<div class="csl-bib-body">
<div class="csl-entry">Zocco, D. A. (2022, April 13). <i>Controlling electronic topology in a strongly correlated electron system</i> [Conference Presentation]. TopCor22: Topological Materials: From Weak to Strong Correlations, Dresden, Germany.</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/152363
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dc.description.abstract
A key ingredient to obtaining topological quantum devices is the ability to control
topological states without modifying the underlying properties of the material that
hosts them. It is well known that in heavy fermion metals physical properties can
be much more readily tuned than in simple metals. Such correlated materials may
also exhibit extreme signatures of nontrivial topology, as recently demonstrated for
the Weyl-Kondo semimetal Ce3Bi4Pd3 [1, 2, 3]. What has remained open, however,
is whether these topological states are essentially inert, or can also be influenced by
external control parameters. Here we show the latter to be the case: the material’s
Weyl signatures can be fully suppressed by a relatively modest magnetic field [4]. We
understand this behavior as a Zeeman-driven motion of Weyl nodes in momentum
space, up to the point where the nodes meet and annihilate in a topological quantum
phase transition. The topologically trivial but correlated background remains
largely unaffected across this transition. Only at larger fields a transition from a
correlated narrow-gap phase to a metallic heavy Fermi liquid phase is observed. Our
work lies at the scarcely explored intersection between gapless topology and strong
correlations, and accentuates the importance of materials innovation to obtain much
needed breakthroughs in topological quantum applications.
[1] S. Dzsaber et al., Phys.Rev. Lett. 118, 246601 (2017).
[2] H. -H. Lai et al., Proc. Natl.Acad. Sci. U.S.A. 115, 93 (2018).
[3] S. Dzsaber et al., Proc. Natl.Acad. Sci. U.S.A. 118, e2013386118 (2021).
[4] S. Dzsaber et al., arXiv:1906.01182 (2019).
en
dc.language.iso
en
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dc.subject
strongly correlated electron systems
en
dc.title
Controlling electronic topology in a strongly correlated electron system
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dc.type
Presentation
en
dc.type
Vortrag
de
dc.type.category
Conference Presentation
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tuw.publication.invited
invited
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tuw.researchTopic.id
M3
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tuw.researchTopic.id
Q6
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tuw.researchTopic.name
Metallic Materials
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tuw.researchTopic.name
Quantum Many-body Systems Physics
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tuw.researchTopic.value
50
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tuw.researchTopic.value
50
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tuw.publication.orgunit
E138-04 - Forschungsbereich Quantum Materials
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tuw.author.orcid
0000-0002-6958-0416
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tuw.event.name
TopCor22: Topological Materials: From Weak to Strong Correlations
en
dc.description.sponsorshipexternal
FWF
-
dc.description.sponsorshipexternal
FWF
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dc.description.sponsorshipexternal
FWF
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dc.description.sponsorshipexternal
European Microkelvin Platform
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dc.relation.grantnoexternal
I4047-N27
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dc.relation.grantnoexternal
P29279
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dc.relation.grantnoexternal
I5868-FOR 5249 - QUAST
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dc.relation.grantnoexternal
824109
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tuw.event.startdate
11-04-2022
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tuw.event.enddate
13-04-2022
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tuw.event.online
Hybrid
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tuw.event.type
Event for scientific audience
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tuw.event.place
Dresden
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tuw.event.country
DE
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tuw.event.institution
Max Planck Institute for the Physics of Complex Systems
