Fabrication of Single-Atomic-Layer Stanene on Ferromagnetic Co Nanoislands

Yi-Hao Zhuang^1*, Chia-Ju Chen¹, Guan-Yu Chen¹, Yen-Hui Lin¹, Nitin Kumar¹, Pin-Jui Hsu¹

¹Department of Physics, National Tsing Hua University, Hsinchu City, Taiwan

* Presenter:Yi-Hao Zhuang, email:yihao0425@gmail.com

Magnetic topological insulator is a promising candidate that has been predicted to show quantum anomalous Hall effect with tunable topological properties, leading to important spintronics applications especially with low-power consumption. We have successfully fabricated monolayer stanene – the tin counterpart of graphene – on ferromagnetic Co nanoislands/ Cu(111) by low temperature growth. From the results of scanning tunneling microscope and spectroscopy (STM/STS), we have resolved the local surface state nearby the Fermi level on top of stanene on Co island and corresponding standing wave patterns emerged from the edges of stanene. Furthermore, Stanene/Co nanoislands measure the hysteresis curve and out of plane magnetization by employing spin-polarized STM and STS (SP-STM/STS) under external applied magnetic fields.

Keywords: Spin polarized scanning tunneling microscope, Magnetic topological insulator, Hysteresis curve, Honeycomb structure, Standing wave pattern