論文

2013年4月5日

Topological phase in a two-dimensional metallic heavy-fermion system

Physical Review B - Condensed Matter and Materials Physics
  • Tsuneya Yoshida
  • ,
  • Robert Peters
  • ,
  • Satoshi Fujimoto
  • ,
  • Norio Kawakami

87
16
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevB.87.165109

We report on a topological insulating state in a heavy-fermion system away from half filling, which is hidden within a ferromagnetic metallic phase. In this phase, the cooperation of the RKKY interaction and the Kondo effect, together with the spin-orbit coupling, induces a spin-selective gap, bringing about topologically nontrivial properties. This topological phase is robust against a change in the chemical potential in a much wider range than the gap size. We analyze these remarkable properties by using dynamical mean field theory and the numerical renormalization group. Its topological properties support a gapless chiral edge mode, which exhibits a non-Tomonaga-Luttinger liquid behavior due to the coupling with bulk ferromagnetic spin fluctuations. We also propose that the effects of the spin fluctuations on the edge mode can be detected via the NMR relaxation time measurement. © 2013 American Physical Society.

リンク情報
DOI
https://doi.org/10.1103/PhysRevB.87.165109
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84876189822&origin=inward
ID情報
  • DOI : 10.1103/PhysRevB.87.165109
  • ISSN : 1098-0121
  • ISSN : 1550-235X
  • SCOPUS ID : 84876189822

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