technologies Research Centre [Plzeň]
2 LPMS - Laboratoire de Physique des Matériaux et des Surfaces
3 LIDYL - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
4 DICO - Dynamique et Interactions en phase Condensée
5 University of Warwick [Coventry]
6 LCPMR - Laboratoire de Chimie Physique - Matière et Rayonnement

InBi has been theoretically analysed for many years as a semi-metal showing a stable phase within the PbO structure thanks to spin-orbit coupling forces . Regrettably, this alloy system remains not well-known on the experimental side: reports of grown ordered crystals are rare. We here present a thorough experimental and ab initio theoretical analysis on InBi(001). The crystal was grown using the Bridgman-Stockbarger technique. InBi consists of In layers sandwiched between Bi monolayers, with weak Van der Waals bonds amid the resulting trilayers. The InBi crystal was cleaved in situ in order to obtain a clean and flat surface suitable for angleresolved photoemission measurements. The SPR-KKR package , based on the Dirac equation, which fundamentally includes relativistic effects, was used for the theoretical analysis and clearly underlines the influence of the surface termination.

Domaines: Physique [physics]

L Nicolaï, J Minár, M C Richter, O Heckmann, M Fanciulli, et al.. Band dispersion within pristine InBi crystal. APCOM 2022 - 28th International Conference on Applied Physics of Condensed Matter, J. Vajda, I. Jamnický, and P. Novák, Jun 2022, Štrbské Pleso, Slovakia. ⟨hal-03944014⟩