物理学报Issue(3)：037401-1-037401-6,6.DOI:10.7498/aps.63.037401
K0.8Fe2Se2晶体c轴向载流子输运特性的研究
Investigation of carrier transp ort prop erties along the c-axis in K0.8Fe2Se2 superconducting crystals
摘要
Abstract
We have successfully prepared the iron-based superconductor K0.8Fe2Se2 crystals (Tc=27 K) and studied the carrier transport properties along the c-axis in detail. Samples are characterized by XRD, SEM and temperature-dependent resistivity. The result shows that there is “phase separation” in the samples. Based on the experimental results, the iron-based superconductor is not a simple two phases alternating along the c-axis, but the metal phases should have weak-link channels along the c-axis, forming a nearly 3D special net mode. Studies of the thermal conductivity and the complex impedance spectrum z(omega, T0) suggest that the superconducting crystals have a lot of grain boundaries along the c-axis direction, the bound polarization charges result in relative dielectric constant of about 106 in magnitude and negative phase characteristics in the vicinity of 10 MHz.关键词
铁基超导体/输运特性/阻抗谱/相分离Key words
iron-based superconductor/transport properties/impedance spectrum/phase separation引用本文复制引用
晏潜,陆翠敏,冯电稳,杨巍巍,赵捷,刘庆锁,马永昌..K0.8Fe2Se2晶体c轴向载流子输运特性的研究[J].物理学报,2014,(3):037401-1-037401-6,6.基金项目
国家自然科学基金(批准号:10704054)资助的课题 （批准号:10704054）
