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@ARTICLE{Li:834562,
author = {Li, Xinru and Dai, Ying and Niu, Chengwang and Ma, Yandong
and Wei, Wei and Huang, Baibiao},
title = {{M}o{T}e2 is a good match for {G}e{I} by preserving quantum
spin {H}all phase},
journal = {Nano research},
volume = {10},
number = {8},
issn = {1998-0000},
address = {[S.l.]},
publisher = {Tsinghua Press},
reportid = {FZJ-2017-04490},
pages = {2823 - 2832},
year = {2017},
abstract = {Quantum spin Hall (QSH) insulator is a new class of
materials that is quickly becoming mainstream in
condensed-matter physics. The main obstacle for the
development of QSH insulators is that their strong
interactions with substrates make them difficult to study
experimentally. In this study, using density functional
theory, we discovered that MoTe2 is a good match for a GeI
monolayer. The thermal stability of a van der Waals
GeI/MoTe2 heterosheet was examined via molecular-dynamics
simulations. Simulated scanning tunneling microscopy
revealed that the GeI monolayer perfectly preserves the
bulked honeycomb structure of MoTe2. The GeI on MoTe2 was
confirmed to maintain its topological band structure with a
sizable indirect bulk bandgap of 0.24 eV by directly
calculating the spin Chern number to be −1. As expected,
the electron mobility of the GeI is enhanced by MoTe2
substrate restriction. According to deformation-potential
theory with the effective-mass approximation, the electron
mobility of GeI/MoTe2 was estimated as 372.7
cm2·s−1·V−1 at 300 K, which is 20 times higher than
that of freestanding GeI. Our research shows that
traditional substrates always destroy the topological states
and hinder the electron transport in QSH insulators, and
pave way for the further realization and utilization of QSH
insulators at room temperature.},
cin = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC},
ddc = {540},
cid = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
$I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
pnm = {142 - Controlling Spin-Based Phenomena (POF3-142)},
pid = {G:(DE-HGF)POF3-142},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000404560100024},
doi = {10.1007/s12274-017-1488-4},
url = {https://juser.fz-juelich.de/record/834562},
}