报告题目：

Exploring quantum magnets and quantum materials with low-temperature scanning tunneling microscope

报告人：

颜世超 助理教授、研究员

上海科技大学 物质科学与技术学院

邀请人：

魏巍 副研究员

报告时间：

2017年5月19日上午 10:00

报告地点：

知新楼C座702量子报告厅

报告内容：

Scanning tunneling microscope (STM) is a powerful tool in studying atomic-scale nanomagnets and quantum materials by imaging, atom manipulation and performing local spectroscopy. In the first of my talk, I will talk about exploring single-atom or few-atom quantum magnets with low-temperature and high magnetic field STM. By combining all electronic pump-probe technique with low-temperature STM, we measure the spin dynamics of artificially constructed quantum magnets down to nanosecond time resolution. We also find that their spin dynamics can be fully controlled by tuning the atomic exchange coupling with the magnetic STM tip. In addition, we demonstrate that the atomic quantum magnets can be used as spin sensors to remotely sense the magnetic states of nearby nano-antiferromagnets. In the second part of my talk, I will talk about using low-temperature STM to study the charge density wave (CDW) and superconducting materials (1T-TMDs, 1T-TiSe₂ and 1T-Cu_0.08TiSe₂).

References:

1. S. Yan et al., Nano Lett. 15, 1938–1942 (2015)

2. S. Yan et al., Nature Nano. 10, 40–45 (2105)

3. S. Yan et al., Science Advances (in press)

4. S. Yan et al., Phys. Rev. Lett. 118, 106405 (2017)

报告人简介：

颜世超，男，上海科技大学物质科学与技术学院，助理教授&研究员。2012年在中科院物理所获理学博士学位，2012–2017年先后于马普所，伊利诺伊大学香槟分校任博士后研究员。长期从事低温扫描隧道显微镜的实验研究，主要进行原子尺度自旋动力学和量子材料的实验研究。在Nature Nanotech., Phys. Rev. Lett., ACS Nano, Nano Lett., Science Advances等期刊上发表诸多论文。

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