Strong electron pairing at the iron 3dxz,yz orbitals in hole-doped BaFe2As2 superconductors revealed by angle-resolved photoemission spectroscopy
D. V. Evtushinsky, V. B. Zabolotnyy, T. K. Kim, A. A. Kordyuk, A. N. Yaresko, J. Maletz, S. Aswartham, S. Wurmehl, A. V. Boris, D. L. Sun, C. T. Lin, B. Shen, H. H. Wen, A. Varykhalov, R. Follath, B. Büchner, S. V. Borisenko
DOI 10.1103/PhysRevB.89.064514 · 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
Using the angle-resolved photoemission spectroscopy (ARPES) with resolution of all three components of electron momentum and electronic states symmetry, we explicate the electronic structure of hole-doped BaFe2As2, and show that widely discussed nesting and dimensionality of Fermi surface (FS) sheets have no immediate relation to the superconducting pairing in iron-based superconductors. Alternatively a clear correlation between the orbital character of the electronic states and their propensity to superconductivity is observed: The magnitude of the superconducting gap maximizes at 10 meV exclusively for iron 3dxz,yz orbitals, while for others drops to 3 meV. Presented results imply that the relation between superconducting and magnetostructural transitions goes beyond simple competition for FS, and demonstrate importance of orbital physics in iron superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba1-xKxFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure not reported | unknown |
| Ba1-xNaxFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 34 | Pressure not reported | unknown |
Similar papers
Universality of superconducting gaps in overdoped Ba0.3K0.7Fe2As2 observed by angle-resolved photoemission spectroscopy
similarity 0.96K. Nakayama et al.
Source status unknown — claims are unverified
Spin fluctuations and superconductivity in a three-dimensional tight-binding model for BaFe2As2
similarity 0.96S. 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 0.95L. A. Wray et al.
Source status unknown — claims are unverified
Spin resonance peak in Fe-based superconductors with unequal gaps
similarity 0.95M. M. Korshunov et al.
Source status unknown — claims are unverified
Hund's coupling governed orbital-selective superconductivity in Ba1−xKxFe2As2
similarity 0.95Elena Corbae et al.
Source status unknown — claims are unverified
Strong correlations, strong coupling, and s-wave superconductivity in hole-doped BaFe2As2 single crystals
similarity 0.95F. Hardy et al.
Source status unknown — claims are unverified