Pregled bibliografske jedinice broj: 1271153
Local inversion-symmetry breaking in a bismuthate high-Tc superconductor
Local inversion-symmetry breaking in a bismuthate high-Tc superconductor // Nature Communications, 14 (2023), 1; 845, 9 doi:10.1038/s41467-023-36348-9 (međunarodna recenzija, članak, znanstveni)
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Naslov
Local inversion-symmetry breaking in a bismuthate
high-Tc superconductor
Autori
Griffitt, S. ; Spaić, M. ; Joe, J. ; Anderson, Z. W. ; Zhai, D. ; Krogstad, M. J. ; Osborn, R. ; Pelc, D. ; Greven, M.
Izvornik
Nature Communications (2041-1723) 14
(2023), 1;
845, 9
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
oxides, superconductors, inhomogeneity, diffuse scattering
Sažetak
The doped perovskite BaBiO3 exhibits a maximum superconducting transition temperature (Tc) of 34 K and was the first high-Tc oxide to be discovered, yet pivotal questions regarding the nature of both the metallic and superconducting states remain unresolved. Although it is generally thought that superconductivity in the bismuthates is of the conventional s-wave type, the pairing mechanism is still debated, with strong electron- phonon coupling and bismuth valence or bond disproportionation possibly playing a role. Here we use diffuse x-ray scattering and Monte Carlo modeling to study the local structure of Ba1- xKxBiO3 across its insulator-metal boundary. We find no evidence for either long- or short-range disproportionation, which resolves a major conundrum, as disproportionation and the related polaronic effects are likely not relevant for the metallic and superconducting states. Instead, we uncover nanoscale structural correlations that break inversion symmetry, with far-reaching implications for the electronic physics. This unexpected finding furthermore establishes that the bismuthates belong to the broader classes of materials with hidden spin-orbit coupling and a tendency towards inversion-breaking displacements.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
HRZZ-UIP-2020-02-9494 - Kolektivna pobuđenja i lokalna struktura u nekonvencionalnim supravodičima (CELUS) (Pelc, Damjan, HRZZ - 2020-02) ( CroRIS)
Ustanove:
Prirodoslovno-matematički fakultet, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
- MEDLINE
- Nature Index