論文

査読有り
2018年9月14日

Magnetic field induced quantum criticality and the Luttinger sum rule

PHYSICAL REVIEW B
  • Nishikawa Y
  • ,
  • Curtin O. J
  • ,
  • Hewson A. C
  • ,
  • Crow D. J. G

98
10
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevB.98.104419

We show that when there is a sudden transition from a small to a large Fermi surface at a field-induced quantum critical point—similar to what may have been observed in some heavy-fermion compounds—an additional term has to be taken into account in the Luttinger-Friedel sum rule. We calculate this additional term for a local model which has a field-induced quantum critical point (QCP) and show that it changes abruptly at the transition, such that it satisfies a generalized Luttinger-Friedel sum rule on each side of the transition, and characterizes the two Fermi-liquid phases separated by the QCP as a discrete (topological) index.

https://arxiv.org/abs/1712.08771

リンク情報
DOI
https://doi.org/10.1103/PhysRevB.98.104419

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