Numerical study of photoinduced dynamics in a double-exchange model

Y. Kanamori, H. Matsueda, and S. Ishihara
Phys. Rev. B 82, 115101 – Published 1 September 2010

Abstract

Photoinduced spin and charge dynamics in double-exchange model are numerically studied. The Lanczos method and the density-matrix renormalization-group method are applied to one-dimensional finite-size clusters. By photon irradiation in a charge-ordered (CO) insulator associated with antiferromagnetic (AFM) correlation, both the CO and AFM correlations collapse rapidly, and appearances of new peaks inside of an insulating gap are observed in the optical spectra and the one-particle excitation spectra. Time evolutions of the spin correlation and the in-gap state are correlated with each other, and are governed by the transfer integral of conduction electrons. Results are interpreted by the charge kink/antikink picture and their effective motions which depend on the localized spin correlation. Pump-photon density dependence of spin and charge dynamics are also studied. Roles of spin degree of freedom are remarkable in a case of weak photon density. Implications of the numerical results for the pump-probe experiments in perovskite manganites are discussed.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
9 More
  • Received 19 April 2010

DOI:https://doi.org/10.1103/PhysRevB.82.115101

©2010 American Physical Society

Authors & Affiliations

Y. Kanamori1, H. Matsueda2, and S. Ishihara1,3

  • 1Department of Physics, Tohoku University, Sendai 980-8578, Japan
  • 2Sendai National College of Technology, Sendai 989-3128, Japan
  • 3Core Research for Evolutional Science and Technology (CREST), Tsukuba 305-0047, Japan

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 82, Iss. 11 — 15 September 2010

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×