Spin-lattice interaction in the quasi-one-dimensional helimagnet LiCu2O2

László Mihály, Balázs Dóra, András Ványolos, Helmuth Berger, László Forró

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41 Citations (Scopus)


The field dependence of the electron spin resonance in a helimagnet LiCu2O2 was investigated for the first time. In the paramagnetic state, a broad resonance line was observed corresponding to a g factor of 2.3. In the critical regime, around the paramagnetic to helimagnetic phase transition the resonance broadens and shifts to higher frequencies. A narrow signal is recovered at a low temperature, corresponding to a spin gap of 1.4 meV in zero field. A comprehensive model of the magnons is presented, using exchange parameters from neutron scattering [T. Masuda Phys. Rev. BPRBMDO0163-1829 72, 014405 (2005)10.1103/PhysRevB.72.014405] and the spin anisotropy determined here. The role of the quantum fluctuations is discussed.

Original languageEnglish
Article number067206
JournalPhysical review letters
Issue number6
Publication statusPublished - Aug 18 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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