Bi ultra-thin crystalline films on InAs(111)A and B substrates: a combined core-level and valence-band angle-resolved and dichroic photoemission study
Artikel i vetenskaplig tidskrift, 2019
The growth of Bi on both the In-terminated (A) face and the As-terminated (B) face of InAs(111) has been investigated by low-energy electron diffraction, scanning tunnelling microscopy, and photoelectron spectroscopy using synchrotron radiation. The changes upon Bi deposition of the In 4d and Bi 5d(5/2) photoelectron signals allow to get a comprehensive picture of the Bi/InAs(111) interface. From the early stage the Bi growth on the A face is epitaxial, contrary to that on the B face that proceeds via the formation of islands. Angle-resolved photoelectron spectra show that the electronic structure of a Bi deposit of approximate to 10 bi-layers on the A face is identical to that of bulk Bi, while more than approximate to 30 bi-layers are needed for the B face. Both bulk and surface electronic states observed are well accounted for by fully relativistic ab initio calculations performed using the one-step model of photoemission. These calculations are used to analyse the dichroic photoemission data recorded in the vicinity of the Fermi level around the (Gamma) over bar point of the Brillouin zone.
ultra-thin films
indium arsenide
angle-resolved photoemission
circular dichroism
bismuth
growth
electronic structure calculations
Författare
L. Nicolai
University of West Bohemia
J-M Mariot
Sorbonne Université
SOLEIL Synchrotron
U. Djukic
Université de Cergy-Pontoise
W. Wang
Lunds universitet
O. Heckmann
Université de Cergy-Pontoise
Université Paris-Saclay
M. C. Richter
Université de Cergy-Pontoise
Université Paris-Saclay
Janusz Kanski
Chalmers, Fysik
M. Leandersson
Lunds universitet
T. Balasubramanian
Lunds universitet
J. Sadowski
Linnéuniversitetet
Polish Academy of Sciences
Uniwersytet Warszawski
J. Braun
Ludwig-Maximilians-Universität München (LMU)
H. Ebert
Ludwig-Maximilians-Universität München (LMU)
I. Vobornik
Consiglio Nazionale delle Ricerche (CNR)
J. Fujii
Consiglio Nazionale delle Ricerche (CNR)
J. Minar
University of West Bohemia
K. Hricovini
Université de Cergy-Pontoise
Université Paris-Saclay
New Journal of Physics
1367-2630 (ISSN)
Vol. 21 12 123012Ämneskategorier
Atom- och molekylfysik och optik
Materialkemi
Den kondenserade materiens fysik
DOI
10.1088/1367-2630/ab5c14