Condensed Matter - FEW SURPRISES OF 2D MAGNETISM: From Magnon Breakdown to Magnetic Graphene

Speaker: Je-Geun Park

From: Seoul National University

When: Friday, March 10, 2017: 4:00 PM - 5:00 PM

Where: 200 Brockman Hall for Physics

Abstract:

Materials we are familiar with display amazingly beautiful phenomena. Despite the apparent complexity, however we also know that the underlying basic principles of three-dimensional materials, except for some rare cases, are in fact well accounted for by a couple of simple concepts like quasiparticles and scaling. But it works only up to a point. For example, these comfortable ideas begin to breakdown when one reduces the dimension of materials. In this talk, I will discuss how we have discovered the breakdown of magnon, which is otherwise a stable quasiparticles of magnetic systems [1,2]. And I will also sketch some of potentials offered by a new class of two-dimensional magnetic van der Waals materials [3-5]. [1] Joosung Oh, et al., Phys. Rev. Lett. 111, 257202 (2013) [2] Joosung Oh, et al., Nature Communications 7, 13146 (2016) [3] [Viewpoint] Je-Geun Park, J. Phys. Condens. Matter 28, 301001 (2016) [4] Cheng-Tai Kuo, et al., Scientific Reports 6, 20904 (2016) [5] Jae-Ung Lee, et al., Nano Lett. 16, 7433 (2016)

Location: Brockman Hall for Physics - Room 200
Brockman Hall for Physics
Houston , Texas 77005

Date: March 10, 2017, 4 p.m. - March 10, 2017, 5 p.m.