Three- to Two-Dimensional Transition of the Electronic Structure in CaFe2As2: A Parent Compound for an Iron Arsenic High-Temperature Superconductor
Chang Liu, Takeshi Kondo, Ni Ni, A. D. Palczewski, A. Bostwick, G. D. Samolyuk, R. Khasanov, M. Shi, E. Rotenberg, S. L. Bud’ko, P. C. Canfield, A. Kaminski
DOI 10.1103/PhysRevLett.102.167004 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We use angle-resolved photoemission spectroscopy (ARPES) to study the electronic properties of CaFe2As2—parent compound of a pnictide superconductor. We find that the structural and magnetic transition is accompanied by a three- to two-dimensional (3D-2D) crossover in the electronic structure. Above the transition temperature (Ts) Fermi surfaces around Γ and X points are cylindrical and quasi 2D. Below Ts, the Γ pocket forms a 3D ellipsoid, while the X pocket remains quasi 2D. This finding strongly suggests that low dimensionality plays an important role in understanding the superconducting mechanism in pnictides.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CaFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
High-energy electronic interaction in the 3d band of high-temperature iron-based superconductors
similarity 0.92D. V. Evtushinsky et al.
Source status unknown — claims are unverified
Three- to Two-Dimensional Transition of the Electronic Structure in CaFe2As2 - parent compound for an iron arsenic high temperature superconductor
similarity 0.92Chang Liu et al. · 2009 · arXiv:0903.4388
Source status unknown — claims are unverified
Quasiparticle interference in antiferromagnetic parent compounds of iron-based superconductors
similarity 0.91I. I. Mazin et al.
Source status unknown — claims are unverified
Unexpected Fermi-surface nesting in the pnictide parent compounds BaFe2As2 and CaFe2As2 revealed by angle-resolved photoemission spectroscopy
similarity 0.91Takeshi Kondo et al.
Source status unknown — claims are unverified
Anisotropic superconducting properties of optimally doped BaFe2(As0.65P0.35)2 under pressure
similarity 0.91Swee K. Goh et al.
Source status unknown — claims are unverified
Existence, Character, and Origin of Surface-Related Bands in the High Temperature Iron Pnictide Superconductor BaFe2−xCoxAs2
similarity 0.91Erik van Heumen et al.
Source status unknown — claims are unverified