@Article{FornariBMPRTZKLMKVIRHRA:2020:InEuBi,
author = "Fornari, Celso Israel and Bentmann, Hendrik and Morelh{\~a}o,
S{\'e}rgio L. and Peixoto, Thiago and Rappl, Paulo Henrique de
Oliveira and Tcakaev, Abdul and Zabolotnyy, Volodymyr and Kamp,
Martin and Lee, Tien-Lin and Min, Chul-Hee and Kagerer, Philipp
and Vidal, Raphael and Isaeva, Anna and Ruck, Michael and Hinkov,
Vladimir and Reinert, Friedrich and Abramof, Eduardo",
affiliation = "{Universit{\"a}t W{\"u}rzburg} and {Universit{\"a}t
W{\"u}rzburg} and {Universidade de S{\~a}o Paulo (USP)} and
{Universit{\"a}t W{\"u}rzburg} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universit{\"a}t W{\"u}rzburg}
and {Universit{\"a}t W{\"u}rzburg} and {Universit{\"a}t
W{\"u}rzburg} and {Harwell Science and Innovation Campus} and
{Universit{\"a}t W{\"u}rzburg} and {Universit{\"a}t
W{\"u}rzburg} and {Universit{\"a}t W{\"u}rzburg} and
{Technische Universit{\"a}t Dresden} and {Technische
Universit{\"a}t Dresden} and {Universit{\"a}t W{\"u}rzburg} and
{Universit{\"a}t W{\"u}rzburg} and {Instituto Nacional de
Pesquisas Espaciais (INPE)}",
title = "Incorporation of europium in Bi2Te3 topological insulator
epitaxial films",
journal = "Journal of Physical Chemistry C",
year = "2020",
volume = "124",
number = "29",
pages = "16048--16057",
month = "July",
abstract = "In the field of topological materials, the interaction between
band topology and magnetism remains a current frontier for the
advancement of new topological states and spintronic
functionalities. Doping with rare-earth elements with large
magnetic moments is a current approach to exploit the
phenomenology of such interaction. However, dopant solubility into
the main matrix plays a major role. In this sense, the present
work is focused on elucidating how Eu incorporates into Bi2Te3
lattice as a function of doping. This work reports a systematic
investigation of the structural and electronic properties of
bismuth telluride epitaxial layers doped with Eu. Bi2Te3 films
were grown by molecular beam epitaxy on (111) BaF2 substrates with
nominal Eu doping ranging from 0% up to 9%. X-ray diffraction
analysis and scanning transmission electron microscopy reveal that
Eu atoms enter substitutionally on Bi sites up to 4% of Eu doping.
In contrast, the 9% Eu-doped sample contains epitaxially oriented
nanoclusters of EuTe. X-ray photoelectron and absorption
spectroscopies show that Eu atoms enter the Bi2Te3 crystal matrix
in the divalent Eu2+ state for all Eu concentrations.
Angle-resolved photoemission experiments indicate that the
topological surface state is preserved in the presence of the
local magnetic moments introduced by the Eu impurities.",
doi = "10.1021/acs.jpcc.0c05077",
url = "http://dx.doi.org/10.1021/acs.jpcc.0c05077",
issn = "1932-7447",
language = "en",
urlaccessdate = "18 abr. 2024"
}