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Superconductivity above 100 K in single-layer FeSe films on doped SrTiO3.
- Source :
-
Nature Materials . Mar2015, Vol. 14 Issue 3, p285-289. 5p. 1 Color Photograph, 3 Graphs. - Publication Year :
- 2015
-
Abstract
- Recent experiments on FeSe films grown on SrTiO3 (STO) suggest that interface effects can be used as a means to reach superconducting critical temperatures (Tc) of up to 80 K (ref. ). This is nearly ten times the Tc of bulk FeSe and higher than the record value of 56 K for known bulk Fe-based superconductors. Together with recent studies of superconductivity at oxide heterostructure interfaces, these results rekindle the long-standing idea that electron pairing at interfaces between two different materials can be tailored to achieve high-temperature superconductivity. Subsequent angle-resolved photoemission spectroscopy measurements of the FeSe/STO system revealed an electronic structure distinct from bulk FeSe (refs , ), with an energy gap vanishing at around 65 K. However, ex situ electrical transport measurements have so far detected zero resistance-the key experimental signature of superconductivity-only below 30 K. Here, we report the observation of superconductivity with Tc above 100 K in the FeSe/STO system by means of in situ four-point probe electrical transport measurements. This finding confirms FeSe/STO as an ideal material for studying high-Tc superconductivity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14761122
- Volume :
- 14
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Nature Materials
- Publication Type :
- Academic Journal
- Accession number :
- 101062471
- Full Text :
- https://doi.org/10.1038/nmat4153