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

Zvyagin, S. A.; Kolezhuk, A. K.; Krzystek, J.; Feyerherm, R.

We report the 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.

Keywords: EPR; electron paramagnetic resonance; electron spin resonance; high magnetic field; ESR

  • Physical Review Letters 95(2005), 017207-1-4

Permalink: https://www.hzdr.de/publications/Publ-7849
Publ.-Id: 7849