University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Wednesday, November 9th 2016
2:30 pm:
Condensed Matter Seminar in Physics 110 PAN
Speaker: Ioannis Rousochatzakis, University of Minnesota
Subject:  Classical spin liquid instability driven by off-diagonal exchange in strong spin-orbit magnets

I will show that Mott insulators with strong spin-orbit coupling and bond-dependent interactions host yet another strongly correlated regime, besides the well-known Kitaev quantum spin liquid [1]. This regime is governed by a classical spin liquid instability and unconventional spin-spin correlations along closed or open strings. The key predictions are common for all available 2D and 3D tri-coordinated materials with bond-directional anisotropy, and provide a consistent interpretation of the suppression of the x-ray magnetic circular dichroism signal reported recently [2] in β-Li2IrO3 under pressure.

[1] I. Rousochatzakis and N. B. Perkins, arXiv:1610.08463v1
https://arxiv.org/abs/1610.08463
[2] T. Takayama et al., Phys. Rev. Lett. 114, 077202 (2015).
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.077202

Faculty Host: Natalia Perkins

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