Drastic electronic structure reconstruction of CaPrFeAs in the collapsed tetragonal phase
arXiv:1410.6123 · doi:10.1103/PhysRevB.90.214519
Abstract
We report the electronic structure reconstruction of CaPrFeAs ( = 0.1 and 0.15) in the low temperature collapsed tetragonal (CT) phase observed by angle-resolved photoemission spectroscopy. Different from Ca(FeRh)As and the annealed CaFeAs where all hole Fermi surfaces are absent in their CT phases, the cylindrical hole Fermi surface can still be observed in the CT phase of CaPrFeAs. Furthermore, we found at least three well separated electron-like bands around the zone corner in the CT phase of CaPrFeAs, which are more dispersive than the electron-like 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.
8 pages, 7 figures
References in corpus (22)
- Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
- Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
- Superconductivity at 43 K in Samarium-arsenide Oxides
- Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
- Superconductivity up to 37 K in (A1-xSrx)Fe2As2 with A=K and Cs
- Pressure induced superconductivity in CaFeAs
- Pressure-induced volume-collapsed tetragonal phase of CaFe2As2 as seen via neutron scattering
- The Unprecedented Giant Coupling of Fe-spin State and the As-As Hybridization in Iron-Pnictide
- Superconducting and ferromagnetic phases induced by lattice distortions in SrFe2As2
- Three- to Two-Dimensional Transition of the Electronic Structure in CaFe2As2 - parent compound for an iron arsenic high temperature superconductor
- Extraordinary quasiparticle scattering and bandwidth-control by dopants in iron-based superconductors
- Topological change of the Fermi surface in ternary iron-pnictides with reduced c/a ratio: A dHvA study of CaFe2P2
- Spin-state transition in the Fe-pnictides
- Suppression of antiferromagnetic spin fluctuations in the collapsed tetragonal phase of CaFe2As2
- Microscopic origin of pressure-induced phase transitions in iron-pnictide superconductors: an {ab initio} molecular-dynamics study
- Existence, character and origin of surface-related bands in the high temperature iron pnictide superconductor BaFe_{2-x}Co_{x}As_{2}
- Correlation effects in the tetragonal and collapsed tetragonal phase of CaFe2As2
- Fermi-Surface Reconstruction and Complex Phase Equilibria in CaFeAs
- Pressure Suppression of Electron Correlation in the Collapsed Tetragonal Phase of : A DFT-DMFT Investigation
- Pressure- and temperature-induced structural phase transitions of CaFeAs and BaFeAs studied in the Hund's rule correlation picture
- Experimental investigation of the electronic structure of CaLaFeAs
- Quenched Fe Moment in the Collapsed Tetragonal Phase of CaPrFeAs