Inversion Domain
Boundary Induced Stacking and Bandstructure
Diversity in Bilayer MoSe2
Version 2 2017-10-20, 18:48
Version 1 2017-10-18, 13:49
Posted on 2017-10-20 - 18:48
Interlayer
rotation and stacking were recently demonstrated as
effective strategies for tuning physical properties of various two-dimensional
materials. The latter strategy was mostly realized in heterostructures
with continuously varied stacking orders, which obscure the revelation
of the intrinsic role of a certain stacking order in its physical
properties. Here, we introduce inversion-domain-boundaries into molecular-beam-epitaxy
grown MoSe2 homobilayers, which induce uncommon fractional
lattice translations to their surrounding domains, accounting for
the observed diversity of large-area and uniform stacking sequences.
Low-symmetry stacking orders were observed using scanning transmission
electron microscopy and detailed geometries were identified by density
functional theory. A linear relation was also revealed between interlayer
distance and stacking energy. These stacking sequences yield various
energy alignments between the valence states at the Γ and K
points of the Brillouin zone, showing stacking-dependent bandgaps
and valence band tail states in the measured scanning tunneling spectroscopy.
These results may benefit the design of two-dimensional multilayers
with manipulable stacking orders.
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Hong, Jinhua; Wang, Cong; Liu, Hongjun; Ren, Xibiao; Chen, Jinglei; Wang, Guanyong; et al. (2017). Inversion Domain
Boundary Induced Stacking and Bandstructure
Diversity in Bilayer MoSe2. ACS Publications. Collection. https://doi.org/10.1021/acs.nanolett.7b02600
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AUTHORS (12)
JH
Jinhua Hong
CW
Cong Wang
HL
Hongjun Liu
XR
Xibiao Ren
JC
Jinglei Chen
GW
Guanyong Wang
JJ
Jinfeng Jia
MX
Maohai Xie
CJ
Chuanhong Jin
WJ
Wei Ji
JY
Jun Yuan
ZZ
Ze Zhang
KEYWORDS
Bilayer MoSe 2 Interlayer rotationInversion Domain Boundary Induced Stackingvalence statesvalence band tail statesBandstructure DiversitysequenceK pointsinterlayer distancelatter strategylattice translationsenergy alignmentsscanning transmission electron microscopyscanning tunneling spectroscopyBrillouin zoneMoSe 2 homobilayersstacking-dependent bandgaps