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Exact diagonalization results for multimagnon IR absorption in the cuprates (1995)

Lorenzana, J. ; Eder, R. ; Meinders, M. ; [weitere]

Springer

Journal of superconductivity 8 (1995), S. 567-570

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Details

ISSN: 1572-9605

Schlagwort(e): Antiferromagnetism ; Optical properties ; Heisemberg model

Quelle: Springer Online Journal Archives 1860-2000

Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik

Notizen: Abstract Recent measured bands in the mid IR of parent insulating compounds of cuprate superconductors [Perkins et al. Phys. Rev. Lett.71 1621 (1993)] are interpreted as multimagnon infrared (IR) absorption assisted by phonons. We present results for the coupling constant of light with this excitations and exact diagonalization results for the spectra and compare with interacting spin wave theory. The observed structures correspond to the absorption of one phonon plus two magnons and one phonon plus higher multimagnon absorption processes. Our results imply that IR absorption can be used as a unique probe of quantum antiferromagnetic systems.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00727427

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