Condensed-Matter Physics & Materials Science Seminar

"Playing a lego game for a quasi-two-dimensional frustrated magnet"

Presented by Seunghun Lee, University of Virginia

Tuesday, March 27, 2012, 10:00 am — Small Seminar Room, Bldg. 510

In this talk, we will consider complex magnetic interactions in a kagome-triangular-kagome trilayer antiferromagnet. I will present a simple and eloquent way of understanding the physics by mapping the magnetic interactions onto a problem of an ordered tricolor and a disordered binary sign degree of freedom. By doing so, we will show a systematic way of constructing different classical ground states, and will identify possible zero-energy excitations that involve 'partial but extended' numbers of spins in the system. Due to the unique properties of the ground state, we argue that a spin glass might be the ground state for this quasi-two-dimensional frustrated magnet

Hosted by: Guangyong Xu

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