CRITICAL ISING MODES IN LOW-DIMENSIONAL KONDO INSULATORS

@article{Hur1999CRITICALIM,
  title={CRITICAL ISING MODES IN LOW-DIMENSIONAL KONDO INSULATORS},
  author={Karyn Le Hur},
  journal={Physical Review B},
  year={1999},
  volume={60},
  pages={9116-9121}
}
  • K. L. Hur
  • Published 1 April 1999
  • Physics
  • Physical Review B
We present an Ising-like intermediate phase for one-dimensional Kondo insulator systems. Resulting from a spinon splitting, its low-energy excitations are critical Ising modes, whereas the triplet sector has a spectral gap. It should occur as long as the Ruderman-Kittel-Kasuya-Yosida oscillation amplitude dominates over any direct exchange between localized spins. The chiral fixed point, however, becomes unstable in the far-infrared limit due to prevalent fluctuations among localized spins that… 

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