| Issue |
EPL
Volume 92, Number 5, December 2010
|
|
|---|---|---|
| Article Number | 57012 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/92/57012 | |
| Published online | 24 December 2010 | |
Pseudogap-less high-Tc superconductivity in BaCoxFe2−xAs2
1
Van der Waals-Zeeman Institute, University of Amsterdam - 1018XE Amsterdam, The Netherlands, EU
2
SLAC National Accelerator Center, Stanford University - Menlo Park, CA 94025, USA
Received:
23
September
2010
Accepted:
25
November
2010
The pseudogap state is one of the peculiarities of the cuprate high-temperature superconductors. Here we investigate its presence in BaCoxFe2−xAs2, a member of the pnictide family, with temperature-dependent scanning tunneling spectroscopy. We observe that for under, optimally and overdoped systems the gap in the tunneling spectra always closes at the bulk Tc, ruling out the presence of a pseudogap state.
PACS: 74.25.Jb – Electronic structure (photoemission, etc.) / 74.70.Xa – Pnictides and chalcogenides / 68.37.Ef – Scanning tunneling microscopy (including chemistry induced with STM)
© EPLA, 2010
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