Novel excitation-density dependence in strongly spin-charge coupled system

J. Ohara, Y. Kanamori, S. Ishihara

Research output: Contribution to journalArticle

Abstract

Photoinduced spin-charge dynamics in strongly correlated electron systems is studied based on an extended double-exchange model. Solving a time-dependent Schrödinger equation with the Lanczos method, we trace the process of photoinduced melting of an antiferromagnetic charge order and analyze the excitation-density dependence on that. In the case of low density photoexcitation, both charge and spin orders are melted by photocarrier doping. This is interpreted with a conventional double-exchange mechanism. In the case of high density photoexcitation, however, the charge order is melted. The antiferromagnetic spin order is transiently weakened but after turnoff of the photoirradiation it recovers. This phenomenon strikingly differs from the weak photoexcitation case.

Original languageEnglish
Pages (from-to)355-358
Number of pages4
JournalActa Physica Polonica A
Volume121
Issue number2
DOIs
Publication statusPublished - 2012 Feb

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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