Online Spintronics Seminar 51 Ahmet Avsar

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Spintronics in Two-Dimensional Materials and van der Waals Heterostructures • This online seminar was given on December 11, 2020, by Prof. Ahmet Avsar of Newcastle University. Please refer to https://www.spintalks.org for more information about the Online Spintronics Seminar Series. • Electron spin is an important degree of freedom which can complement charge in information storage and logic devices. With respect to the material selection for spintronics, two-dimensional (2D) materials and their van der Waals heterostructures offer new opportunities that are unfeasible in bulk materials. Remarkable recent advances in 2D-based spintronic research allow us to approach the realization of practical applications [1]. • In this seminar, I will first discuss the basics of graphene spintronics and our attempts for solving its major challenges. Our advancements include optospintronics functionality and realization of a spin switch effect have been achieved by creating artificial interfaces with other 2D crystals such as boron nitride and transition metal dichalcogenides [2-3]. In the second part of my talk, I will discuss our spin transport measurements performed in a 2D semiconductor material. I will introduce ultra-thin, semiconducting black phosphorus as a promising material for possible spintronics applications requiring rectification and amplification actions [4]. I will demonstrate that its spin transport properties can be manipulated in a transistor-like manner by just controlling the electric field even at room temperature thanks to its semiconducting nature. • 1. A. Avsar et al., Rev. Mod. Phys., 92 (2), 021003 (2020). • 2. A. Avsar et al., NPG Asia Mater., 8, e274 (2016). • 3. A. Avsar et al., ACS Nano, 11 (11), 11678–11686 (2017). • 4. A. Avsar et al., Nat. Phys., 13, 888-894 (2017).

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