Skip to main content
placeholder image

Temperature dependent photoexcited carrier dynamics in multiferroic BiFeO3 film: a hidden phase transition

Journal Article


Download full-text (Open Access)

Abstract


  • The ultrafast carrier dynamics of the multiferroic BiFeO3 film in a broad temperature range is investigated using optical pump-probe spectroscopy. The photoexcited electrons release their energy with optical phonons emission through electron-phonon coupling in about 1 ps. The following intermediate process is identified as dynamical spin-lattice coupling in several picoseconds. Furthermore, the peak values of the optical reflectivity and the time constants of carrier relaxation channels show significant changes while the temperature varies from 137.5 K to around 195 K, this aligns with the previously reported hidden phase transition. Our study demonstrates that ultrafast spectroscopy is a sensitive method to look into the dynamical interactions among the on-site high-energy electrons accumulated in the p conduction band of Bi, coherent optical phonon, as well as the spin degree of freedom. These features play crucial roles in the characterization of phase transitions.

UOW Authors


  •   Zhang, Zeyu (external author)
  •   Jin, Zuanming (external author)
  •   Pan, Qunfeng (external author)
  •   Xu, Yue (external author)
  •   Lin, Xian (external author)
  •   Ma, Guohong (external author)
  •   Cheng, Zhenxiang

Publication Date


  • 2014

Citation


  • Zhang, Z., Jin, Z., Pan, Q., Xu, Y., Lin, X., Ma, G. & Cheng, Z. (2014). Temperature dependent photoexcited carrier dynamics in multiferroic BiFeO3 film: a hidden phase transition. Applied Physics Letters, 104 (15), 151902-1-151902-5.

Scopus Eid


  • 2-s2.0-84899627186

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2033&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1032

Has Global Citation Frequency


Start Page


  • 151902-1

End Page


  • 151902-5

Volume


  • 104

Issue


  • 15

Place Of Publication


  • United States

Abstract


  • The ultrafast carrier dynamics of the multiferroic BiFeO3 film in a broad temperature range is investigated using optical pump-probe spectroscopy. The photoexcited electrons release their energy with optical phonons emission through electron-phonon coupling in about 1 ps. The following intermediate process is identified as dynamical spin-lattice coupling in several picoseconds. Furthermore, the peak values of the optical reflectivity and the time constants of carrier relaxation channels show significant changes while the temperature varies from 137.5 K to around 195 K, this aligns with the previously reported hidden phase transition. Our study demonstrates that ultrafast spectroscopy is a sensitive method to look into the dynamical interactions among the on-site high-energy electrons accumulated in the p conduction band of Bi, coherent optical phonon, as well as the spin degree of freedom. These features play crucial roles in the characterization of phase transitions.

UOW Authors


  •   Zhang, Zeyu (external author)
  •   Jin, Zuanming (external author)
  •   Pan, Qunfeng (external author)
  •   Xu, Yue (external author)
  •   Lin, Xian (external author)
  •   Ma, Guohong (external author)
  •   Cheng, Zhenxiang

Publication Date


  • 2014

Citation


  • Zhang, Z., Jin, Z., Pan, Q., Xu, Y., Lin, X., Ma, G. & Cheng, Z. (2014). Temperature dependent photoexcited carrier dynamics in multiferroic BiFeO3 film: a hidden phase transition. Applied Physics Letters, 104 (15), 151902-1-151902-5.

Scopus Eid


  • 2-s2.0-84899627186

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2033&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/1032

Has Global Citation Frequency


Start Page


  • 151902-1

End Page


  • 151902-5

Volume


  • 104

Issue


  • 15

Place Of Publication


  • United States