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Paramagnons and high-temperature superconductivity in a model family of cuprates.

Authors :
Wang L
He G
Yang Z
Garcia-Fernandez M
Nag A
Zhou K
Minola M
Tacon ML
Keimer B
Peng Y
Li Y
Source :
Nature communications [Nat Commun] 2022 Jun 07; Vol. 13 (1), pp. 3163. Date of Electronic Publication: 2022 Jun 07.
Publication Year :
2022

Abstract

Cuprate superconductors have the highest critical temperatures (T <subscript>c</subscript> ) at ambient pressure, yet a consensus on the superconducting mechanism remains to be established. Finding an empirical parameter that limits the highest reachable T <subscript>c</subscript> can provide crucial insight into this outstanding problem. Here, in the first two Ruddlesden-Popper members of the model Hg-family of cuprates, which are chemically nearly identical and have the highest T <subscript>c</subscript> among all cuprate families, we use inelastic photon scattering to reveal that the energy of magnetic fluctuations may play such a role. In particular, we observe the single-paramagnon spectra to be nearly identical between the two compounds, apart from an energy scale difference of ~30% which matches their difference in T <subscript>c</subscript> . The empirical correlation between paramagnon energy and maximal T <subscript>c</subscript> is further found to extend to other cuprate families with relatively high T <subscript>c</subscript> 's, hinting at a fundamental connection between them.<br /> (© 2022. The Author(s).)

Details

Language :
English
ISSN :
2041-1723
Volume :
13
Issue :
1
Database :
MEDLINE
Journal :
Nature communications
Publication Type :
Academic Journal
Accession number :
35672416
Full Text :
https://doi.org/10.1038/s41467-022-30918-z