Chemistry Seminar Series: Hyun Ho KimExport this event to calendar

Wednesday, September 18, 2019 — 2:30 PM EDT

Two-Dimensional Magnetism and its Applications for Spintronic Devices

Hyun Ho Kim
Department of Chemistry and Institute for Quantum Computing
University of Waterloo

Wednesday, September 18, 2019
2:30 p.m.
C2-361 (Reading Room)

Abstract

The family of two-dimensional (2D) materials has grown rapidly from semimetals and semiconductors to systems exhibiting collective electronic properties. In particular, several 2D magnetic compounds have recently been discovered. Experimental observations of the magnetic ground state in single atomic layers of such materials are not only important for fundamental interest, but also technologically relevant 
for next-generation spintronic devices. In this talk, I will present studies of atomically thin magnetic semiconductors CrX3 (X= Cl, Br, and I) as well as their device applications. By sandwiching CrX3 between few-layer graphene electrodes, we are able to fabricate high-quality van der Waals magnetic tunnel junctions and electrically probe the magnetic properties of the three materials. Moreover, we found that CrI3 exhibits an extremely large tunnel magnetoresistance (~106%) as well as a robust memristive switching behavior that is tunable with magnetic field.

Location 
C2 - Chemistry 2
Room 361
200 University Avenue West

Waterloo, ON N2L 3G1
Canada

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