Action spectra of the two-stage photoinduced insulator-metal transition in Pr1-xCaxMnO3

M. Fiebig, K. Miyano, Takuya Satoh, Y. Tomioka, Y. Tokura

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The action spectra for the photoinduced insulator-metal transition in Pr1-xCaxMnO3 were investigated in the 0.45-3.05eV range. The photon-density threshold for the transition exhibits a gaplike behavior a∼0.4eV with anisotropic features, and it is insensitive to the degree of carrier doping x. A two-stage mechanism is proposed for the transition. In the first stage, photoexcited charge carriers melt down the charge-ordered state by screening effects, which is followed by a local formation of metastable metallic domains. In the second stage, the barrier between the metallic domains is overcome by an applied electric field resulting in a continuous conducting path that remains stable as long as the current is maintained.

Original languageEnglish
Pages (from-to)7944-7949
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number11
DOIs
Publication statusPublished - Jan 1 1999
Externally publishedYes

Fingerprint

Metal insulator transition
Charge carriers
Screening
Photons
transition metals
Electric fields
Doping (additives)
insulators
photon density
charge carriers
screening
conduction
thresholds
electric fields

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Action spectra of the two-stage photoinduced insulator-metal transition in Pr1-xCaxMnO3 . / Fiebig, M.; Miyano, K.; Satoh, Takuya; Tomioka, Y.; Tokura, Y.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 60, No. 11, 01.01.1999, p. 7944-7949.

Research output: Contribution to journalArticle

Fiebig, M. ; Miyano, K. ; Satoh, Takuya ; Tomioka, Y. ; Tokura, Y. / Action spectra of the two-stage photoinduced insulator-metal transition in Pr1-xCaxMnO3 In: Physical Review B - Condensed Matter and Materials Physics. 1999 ; Vol. 60, No. 11. pp. 7944-7949.
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