Electron Spin Resonance in Sine-Gordon Spin Chains in the Perturbative Spinon Regime
Electron Spin Resonance in Sine-Gordon Spin Chains in the Perturbative Spinon Regime
We report the low-temperature multifrequency 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 self-energy …