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SYWH: Symposium Physics of van der Waals 2D heterostructures

SYWH 1: Symposium: Physics of van der Waals 2D heterostructures

SYWH 1.1: Invited Talk

Thursday, September 30, 2021, 13:30–14:00, Audimax 2

Spin interactions in van der Waals topological materials and magnets — •Saroj Dash — Chalmers University of Technology, Gothenburg, Sweden

Two-dimensional (2D) quantum materials and their van der Waals heterostructures represent a novel platform to realize different spin-based phenomena. Here, we used large-area CVD graphene as a spin interconnect and demonstrated a spin majority logic gate operation (1). We further engineered 2D material heterostructures by combining the best of different materials in one ultimate unit for the creation of strong proximity induced spin-orbit coupling and magnetism in graphene (2,4,3). Recently, we detected current-induced spin-polarization in topological insulators and Weyl semimetal candidates and their graphene-based heterostructures up to room temperature (4,5). Finally, we demonstrated room temperature spin-valve devices using van der Waals itinerant ferromagnet in heterostructures with graphene (6). These findings open a novel platform for electrical creation and gate-control of spin polarization and provide new opportunities for all-2D heterostructure spintronic devices and integrated circuits.

1. Carbon 161, 892 (2020), Nature Commun. 6, 6766 (2015). 2. Nature Commun. 8, 16093 (2017). 3. 2D Materials 7 (1), 015026 (2019). 4. Nature Commun. 11, 3657 (2020). 5. Advanced Materials, 2000818 (2020). 6. preprint arXiv:2107.00310 (2021).