Band- and momentum-dependent electron dynamics in superconducting Ba(Fe1-xCox)2As2 as seen via electronic Raman scattering
We present details of carrier properties in high quality Ba(Fe{sub 1-x}Co{sub x}){sub 2}As{sub 2} 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.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 972690
- Report Number(s):
- SLAC-REPRINT-2010-001; TRN: US201005%%259
- Journal Information:
- Physical Review B, Journal Name: Physical Review B; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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