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@ARTICLE{Rmann:843817,
author = {Rüßmann, P. and Weber, A. P. and Glott, F. and Xu, N. and
Fanciulli, M. and Muff, S. and Magrez, A. and Bugnon, P. and
Berger, H. and Bode, M. and Dil, J. H. and Blügel, S. and
Mavropoulos, P. and Sessi, P.},
title = {{U}niversal scattering response across the type-{II} {W}eyl
semimetal phase diagram},
journal = {Physical review / B},
volume = {97},
number = {7},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2018-01357},
pages = {075106},
year = {2018},
abstract = {The discovery of Weyl semimetals represents a significant
advance in topological band theory. They paradigmatically
enlarged the classification of topological materials to
gapless systems while simultaneously providing experimental
evidence for the long-sought Weyl fermions. Beyond
fundamental relevance, their high mobility, strong
magnetoresistance, and the possible existence of even more
exotic effects, such as the chiral anomaly, make Weyl
semimetals a promising platform to develop radically new
technology. Fully exploiting their potential requires going
beyond the mere identification of materials and calls for a
detailed characterization of their functional response,
which is severely complicated by the coexistence of surface-
and bulk-derived topologically protected quasiparticles,
i.e., Fermi arcs and Weyl points, respectively. Here, we
focus on the type-II Weyl semimetal class in which we find a
stoichiometry-dependent phase transition from a trivial to a
nontrivial regime. By exploring the two extreme cases of the
phase diagram, we demonstrate the existence of a universal
response of both surface and bulk states to perturbations.
We show that quasiparticle interference patterns originate
from scattering events among surface arcs. Analysis reveals
that topologically nontrivial contributions are strongly
suppressed by spin texture. We also show that scattering at
localized impurities can generate defect-induced
quasiparticles sitting close to the Weyl point energy. These
give rise to strong peaks in the local density of states,
which lift the Weyl node, significantly altering the
pristine low-energy spectrum. Remarkably, by comparing the
WTe2 and the MoTe2 cases we found that scattering response
and topological transition are not directly linked.
Visualizing the existence of a universal microscopic
response to scattering has important consequences for
understanding the unusual transport properties of this class
of materials. Overall, our observations provide a unifying
picture of the type-II Weyl phase diagram.},
cin = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC},
ddc = {530},
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) / 143 -
Controlling Configuration-Based Phenomena (POF3-143) /
Scattering of topologically protected states off defects in
topological insulators $(jara0078_20131101)$},
pid = {G:(DE-HGF)POF3-142 / G:(DE-HGF)POF3-143 /
$G:(DE-Juel1)jara0078_20131101$},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000424088600001},
doi = {10.1103/PhysRevB.97.075106},
url = {https://juser.fz-juelich.de/record/843817},
}