Published October 20, 2021 | Version v1
Journal article Open

Ultrathin epitaxial Bi film growth on 2D HfTe2 template


Among ultrathin monoelemental two-dimensional (2D) materials, bismuthene, the single layer of heavier group-VΑ element bismuth (Bi), has been predicted to have large non trivial gap. Here, we demonstrate the growth of Bi films by molecular beam epitaxy on 2D-HfTe2 template. At the initial stage of Bi deposition (1–2 bilayers, BL), both the pseudocubic Bi(110) and the hexagonal Bi(111) phases are formed. When reaching 3 BL Bi, a transformation to pure hexagonal Bi(111) occurs. The electronic band structure of 3 BL Bi(111) films was measured by angle-resolved photoemission spectroscopy showing very good matching with the density functional theory band structure calculations of 3 BL free standing Bi(111). The grown Bi(111) thin film was capped with a protective Al2O3 layer and its stability under ambient conditions, necessary for practical applications and device fabrication, was confirmed by x-ray photoelectron spectroscopy and Raman spectroscopy.



Files (641.0 kB)

Name Size Download all
641.0 kB Preview Download

Additional details

Related works

Is published in
Journal article: 10.1088/1361-6528/ac2d08 (DOI)


SKYTOP – Skyrmion-Topological insulator and Weyl semimetal technology 824123
European Commission