Optical probe of anisotropic and incoherent charge dynamics in a layered ferromagnet

T. Ishikawa, T. Kimura, T. Katsufuji, Y. Tokura

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Highly anisotropic optical conductivity spectra and their temperature variation have been investigated for a layered ferromagnetic (Formula presented)=121 K) crystal of La(Formula presented)Sr(Formula presented)Mn(Formula presented)O(Formula presented)=0.4). The in-plane spectra show conspicuous spectral-weight transfer over an energy region of 0-3 eV with evolution of spin polarization below (Formula presented) and in the ferromagnetic, highly conducting ground state form a prominent peak structure around 0.4 eV with minimal Drude weight. By contrast, the (Formula presented)-axis spectra show little change with temperature and remain insulatorlike. The results indicate highly incoherent dynamics of the fully quasi-two dimensional spin-polarized carriers.

Original languageEnglish
Pages (from-to)R8079-R8082
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume57
Issue number14
DOIs
Publication statusPublished - 1998 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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