<div class="csl-bib-body">
<div class="csl-entry">Witt, N., Si, L., Tomczak, J. M., Held, K., & Wehling, T. O. (2023). No superconductivity in Pb₉ Cu₁ (PO₄)₆O found in orbital and spin fluctuation exchange calculations. <i>SciPost Physics</i>, <i>15</i>(5), Article 197. https://doi.org/10.21468/SciPostPhys.15.5.197</div>
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dc.identifier.issn
2542-4653
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/191120
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dc.description.abstract
Finding a material that turns superconducting under ambient conditions has been the goal of over a century of research, and recently Pb10−xCux(PO4)6O aka LK-99 has been put forward as a possible contestant. In this work, we study the possibility of electronically driven superconductivity in LK-99 also allowing for electron or hole doping. We use an ab initio derived two-band model of the Cu eg orbitals for which we determine interaction values from the constrained random phase approximation (cRPA). For this two-band model we perform calculations in the fluctuation exchange (FLEX) approach to assess the strength of orbital and spin fluctuations. We scan over a broad range of parameters and enforce no magnetic or orbital symmetry breaking. Even under optimized conditions for superconductivity, spin and orbital fluctuations turn out to be too weak for superconductivity anywhere near to room-temperature. We contrast this finding to non-self-consistent RPA, where it is possible to induce spin singlet d-wave superconductivity at Tc ≥300K if the system is put close enough to a magnetic instability.
en
dc.description.sponsorship
FWF - Österr. Wissenschaftsfonds
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dc.description.sponsorship
FWF - Österr. Wissenschaftsfonds
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dc.description.sponsorship
FWF - Österr. Wissenschaftsfonds
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dc.language.iso
en
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dc.publisher
SCIPOST FOUNDATION
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dc.relation.ispartof
SciPost Physics
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dc.subject
superconductivity
en
dc.title
No superconductivity in Pb₉ Cu₁ (PO₄)₆O found in orbital and spin fluctuation exchange calculations
en
dc.type
Article
en
dc.type
Artikel
de
dc.contributor.affiliation
Universität Hamburg
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dc.contributor.affiliation
Universität Hamburg
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dc.relation.grantno
F 86
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dc.relation.grantno
I 5398-N
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dc.relation.grantno
P 36213-N
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dc.type.category
Original Research Article
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tuw.container.volume
15
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tuw.container.issue
5
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tuw.journal.peerreviewed
true
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tuw.peerreviewed
true
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wb.publication.intCoWork
International Co-publication
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tuw.project.title
Zentrum für korrelierte Quantenmaterialien und festkörperbasierte Quantensysteme
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tuw.project.title
Elektronische Struktur und Supraleitung in Nickelaten