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@ARTICLE{Jeong:850952,
author = {Jeong, Sang-Min and Yi, Seho and Kim, Hyun-Jung and
Bihlmayer, Gustav and Cho, Jun-Hyung},
title = {{C}ompeting edge structures of {S}b and {B}i bilayers
generated by trivial and nontrivial band topologies},
journal = {Physical review / B},
volume = {98},
number = {7},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2018-04683},
pages = {075402},
year = {2018},
abstract = {One-dimensional (1D) edge states formed at the boundaries
of 2D normal and topological insulators have shown
intriguing quantum phases such as charge density wave and
quantum spin Hall effect. Based on first-principles
density-functional theory calculations including spin-orbit
coupling (SOC), we show that the edge states of zigzag
Sb(111) and Bi(111) nanoribbons drastically change the
stability of their edge structures. For zigzag Sb(111)
nanoribbon, the Peierls-distorted or reconstructed edge
structure is stabilized by a band-gap opening. However, for
zigzag Bi(111) nanoribbons, such insulating structures are
destabilized due to the presence of topologically protected
gapless edge states, resulting in the stabilization of a
metallic, shear-distorted edge structure. We also show that
the edge states of the Bi(111) nanoribbon exhibit a larger
Rashba-type spin splitting at the boundary of Brillouin zone
compared to those of the Sb(111) nanoribbon. Interestingly,
the spin textures of edge states in the Peierls-distorted Sb
edge structure and the shear-distorted Bi edge structure
have all three spin components perpendicular and parallel to
the edges due to their broken mirror-plane symmetry. The
present findings demonstrate that the topologically trivial
and nontrivial edge states play crucial roles in determining
the edge structures of normal and topological insulators.},
cin = {PGI-1 / IAS-1 / JARA-FIT / JARA-HPC},
ddc = {530},
cid = {I:(DE-Juel1)PGI-1-20110106 / I:(DE-Juel1)IAS-1-20090406 /
$I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$},
pnm = {142 - Controlling Spin-Based Phenomena (POF3-142)},
pid = {G:(DE-HGF)POF3-142},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000440716700005},
doi = {10.1103/PhysRevB.98.075402},
url = {https://juser.fz-juelich.de/record/850952},
}