MCATM Seminar Changgu ... - Monash University

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Jul 21, 2017 - mechanical, electrical and optical properties and have exhibited ... Changgu Lee joined the department of
Monash Centre for Atomically Thin Materials MCATM SEMINAR

Magnetic and Physical properties of new 2D materials Associate Professor Changgu Lee School of Mechanical Engineering & SKKU Advanced Institute of Nanotechnology Sungkyunkwan University, Republic of Korea Abstract: The representative 2D materials, graphene, h–BN, and MoS2, have interesting mechanical, electrical and optical properties and have exhibited fascinating physical phenomena so far. However, they mostly lack one important physical property in physics, magnetism. The new 2D materials such as CrSiTe3, CrI3, and FePS3, which began to be studied recently, possess ferro-or antiferro-magentic properties even in atomic level thickness and are expected to reveal deep level of physics in 2–dimensional confinement. In this talk, our recent works on thickness dependence of magnetic and optical properties of ternary 2D materials, Fe3GeTe2 and CrPS4, which are ferromagnetic and antiferromagnetic 2D materials, will be presented. Fe3GeTe2 was studied with hall measurement and STM methods. From the hall measurement, it exhibited the anomalous hall effect due to its intrinsic ferromagnetism. Interestingly, the magnetic properties such as coercivity changed significantly with decreasing thickness changing from weak ferromagnet to strong ferromagnet. STM study revealed some magnetic domains on the surface. About the Speaker: A/Prof. Changgu Lee joined the department of Mechanical Engineering and SKKU Advanced Institute of Nanotechnology, Suwon, Korea in 2010 after his postdoctoral appointment at Columbia University, New York, USA working with Prof. James Hone. Lee completed his PhD at Columbia University working on Power-MEMS for small energy generation. His current research interest is surrounding the synthesis and nanomechanics of atomically thin materials such as graphene and transition metal dichalcogenides.

Date: Venue:

Friday 21 July 2017 11:00AM – 12:00PM Room 407, Level 4, New Horizons Centre, 20 Research Way, Monash University, Clayton

Info: [email protected] monash.edu/mcatm