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TT: Tiefe Temperaturen
TT 25: Correlated Electrons - Poster Session
TT 25.19: Poster
Wednesday, March 29, 2006, 14:30–18:30, P1
Spectroscopic investigations of 2D J1-J2 quantum spin systems — •P. Scheib1, V. Gnezdilov2, P. Lemmens1, S. Gonthier3, P. Millet3, E. Kaul4, and Ch. Geibel4 — 1IPKM, TU Braunschweig, Germany — 2B.I. Verkin Inst. for Low Temp. Physics, NASU, Ukraine — 3CEMES, Toulouse, France — 4MPI-CPfS, Dresden, Germany
The interest in frustrated 2D quantum spin system is increasing as novel system have been discovered that enlarge the parameter space from 2D AF to mixed AF/FM systems. We report Raman scattering results on Li2VOSiO4, Pb2VO(PO4)2, and (Sr,Ba)ZnVO(PO4)2 to compare the effect of the local structure on the resulting AF and AF/FM couplings. This work has been supported partly by the ESF-HFM.