Electronic structure of the BaFe2As2 family of iron-pnictide superconductors
M. Yi, D. H. Lu, J. G. Analytis, J.-H. Chu, S.-K. Mo, R.-H. He, R. G. Moore, X. J. Zhou, G. F. Chen, J. L. Luo, N. L. Wang, Z. Hussain, D. J. Singh, I. R. Fisher, Z.-X. Shen
DOI 10.1103/PhysRevB.80.024515 · Physical Review B
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 high-resolution angle-resolved photoemission to study the electronic structure of the BaFe2As2 pnictides. We observe two electron bands and two hole bands near the X point, (π,π) of the Brillouin zone, in the paramagnetic state for electron-doped Ba(Co0.06Fe0.94)2As2, undoped BaFe2As2, and hole-doped Ba0.6K0.4Fe2As2. Among these bands, only the electron bands cross the Fermi level, forming two electron pockets around X while the hole bands approach but never reach the Fermi level. We show that the band structure of the BaFe2As2 family matches reasonably well with the prediction of local-density approximation calculations after a momentum-dependent shift and renormalization. Our finding resolves a number of inconsistencies regarding the electronic structure of pnictides.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba0.6K0.4Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37 | Pressure not reported | unknown |
| Ba(Co0.06Fe0.94)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25 | Pressure not reported | unknown |
Similar papers
Spin fluctuations and superconductivity in a three-dimensional tight-binding model for BaFe2As2
similarity 0.97S. Graser et al.
Source status unknown — claims are unverified
Deviating band symmetries and many-body interactions in a model hole-doped iron pnictide superconductor
similarity 0.97L. A. Wray et al.
Source status unknown — claims are unverified
Nonmagnetic Impurity Resonances as a Signature of Sign-Reversal Pairing in FeAs-Based Superconductors
similarity 0.96Degang Zhang
Source status unknown — claims are unverified
Electrodynamics of electron-doped iron pnictide superconductors: Normal-state properties
similarity 0.95N. Barišić et al.
Source status unknown — claims are unverified
Enhancement of superconducting transition temperature due to antiferromagnetic spin fluctuations in iron pnictides LaFe(As1−xPx)(O1−yFy): 31P-NMR studies
similarity 0.95H. Mukuda et al.
Source status unknown — claims are unverified
Structural, electronic, and magnetic properties of the possible pnictide superconductor BaFeAs2
similarity 0.95Zisheng Gong et al.
Source status unknown — claims are unverified