Onset of the Meissner effect at 65 K in FeSe thin film grown on Nb doped SrTiO3 substrate

Abstract

We report the Meissner effect studies on an FeSe thin film grown on Nb doped SrTiO3 substrate by molecular beam epitaxy. Two-coil mutual inductance measurement clearly demonstrates the onset of diamagnetic screening at 65 K, which is consistent with the gap opening temperature determined by previous angle resolved photoemission spectroscopy results. The applied magnetic field causes a broadening of the superconducting transition near the onset temperature, which is the typical behavior for quasi-two-dimensional superconductors. Our results provide direct evidence that FeSe thin film grown on Nb doped SrTiO3 substrate has an onset TC ~ 65 K, which is the highest among all iron based superconductors discovered so far.

9 pages, 3 figures, updated reference list

References in corpus (3)

• Superconductivity in single-layer films of FeSe with a transition temperature above 100 K
• Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO
• The Meissner effect in a strongly underdoped cuprate above its critical temperature

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