题 目：Scanning tunneling microscopy of emergent topological matter

报告人：殷嘉鑫 博士后，普林斯顿大学Hasan课题组

时间：2020年9月16日上午9：00-10:00

地点：腾讯会议

报告摘要：

The search for topological matter is evolving towards strongly interacting systems including topological magnets and superconductors, where novel effects and unusual phases emerge from the quantum level interplay between geometry, correlation, and topology. Equipped with unprecedented spatial resolution, electronic detection, and magnetic tunability, scanning tunneling microscopy has become an advanced tool to probe and discover the emergent topological matter. In this talk, I will review the proof-of-principle methodology to study the elusive quantum topology in this discipline, with particular attention on the studies under a vector magnetic field as the new direction, and project future perspectives in tunneling into other hitherto unknown topological matter.

主要参考文献：

1.Jia-Xin Yin et al. Observation of a robust zero-energy bound state in iron-based superconductor Fe(Te,Se). Nature Physics 11, 543 (2015).

2.Jia-Xin Yin et al. Giant and anisotropic many-body spin–orbit tunability in a strongly correlated kagome magnet. Nature 562, 91-95 (2018).

3.S. S. Zhang, Jia-Xin Yin*, et al. Vector field controlled vortex lattice symmetry in LiFeAs using scanning tunneling microscopy. Phys. Rev. B 99, 161103(R) (2019).

4.Jia-Xin Yin et al. Negative flatband magnetism in a spin-orbit coupled kagome magnet. Nature Physics 15, 443–448 (2019).

5.Jia-Xin Yin* et al. Quantum phase transition of iron-based superconductivity in Li(Fe,Co)As. Phys. Rev. Lett. 123, 217004 (2019).

报告人简介：

Dr. Jiaxin Yin is currently a Postdoctoral Researcher in Prof. Zahid Hasan's team in Princeton University, USA, and focuses on the scanning tunneling microscopy of emergent topological matter, including topological magnets and superconductors. He received his Ph.D. degree in 2016 from Institute of Physics, CAS, under Prof. Hong Ding and Prof. Shuheng Pan. In 2015, he observed a Majorana-like zero-energy mode in an iron-based superconductor Fe(Te,Se) (Nature Physics 2015), which directly simulates later theoretical and experimental confirmation of nontrivial topology in several iron-based superconductors.

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