论文标题
FE-VACANCY ORDED FE4SE5：FESE超导体的绝缘母体阶段
Fe-vacancy ordered Fe4Se5: The insulating parent phase of FeSe superconductor
论文作者
论文摘要
我们已经进行了一项详细的研究，以研究FESE超导体的绝缘父阶段的存在。具有特定Fe-Vacancy顺序的绝缘Fe4SE5显示出3D-mott可变范围跳跃行为，在45 K左右的verwey样电子相关性。在450 Celcius度上，RTA过程的应用导致Fe-Vacancy序列的破坏，并通过增加Fe3+ Valcentent+ Ve3+ Valcention来诱导更多的电子载体。在RTA过程后，超导率在TC〜8K中出现，而没有更改样品的化学计量法，从而导致添加额外的载体以支持超导性。
We have carried out a detailed study to investigate the existence of an insulating parent phase for FeSe superconductor. The insulating Fe4Se5 with specific Fe-vacancy order shows a 3D-Mott variable range hopping behavior with a Verwey-like electronic correlation at around 45 K. The application of the RTA process at 450 celcius degree results in the destruction of Fe-vacancy order and induces more electron carriers by increasing the Fe3+ valence state. Superconductivity emerges with Tc ~ 8K without changing the chemical stoichiometry of the sample after the RTA process by resulting in the addition of extra carriers in favor of superconductivity.
