2020/11/10 by K. Mydeen, Anton Jesche, A. Jesche +8 · 5 citations
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Arsenide #Condensed matter physics #Corporate Taxation and Avoidance #Doping #Electrical resistivity and conductivity #Electron #Gallium arsenide #Hydrostatic pressure #Iron-based superconductors research #Kondo effect #Magnetic moment #Magnetism #Materials science #Nuclear physics #Physics #Pnictogen #Rare-earth and actinide compounds #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.125.207001
published in Physical Review Letters 125(20), 207001 (American Physical Society) · 6 pages, 3 figures + supplemental material
openalex publication_date 2020/11/10 · arxiv created 2020/11/11 · arxiv updated 2020/11/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In the iron-pnictide material CeFeAsO not only the Fe moments, but also the local 4f moments of the Ce order antiferromagnetically at low temperatures. We elucidate on the peculiar role of the Ce on the emergence of superconductivity. While application of pressure suppresses the iron SDW ordering temperature monotonously up to 4 GPa, the Ce-4f magnetism is stabilized until both types of magnetic orders disappear abruptly and a narrow SC dome develops. With further increasing pressure characteristics of a Kondo-lattice system become more and more apparent in the electrical resistivity. This suggests a connection of the emergence of superconductivity with the extinction of the magnetic order and the onset of Kondo screening of the Ce-4f moments.