Magnetic resonance mode in superconducting FeSe single crystals
Measurements of the resonance peak can provide important information on the pairing state of an unconventional superconductor. The iron selenide FeSe superconductor (Tc=9 K), being simplest with respect to its crystal structure, is the most unusual compound among the large family of iron based high temperature superconductors. In single layer FeSe thin films grown on SrTiO3 (STO) substrate by molecular beam epitaxy (MBE), both Scanning Tunnelling Spectroscopy (STS) and angle-resolved photoemission spectroscopy (ARPES) experiments have shown that the band structure and the magnitude of the superconducting gap are very different from those of FeAs based superconductors. Because there is no hole pockets near the zone center, the naive Fermi surface nesting scenario seems not applicable here. In order to shed more light on the pairing state of FeSe superconductor and its related compounds, we propose to study spin fluctuation and its relationship with superconductivity in single crystalline FeSe.
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ZHAO Jun; FORREST Thomas; SCHMALZL Karin; SHEN Yao; STEFFENS Paul and Qisi Wang. (2014). Magnetic resonance mode in superconducting FeSe single crystals. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1335
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