Phonon-assisted IR spectroscopy of quantum antiferromagnets

Jose Lorenzana; R. Eder; George A. Sawatzky

doi:10.1117/12.241761

10 June 1996 Phonon-assisted IR spectroscopy of quantum antiferromagnets

Jose Lorenzana, R. Eder, George A. Sawatzky

Proceedings Volume 2696, Spectroscopic Studies of Superconductors; (1996) https://doi.org/10.1117/12.241761
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

We review recent theoretical results for multimagnon-phonon assisted infrared absorption in antiferromagnetic Heisenberg systems. We show spin wave theory line shapes for 2D spin 1/2 systems (like the parent insulating high-Tc cuprates) 1D spin 1/2 systems and 2D spin 1 systems (like the nickelates) and exact diagonalization results in two-dimensional spin 1/2 systems. The theoretical line shapes are compared with experiments. In the case of cuprates they explain mid-infrared peaks observed in the insulator. In the case of the nickelates a predicted line shape is also shown to agree with the experiments. We discuss the possibility to observe these excitations in other experiments.

Citation Download Citation

Jose Lorenzana, R. Eder, and George A. Sawatzky "Phonon-assisted IR spectroscopy of quantum antiferromagnets", Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); https://doi.org/10.1117/12.241761

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