Spin jams tessellations and exotic entropy scaling

by Israel Klich

at Condensed Matter Theory Seminar

Wed, 06 Jan 2016, 13:30
Physics building (#54) room 207

Abstract

When spins are regularly arranged in a triangular fashion the spins may not satisfy simultaneously their antiferromagnetic interactions with their neighbors This phenomenon called frustration may lead to a large set of ground states and to exotic states such as spin ice and spin liquid Motivated by puzzling behavior of certain magnetic systems such as SCGO we suggest how a clean system governed by simple Heisenberg interactions freezes into a glass like state induced by quantum fluctuations in contrast to the usual mechanisms for classical spin glass which rely on the presence of disorder At the heart of the effect is an unusual scaling of the number of local minima with a scaling extensive in the boundary length rather than the volume We establish these properties by a combination of tools and mappings leading to a problem of counting tessellations Recent experimental evidence for the spin jam scenario will also be presented

Created on 03-01-2016 by Bar Lev, Yevgeny (ybarlev)
Updaded on 03-01-2016 by Bar Lev, Yevgeny (ybarlev)