Band- and momentum-dependent electron dynamics in superconducting Ba(Fe1−xCox)2As2 as seen via electronic Raman scattering
B. Muschler, W. Prestel, R. Hackl, T. P. Devereaux, J. G. Analytis, Jiun-Haw Chu, I. R. Fisher
DOI 10.1103/PhysRevB.80.180510 · Physical Review B
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Abstract
We present details of carrier properties in high quality Ba(Fe1−xCox)2As2 single crystals obtained from electronic Raman scattering. The experiments indicate a strong band and momentum anisotropy of the electron dynamics above and below the superconducting transition, highlighting the importance of complex band-dependent interactions. The presence of low-energy spectral weight deep in the superconducting state suggests a gap with accidental nodes, which may be lifted by doping and/or impurity scattering. When combined with other measurements, our observation of band- and momentum-dependent carrier dynamics indicate that the iron arsenides may have several competing superconducting ground states.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba(Fe1-xCox)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 24 | Pressure not reported | onset |
| Ba(Fe1-xCox)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 22 | Pressure not reported | onset |
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