| 研究開始時の研究の概要 |
This project will study the high temperature superconductivity in iron chalcogenides via combining the micro-structure fabricating and ion-gating techniques. I will perform transport measurements (resistivity, Hall effect, angle-dependent magnetoresistance, depairing current density, and tunneling spectroscopy) on the micro-structure fabricated Fe(TeSe) EDL device under magnetic field. This project will reveal the evolution of the band structure with the increase of Tc. The key factors directly related to the high temperature superconductivity in FeCh system will be addressed.
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| 研究実績の概要 |
We have performed a systematical study of the transport properties on a c-axis lamella of FeSe prepared by the FIB pick-up technique. With this lamella, we can put contacts along the c-axis, to directly measure the out-of-plane transport properties. With the decrease of temperature, ρc firstly slightly increases until ~220 K, then decreases, manifesting a hump-like behavior. Such temperature dependent behavior is quite different from the in-plane resistivity ρab, which shows a metallic behavior, continually decreasing with temperature. Besides, we also studied the current-voltage curve, critical current density, upper critical fields, and magnetoresistance to reveal the out-of-plane electrical properties of FeSe.
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