<div class="csl-bib-body">
<div class="csl-entry">Shuvaev, A., Pan, L., Tai, L., Zhang, P., Wang, K. L., & Pimenov, A. (2022). Universal rotation gauge via quantum anomalous Hall effect. <i>Applied Physics Letters</i>, <i>121</i>(19), Article 193101. https://doi.org/10.1063/5.0105159</div>
</div>
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dc.identifier.issn
0003-6951
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/142063
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dc.description.abstract
Integer quantum Hall effect allows to gauge the resistance standard up to more than one part in a billion. Combining it with the speed of light, one obtains the fine-structure constant α ≈ 1/137, a dimensionless reference number that can be extracted from a physical experiment. Most exact notion of this value and especially its possible variation on the cosmological time scales is of enormous relevance for fundamental science. In an optical experiment, the fine-structure constant can be directly obtained as purely geometrical angle by measuring the quantized rotation of light polarization in two-dimensional quantum wells. In realistic conditions, high external magnetic fields have to be applied, which strongly affects possible attainable accuracy. An elegant solution of this problem is provided by quantum anomalous Hall effect where a universal quantized value can be obtained in zero magnetic field. Here, we measure the fine-structure constant in a direct optical experiment that requires no material adjustments or technical calibrations. By investigating the Faraday rotation at the interference maxima of the dielectric substrate, the angle close to one a is obtained at liquid helium temperatures without using a dilution refrigerator. Such calibration and parameter-free experiment provides a system-of-unit-independent access to universal quantum of rotation.
en
dc.language.iso
en
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dc.publisher
AIP PUBLISHING
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dc.relation.ispartof
Applied Physics Letters
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dc.subject
topology
en
dc.subject
rotation gauge
en
dc.subject
quantum Hall effect
en
dc.title
Universal rotation gauge via quantum anomalous Hall effect
en
dc.type
Article
en
dc.type
Artikel
de
dc.type.category
Original Research Article
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tuw.container.volume
121
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tuw.container.issue
19
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tuw.journal.peerreviewed
true
-
tuw.peerreviewed
true
-
wb.publication.intCoWork
International Co-publication
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tuw.researchTopic.id
M2
-
tuw.researchTopic.id
Q4
-
tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.name
Nanoelectronics
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tuw.researchTopic.value
50
-
tuw.researchTopic.value
50
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dcterms.isPartOf.title
Applied Physics Letters
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tuw.publication.orgunit
E138-05 - Forschungsbereich Solid State Spectroscopy
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tuw.publisher.doi
10.1063/5.0105159
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dc.identifier.articleid
193101
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dc.identifier.eissn
1077-3118
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dc.description.numberOfPages
5
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tuw.author.orcid
0000-0002-7059-3740
-
tuw.author.orcid
0000-0001-6911-7117
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dc.description.sponsorshipexternal
FWF
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wb.sci
true
-
wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch.oefos
1030
-
wb.sciencebranch.value
100
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item.openairetype
Article
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item.openairetype
Artikel
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none
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item.cerifentitytype
Publications
-
item.cerifentitytype
Publications
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item.languageiso639-1
en
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item.openairecristype
http://purl.org/coar/resource_type/c_18cf
-
item.openairecristype
http://purl.org/coar/resource_type/c_18cf
-
item.fulltext
no Fulltext
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crisitem.author.dept
E138-05 - Forschungsbereich Solid State Spectroscopy
-
crisitem.author.dept
E138-05 - Forschungsbereich Solid State Spectroscopy