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Title(s)
Title | Language |
Observation of Two Cascading Screening Processes in an Iron-based Superconductor | en |
Author(s)
Name | ORCID | GND | Affiliation |
Chang, Ming-Hua | |||
Backes, Steffen | |||
Lu, Donghui | |||
Gauthier, Nicolas | |||
Hashimoto, Makoto | |||
Chen, Guan-Yu | |||
Wen, Hai-Hu | |||
Mo, Sung-Kwan | |||
Shen, Zhi-Xun | |||
Valentí, Roser | |||
Pfau, Heike |
Faculty
13 Physics
Date Issued
22 July 2025
Publisher(s)
Goethe-Universität Frankfurt
Type(s) of data
Dataset
Language(s)
en
Abstract(s)
Abstract | Language |
Understanding how renormalized quasiparticles emerge in strongly correlated electron materials provides a challenge for both experiment and theory. It has been predicted that distinctive spin and orbital screening mechanisms drive this process in multiorbital materials with strong Coulomb and Hund’s interactions. Here, we provide the experimental evidence of both mechanisms from angle-resolved photoemission spectroscopy on RbFe2As2. We observe that the emergence of low-energy Fe 3dxy quasiparticles below 90K coincides with spin screening. A second process changes the spectral weight at high energies up to room temperature. Supported by theoretical calculations we attribute it to orbital screening of Fe 3d atomic excitations. These two cascading screening processes drive the temperature evolution from a bad metal to a correlated Fermi liquid. | en |
Description(s)
Description | Language |
Data sets for the figures in the main text of the paper(Commun.Mater. 6, 157 (2025)) | en |
License
All rights reserved
Views
5
Acquisition Date
Oct 21, 2025
Oct 21, 2025
Downloads
1
Acquisition Date
Oct 21, 2025
Oct 21, 2025