Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 80, Issue 10, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.80.103701
Keywords
Iron-based superconductors; Lattice collapse transition; Fermi-liquid transport
Categories
Funding
- Japan Society for the Promotion of Science
- Ministry of Education, Culture, Sports, Science and Technology, Japan
- Grants-in-Aid for Scientific Research [23740274] Funding Source: KAKEN
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Ca(Fe1-xRhx)(2)As-2 undergoes successive phase transitions with increasing Rh doping in the T = 0 limit. The antiferromagnetic-metal phase with orthorhombic structure at 0.00 <= x <= 0.020 is driven to a superconducting phase with uncollapsed-tetragonal (ucT) structure at 0.020 <= x <= 0.024; a non-superconducting collapsed-tetragonal (cT) phase takes over at x >= 0.024. The breakdown of Fermi-liquid transport is observed in the ucT phase above T-c. In the adjacent cT phase, Fermi-liquid transport is restored along with a disappearance of superconductivity. This interplay of superconductivity and Fermi-liquid transport suggests the essential role of magnetic fluctuations in the emergence of superconductivity in doped CaFe2As2.
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