2014/10/24 by D. F. Xu, Dan Xu, Dawei Shen +14 · 1 citation
Business, Management and Accounting · Chemistry · Materials Science · Physics and Astronomy · #Angle-resolved photoemission spectroscopy #Chemistry #Condensed matter physics #Corporate Taxation and Avoidance #Crystallography #Electron #Electronic structure #Fermi level #Fermi surface #Iron-based superconductors research #Materials science #Nuclear magnetic resonance #Phase (matter) #Photoemission spectroscopy #Physics #Quantum mechanics #Superconductivity #Tetragonal crystal system #X-ray photoelectron spectroscopy #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.90.214519
published as Phys. Rev. B 90, 214519 (2014) · 8 pages, 7 figures
arxiv created 2014/10/24 · openalex publication_date 2014/12/22 · arxiv updated 2014/12/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report the electronic structure reconstruction of Ca_1\ensuremath-xPrxFe2As2 in the low temperature collapsed tetragonal (CT) phase observed by angle-resolved photoemission spectroscopy. Different from Ca(Fe_1\ensuremath-xRhx)2As2 and the annealed CaFe2As2 where all hole Fermi surfaces are absent in their CT phases, the cylindrical hole Fermi surface still persists in the CT phase of Ca_1\ensuremath-xPrxFe2As2. Furthermore, we found at least three well separated electronlike bands around the zone corner in the CT phase of Ca_1\ensuremath-xPrxFe2As2, which are more dispersive than the electronlike bands in the high temperature tetragonal phase. Based on these observations, we propose that the weakening of correlations (as indicated by the reduced effective mass), rather than the lack of Fermi surface nesting, might be responsible for the absence of magnetic ordering and superconductivity in the CT phase.