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Symmetry-decomposed elastoresistance of AFe2As2 (A = K, Rb, Cs)

Wiecki, Paul

Abstract (englisch):
We present elastoresistance measurements of the iron-based superconductors AFe2As2 (A = K, Rb, Cs) in the A1g, B1g and B2g symmetry channels. These materials have strong electronic correlations and show a crossover between a low-temperature coherent heavy Fermi liquid and a high-temperature regime of reduced quasiparticle coherence [1,2]. Neutralizing the large thermal expansion of these materials by means of a piezoelectric strain cell is found to be essential to obtaining intrinsic results. All three materials have a significant in-plane symmetric A1g response, consistent with the coherence-incoherence crossover.



Zugehörige Institution(en) am KIT Institut für Quantenmaterialien und -technologien (IQMT)
Publikationstyp Vortrag
Publikationsdatum 16.03.2021
Sprache Englisch
Identifikator KITopen-ID: 1000131793
HGF-Programm 43.21.01 (POF IV, LK 01) Quantum Correlations in Condensed Matter
Veranstaltung APS March Meeting (2021), Online, 15.03.2021 – 19.03.2021
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