Kondo-like mass enhancement of Dirac fermions in Ba(Fe 1 - X Mn x As) 2

T. Urata, Y. Tanabe, K. K. Huynh, H. Oguro, K. Watanabe, S. Heguri, K. Tanigaki

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The effect of Mn substitution, acting as a magnetic impurity for Fe, on the Dirac cone was investigated in Ba(Fe1-xMnxAs)2. Both magnetoresistance and Hall resistivity studies clearly indicate that the cyclotron effective mass (m*) of the Dirac cone is anomalously enhanced at low temperatures by the impurity, although its evolution as a function of carrier number proceeds in a conventional manner at higher temperatures. Kondo-like band renormalization induced by the magnetic impurity scattering is suggested as the most plausible explanation for this, and the anomalous mass enhancement of the Dirac fermions is discussed.

Original languageEnglish
Article number024503
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number2
DOIs
Publication statusPublished - 2014 Jan 13

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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