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Dresden 2014 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 55: Correlated Electrons: Quantum-Critical Phenomena - Experiment II

TT 55.2: Talk

Wednesday, April 2, 2014, 11:30–11:45, HSZ 204

Spin dynamics in the Haldane compound SrNi2V2O8Vladimir Gnezdilov1,2, •Peter Lemmens1, Anup Kumar Bera3, ATM Nazmul Islam3 und Bella Lake31TU-BS, Braunschweig — 2ILTPE NAS, Ukraine — 3HZBME, Helmholtz-Zentrum, Berlin

We present a Raman scattering study of the quasi-one-dimensional Haldane chain compound SrNi2V2O8. In contrast to simple expectations, complex temperature-dependent magnetic excitations exist. Our observations provide strong evidence that SrNi2V2O8 is indeed close to the phase boundary that separates a spin-liquid and an Ising-like ordered state on the Sakai-Takahashi phase diagram.

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