Onset of the Meissner effect at 65 K in Fe Se thin film grown on Nb-doped Sr TiO_3 substrate  

作　　者：Zuocheng Zhang Yi-Hua Wang Qi Song Chang Liu Rui Peng K.A.Moler Donglai Feng Yayu Wang 

机构地区：[1]State Key Laboratory of Low Dimensional Quantum Physics,Department of Physics, Tsinghua University [2]Collaborative Innovation Center of Quantum Matter [3]State Key Laboratory of Surface Physics, Department of Physics,Fudan University [4]Stanford Institute for Materials and Energy Science, Stanford University [5]Collaborative Innovation Center of Advanced Microstructures,Fudan University

出　　处：《Science Bulletin》2015年第14期1301-1304,共4页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation and Ministry of Science and Technology of China(2015CB921000 and 2012CB921402);Yihua Wang is partially supported by the Urbanek Fellowship of the Department of Applied Physics at Stanford University;K.A.Moler is supported by the Department of Energy,Office of Science,Basic Energy Sciences,Materials Sciences and Engineering Division,under Contract DEAC02-76SF00515

摘　　要：We report the Meissner effect studies on an Fe Se thin film grown on Nb-doped Sr Ti O3 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 Fe Se thin film grown on Nb-doped Sr Ti O3 substrate has an onset TC* 65 K,which is the highest among all iron-based superconductors discovered so far.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.

关 键 词：Meissner effect. FeSe thin film SrTiO3substrate Quasi-two-dimensional superconductors .Iron-based superconductors 

分 类 号：TB383.2[一般工业技术—材料科学与工程]