2016年7月4日 · High-quality single-layer FeSe thin film has been successfully grown on the SrTiO 3 (001) (STO) substrate 1 (see Methods for more details). A large superconducting gap, with a transition...

2024年4月20日 · One-unit-cell FeSe films on SrTiO 3 substrates are of great interest owing to significantly enlarged pairing gaps characterized by two coherence peaks at ±10 meV and ±20 meV. In-situ transport...

Iron chalcogenide solid solution FeSe 1−x S x is an important model system for investigating the relationship between superconductivity and nematicity. The parent material FeSe exhibits tetragonal-orthorhombic structural phase transition at Ts ~ 90 K, without a subsequent magnetic order at a lower temperature (11, 12).

2017年7月17日 · Here we combine molecular beam epitaxy (MBE) and STM together to reveal the mystery of FeSe. Figure 1b shows a typical STM topographic image of a 30-unit-cell FeSe film grown on STO.

Here, we report the observation of nodal superconductivity in iron selenide (FeSe) by use of a low-temperature scanning tunneling microscope (STM). We find that the symmetry of the order parameter is twofold instead of fourfold.

2022年11月17日 · In this review, we summarized recent STM studies on the vortex states of electron-doped FeSe-based superconductors such as (Li,Fe)OHFeSe and single-layer FeSe/SrTiO3. Zero-bias conductance peaks (ZBCP) are …

2015年10月16日 · Here, we present a quasi-particle interference (QPI) study of a single crystal of FeSe 0.4 Te 0.6 by STM. We illustrate breaking of C 4 symmetry in both the superconducting and normal states, and discuss its role in the formation of Cooper pairs at low temperatures. Further, we compare our results to QPI patterns calculated from a tight-binding ...

2024年10月18日 · Using in situ STM, large-area terraced surfaces and high atomic resolution of FeSe thin films were observed, marking layered FeSe growth via PLD. Hall and magnetoresistance measurements showed minimal changes in carrier concentration compared to FeSe / Ca F 2 films with T c of 8 K, and the Berezinskii-Kosterlitz-Thouless transition analysis ...

他们利用自行研制的多功能扫描隧道显微镜（STM+），成功地测量到了双分子层厚度的FeSe薄膜表面吸附钾原子之后的抗磁响应，观察到了钾原子吸附量对该薄膜超导特性的调控作用，并获得了各种超导参数（超导能隙、超导转变温度和超流密度等）在调控作用下 ...

2020年3月6日 · Using low-temperature scanning tunneling microscopy (STM), we studied the vortex states of single-layer FeSe film on a SrTiO 3 (100) substrate, and the local behaviors of superconductivity at sample boundaries.