Magnons in tetragonal CuO

S. Moser, N.E. Shaik, D. Samal, S. Fatale, B. Dalla Piazza, M. Dantz, J. Pelliciari, P. Olalde-Velasco, T. Schmitt, Gertjan Koster

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We investigate by resonant inelastic x-ray scattering the magnetic excitations in thin films of tetragonal CuO. We identify a spin wave excitation, dispersing on two cupratelike antiferromagnetic sublattices. Its energy at the boundary of the Brillouin zone (220 meV), is significantly lower than typical values (E ∼300 meV) found in two-dimensional cuprates. A spin wave expansion starting from an extended Hubbard model suggests two possible scenarios for this energy lowering.
Original languageEnglish
Article number140404
Pages (from-to)-
Number of pages5
JournalPhysical review B: Condensed matter and materials physics
Issue number14
Publication statusPublished - 6 Oct 2015


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