S A Zvyagin et al 2006 J. Phys.: Conf. Ser. 51 39 doi:10.1088/1742-6596/51/1/006
S A Zvyagin1, J Wosnitza1, A K Kolezhuk2, J Krzystek3 and R Feyerherm4
Show affiliationsThe magnetic-excitation spectrum of copper pyrimidine dinitrate, a material containing S = 1/2 antiferromagnetic chains with alternating g-tensor and the Dzyaloshinskii-Moriya interaction, and exhibiting a field-induced spin gap, is probed using tunable-frequency electron spin resonance spectroscopy in magnetic fields up to 25 T. The data are interpreted in frame of the sine-Gordon quantum-field theoretical concept proposed recently by Oshikawa and Affleck. The field-induced gap is measured directly; signatures of soliton and three breather branches are identified.
Issue 1 (2006)
S A Zvyagin et al 2006 J. Phys.: Conf. Ser. 51 39
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