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Regensburg 2010 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 11: CE: Low-dimensional Systems - Materials 2

TT 11.8: Vortrag

Dienstag, 23. März 2010, 11:30–11:45, H18

Longitundinal magnon in the AF chain system KCuF3Vladimir Gnezdilov1, •Peter Lemmens2, Dirk Wulferding2, Paolo Ghigna3, and Joachim Deisenhofer41ILTP, Kharkov, Ukraine — 2IPKM, TU-BS, Braunschweig — 3DCF, Univ. Pavia, Italy — 4Exp. Phys. V, CECM, Univ. Augsburg

The low energy longitudinal magnon in KCuF3 was observed and studied for the first time in Raman scattering at temperatures below the Neel temperature. The observation of a spinon continuum and this longitudinal mode reveals the coexistence of antiferromagnetic ordering and quantum fluctuations in KCuF3 for T<TN. Work supported by DFG.

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