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  5. Faculty of Physics: Research Data
  6. Observation of Two Cascading Screening Processes in an Iron-based Superconductor
 
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Title(s)
TitleLanguage
Observation of Two Cascading Screening Processes in an Iron-based Superconductor
en
 
Author(s)
NameORCIDGNDAffiliation
Chang, Ming-Hua
Pennsylvania State University 
Backes, Steffen
0000-0002-7761-7098
RIKEN, Wako, Japan 
Lu, Donghui
0000-0002-9708-0443
SLAC National Accelerator Laboratory, Menlo Park, CA 
Gauthier, Nicolas
0000-0001-6147-243X
Institut National de la Recherche Scientifique, Quebec 
Hashimoto, Makoto
SLAC National Accelerator Laboratory, Menlo Park, CA 
Chen, Guan-Yu
Nanjing University 
Wen, Hai-Hu
0000-0003-0093-1625
Nanjing University 
Mo, Sung-Kwan
0000-0003-0711-8514
Lawrence Berkeley National Laboratory 
Shen, Zhi-Xun
SLAC National Accelerator Laboratory, Menlo Park, CA 
Valentí, Roser
0000-0003-0497-1165
Theoretical Physics 
Pfau, Heike
Pennsylvania State University 
 
Faculty
13 Physics
 
Date Issued
22 July 2025
 
Publisher(s)
Goethe-Universität Frankfurt
 
Handle
https://gude.uni-frankfurt.de/handle/gude/681
 
DOI
10.1038/s43246-025-00881-5
 

Type(s) of data
Dataset
 
Language(s)
en
 
Abstract(s)
AbstractLanguage
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)
DescriptionLanguage
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
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Downloads
1
Acquisition Date
Oct 21, 2025
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