Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO3 single crystals and thin films

Y. M. Sheu; S. A. Trugman; J. Xiong; Y. S. Park; S. Lee; H. T. Yi; S. W. Cheong; Q. X. Jia; A. J. Taylor; R. P. Prasankumar

doi:10.1051/epjconf/20134103018

Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO₃ single crystals and thin films

Y. M. Sheu
, S. A. Trugman
, J. Xiong
, Y. S. Park
, S. Lee
, H. T. Yi
, S. W. Cheong
, Q. X. Jia
, A. J. Taylor
, R. P. Prasankumar

Department of Materials Design and Innovation

University at Buffalo

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Scopus citations

Abstract

We report a detailed comparison of ultrafast carrier dynamics in single crystals and thin films of multiferroic BiFeO₃ (BFO). Using degenerate femtosecond optical pump-probe spectroscopy, we find that the observed dynamics are qualitatively similar in both samples. After photoexcitation, electrons relax to the conduction band minimum through electron-phonon coupling, with subsequent carrier relaxation proceeding via various recombination pathways that extend to a nanosecond timescale. Subtle differences observed in our measurements indicate that BFO films have a higher band gap than single crystals. Overall, our results demonstrate that carrier relaxation in BFO is analogous to that in bulk semiconductors.

Original language	English
Title of host publication	18th International Conference on Ultrafast Phenomena, UP 2012
DOIs	https://doi.org/10.1051/epjconf/20134103018
State	Published - 2013
Event	18th International Conference on Ultrafast Phenomena, UP 2012 - Lausanne, Switzerland Duration: Jul 8 2012 → Jul 13 2012

Publication series

Name	EPJ Web of Conferences
Volume	41

Conference

Conference	18th International Conference on Ultrafast Phenomena, UP 2012
Country/Territory	Switzerland
City	Lausanne
Period	07/8/12 → 07/13/12

Access to Document

10.1051/epjconf/20134103018

Cite this

Sheu, Y. M., Trugman, S. A., Xiong, J., Park, Y. S., Lee, S., Yi, H. T., Cheong, S. W., Jia, Q. X., Taylor, A. J., & Prasankumar, R. P. (2013). Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO₃ single crystals and thin films. In 18th International Conference on Ultrafast Phenomena, UP 2012 Article 03018 (EPJ Web of Conferences; Vol. 41). https://doi.org/10.1051/epjconf/20134103018

@inproceedings{72af2f60a9f34456af225341b84064a0,

title = "Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO3 single crystals and thin films",

abstract = "We report a detailed comparison of ultrafast carrier dynamics in single crystals and thin films of multiferroic BiFeO3 (BFO). Using degenerate femtosecond optical pump-probe spectroscopy, we find that the observed dynamics are qualitatively similar in both samples. After photoexcitation, electrons relax to the conduction band minimum through electron-phonon coupling, with subsequent carrier relaxation proceeding via various recombination pathways that extend to a nanosecond timescale. Subtle differences observed in our measurements indicate that BFO films have a higher band gap than single crystals. Overall, our results demonstrate that carrier relaxation in BFO is analogous to that in bulk semiconductors.",

author = "Sheu, \{Y. M.\} and Trugman, \{S. A.\} and J. Xiong and Park, \{Y. S.\} and S. Lee and Yi, \{H. T.\} and Cheong, \{S. W.\} and Jia, \{Q. X.\} and Taylor, \{A. J.\} and Prasankumar, \{R. P.\}",

year = "2013",

doi = "10.1051/epjconf/20134103018",

language = "English",

isbn = "9782759809561",

series = "EPJ Web of Conferences",

booktitle = "18th International Conference on Ultrafast Phenomena, UP 2012",

note = "18th International Conference on Ultrafast Phenomena, UP 2012 ; Conference date: 08-07-2012 Through 13-07-2012",

}

Sheu, YM, Trugman, SA, Xiong, J, Park, YS, Lee, S, Yi, HT, Cheong, SW, Jia, QX, Taylor, AJ & Prasankumar, RP 2013, Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO₃ single crystals and thin films. in 18th International Conference on Ultrafast Phenomena, UP 2012., 03018, EPJ Web of Conferences, vol. 41, 18th International Conference on Ultrafast Phenomena, UP 2012, Lausanne, Switzerland, 07/8/12. https://doi.org/10.1051/epjconf/20134103018

Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO₃ single crystals and thin films. / Sheu, Y. M.; Trugman, S. A.; Xiong, J. et al.
18th International Conference on Ultrafast Phenomena, UP 2012. 2013. 03018 (EPJ Web of Conferences; Vol. 41).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO3 single crystals and thin films

AU - Sheu, Y. M.

AU - Trugman, S. A.

AU - Xiong, J.

AU - Park, Y. S.

AU - Lee, S.

AU - Yi, H. T.

AU - Cheong, S. W.

AU - Jia, Q. X.

AU - Taylor, A. J.

AU - Prasankumar, R. P.

PY - 2013

Y1 - 2013

N2 - We report a detailed comparison of ultrafast carrier dynamics in single crystals and thin films of multiferroic BiFeO3 (BFO). Using degenerate femtosecond optical pump-probe spectroscopy, we find that the observed dynamics are qualitatively similar in both samples. After photoexcitation, electrons relax to the conduction band minimum through electron-phonon coupling, with subsequent carrier relaxation proceeding via various recombination pathways that extend to a nanosecond timescale. Subtle differences observed in our measurements indicate that BFO films have a higher band gap than single crystals. Overall, our results demonstrate that carrier relaxation in BFO is analogous to that in bulk semiconductors.

AB - We report a detailed comparison of ultrafast carrier dynamics in single crystals and thin films of multiferroic BiFeO3 (BFO). Using degenerate femtosecond optical pump-probe spectroscopy, we find that the observed dynamics are qualitatively similar in both samples. After photoexcitation, electrons relax to the conduction band minimum through electron-phonon coupling, with subsequent carrier relaxation proceeding via various recombination pathways that extend to a nanosecond timescale. Subtle differences observed in our measurements indicate that BFO films have a higher band gap than single crystals. Overall, our results demonstrate that carrier relaxation in BFO is analogous to that in bulk semiconductors.

UR - https://www.scopus.com/pages/publications/84875638854

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DO - 10.1051/epjconf/20134103018

M3 - Conference contribution

SN - 9782759809561

T3 - EPJ Web of Conferences

BT - 18th International Conference on Ultrafast Phenomena, UP 2012

T2 - 18th International Conference on Ultrafast Phenomena, UP 2012

Y2 - 8 July 2012 through 13 July 2012

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