Details

Autor(en) / Beteiligte

• Ge, Jian-Feng
• Liu, Zhi-Long
• Liu, Canhua
• Gao, Chun-Lei
• Qian, Dong
• Xue, Qi-Kun
• Liu, Ying
• Jia, Jin-Feng

Titel

Superconductivity above 100 K in single-layer FeSe films on doped SrTiO3

Ist Teil von

• Nature materials, 2015-03, Vol.14 (3), p.285-289

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2015

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.