Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 25: Correlated Electrons - Poster Session
TT 25.9: Poster
Mittwoch, 29. März 2006, 14:30–18:30, P1
Electron Spin Resonance in sine-Gordon Spin Chains in the Perturbative Spinon Regime. — •S. Zvyagin1, J. Wosnitza1, A. Kolezhuk2, J. Krzystek3, and R. Feyerherm4 — 1Hochfeld-Magnetlabor Dresden (HLD), Forschungszentrum Rossendorf, 01314 Dresden, Germany — 2Institut fuer Theoretische Physik, Universitaet Hannover, 30167 Hannover, Germany — 3National High Magnetic Field Laboratory, Tallahassee, FL 32310, USA — 4Hahn-Meitner-Institut (HMI), 14109 Berlin, Germany
We report on low-temperature multi-frequency ESR studies of copper pyrimidine dinitrate, a spin-1/2 antiferromagnetic chain with alternating g-tensor and the Dzyaloshinskii-Moriya interaction, allowing us to test a new theoretical concept proposed recently by Oshikawa and Affleck [Phys. Rev. Lett. 82, 5136 (1999)]. Their theory, based on bosonization and the self-energy formalism, can be applied for precise calculation of ESR parameters of S = 1/2 antiferromagnetic chains in the perturbative spinon regime. Excellent quantitative agreement between the theoretical predictions and experiment is obtained. Results of the presentation are published in: S.A. Zvyagin et al., Phys. Rev. Lett. 95, 017207, 2005.