<div class="csl-bib-body">
<div class="csl-entry">Pustogow, A. (2025, September 10). <i>Topological Flat Bands for Thermoelectricity</i> [Conference Presentation]. Flatiron Workshop on Flat Bands: Frustration and Correlation Physics, New York, United States of America (the). http://hdl.handle.net/20.500.12708/225267</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/225267
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dc.description.abstract
Materials where flattened electronic dispersions arise from destructive phase interference, rather than
localized orbitals, have emerged as promising platforms for studying emergent quantum phenomena.
Crucial next steps involve tuning such flat bands to the Fermi level, where they can be studied at low energy
scales, and assessing their potential for practical applications. Here, we show that the interplay of highly
dispersive and ultraflat bands inherent to these systems can lead to extreme interband scattering-induced
electron-hole asymmetry, which can be harnessed in thermoelectrics. Our comprehensive theoretical and
experimental investigation of Ni3In1−xSnx kagome metals supports this concept, showing that it could lead
to thermoelectric performance on par with state-of-the-art semiconductors such as Bi2Te3. In Ni3
In,
scattering-induced electron-hole asymmetry is, however, subdued by an exotic conduction mechanism
arising from quantum tunneling of charge carriers between Dirac bands, unrelated to the flat band itself.We
outline strategies to selectively switch off this tunneling transport through negative chemical pressure or
strain. Our study proposes a new direction to explore in topological flat-band systems and vice versa
introduces a novel tuning knob for thermoelectric materials.
References:
PHYSICAL REVIEW X 15, 021054 (2025)
en
dc.language.iso
en
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dc.subject
metallic thermoelectrics
en
dc.subject
geometrical frustration
en
dc.subject
kagome lattices
en
dc.subject
Thermoelectricity
en
dc.subject
intermetallics
en
dc.subject
interband scattering
en
dc.title
Topological Flat Bands for Thermoelectricity
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.type.category
Conference Presentation
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tuw.publication.invited
invited
-
tuw.researchTopic.id
M2
-
tuw.researchTopic.id
E3
-
tuw.researchTopic.id
C1
-
tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.name
Climate Neutral, Renewable and Conventional Energy Supply Systems
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tuw.researchTopic.name
Computational Materials Science
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tuw.researchTopic.value
50
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tuw.researchTopic.value
10
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tuw.researchTopic.value
40
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tuw.publication.orgunit
E138-03 - Forschungsbereich Functional and Magnetic Materials
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tuw.author.orcid
0000-0001-9428-5083
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tuw.event.name
Flatiron Workshop on Flat Bands: Frustration and Correlation Physics
en
tuw.event.startdate
10-09-2025
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tuw.event.enddate
12-09-2025
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tuw.event.online
On Site
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tuw.event.type
Event for scientific audience
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tuw.event.place
New York
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tuw.event.country
US
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tuw.event.institution
Flatiron Institute
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tuw.event.presenter
Pustogow, Andrej
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tuw.event.track
Single Track
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch.oefos
1030
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wb.sciencebranch.value
100
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item.openairetype
conference paper not in proceedings
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item.openairecristype
http://purl.org/coar/resource_type/c_18cp
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item.cerifentitytype
Publications
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item.languageiso639-1
en
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item.grantfulltext
none
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item.fulltext
no Fulltext
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crisitem.author.dept
E138-03 - Forschungsbereich Functional and Magnetic Materials
