Low temperature electron spin resonance of the Kondo ion in a heavy fermion metal: YbRh2Si2.

@article{Sichelschmidt2003LowTE,
  title={Low temperature electron spin resonance of the Kondo ion in a heavy fermion metal: YbRh2Si2.},
  author={J{\"o}rg Sichelschmidt and V. A. Ivanshin and J Ferstl and C Geibel and Frank Steglich},
  journal={Physical review letters},
  year={2003},
  volume={91 15},
  pages={156401}
}
We report an electron spin resonance (ESR) study on single crystals of the heavy fermion metal YbRh2Si2 which shows pronounced non-Fermi liquid behavior related to a close antiferromagnetic quantum critical point. It is shown that the observed ESR spectra can be ascribed to a bulk Yb3+ resonance. This is the first observation of ESR of the Kondo ion itself in a dense Kondo lattice system. The ESR signal occurs below the Kondo temperature (T(K)) which thus indicates the existence of large… CONTINUE READING

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