Signature of antiferromagnetic long-range order in the optical spectrum of strongly correlated electron systems

Details Signature of antiferromagnetic long-range order in the optical spectrum of strongly correlated electron systems Signature of antiferromagnetic long-range order in the optical spectrum of strongly correlated electron systems

2011-12-21

arxiv.org/abs/1112.5003v1

Phys. Rev. B 85, 085124 (2012)

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 9 figures

Scientific paper

10.1103/PhysRevB.85.085124

We show how the onset of a non-Slater antiferromagnetic ordering in a correlated material can be detected by optical spectroscopy. Using dynamical mean-field theory we identify two distinctive features: The antiferromagnetic ordering is associated with an enhanced spectral weight above the optical gap, and well separated spin-polaron peaks emerge in the optical spectrum. Both features are indeed observed in LaSrMnO_4 [G\"ossling et al., Phys. Rev. B 77, 035109 (2008)]

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