Strain dependent ultrafast carrier dynamics in EuTiO3 films

Zhong Guo Li; Run Zhao; Weiwei Li; Haiyan Wang; Hao Yang; Ying Lin Song

doi:10.1063/1.4898787

Strain dependent ultrafast carrier dynamics in EuTiO₃ films

Zhong Guo Li
, Run Zhao
, Weiwei Li
, Haiyan Wang
, Hao Yang^*
, Ying Lin Song

^*Corresponding author for this work

School of Physics

Harbin Institute of Technology
Soochow University
Texas A&M University

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

The photocarrier relaxation dynamics of EuTiO₃ films have been investigated using femtosecond transient absorption spectroscopy. Two kinds of EuTiO₃ films, with and without strain, have been included. In both films, the decay dynamics of 2p-3d_t2g transition has a fast (∼2 ps) and slow (ns) components which are independent of the strain. Remarkably, the transient photobleaching of 4f-3d_t2g transition is found to be enhanced considerably in the strained film, accompanied with a subnanosecond carrier lifetime. This behavior can be linked to the strain induced band structure modulation. Our results reveal the dynamical interactions in EuTiO₃, identifying the critical roles of strain in photo induced phenomena.

Original language	English
Article number	162904
Journal	Applied Physics Letters
Volume	105
Issue number	16
DOIs	https://doi.org/10.1063/1.4898787
State	Published - 20 Oct 2014

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title = "Strain dependent ultrafast carrier dynamics in EuTiO3 films",

abstract = "The photocarrier relaxation dynamics of EuTiO3 films have been investigated using femtosecond transient absorption spectroscopy. Two kinds of EuTiO3 films, with and without strain, have been included. In both films, the decay dynamics of 2p-3dt2g transition has a fast (∼2 ps) and slow (ns) components which are independent of the strain. Remarkably, the transient photobleaching of 4f-3dt2g transition is found to be enhanced considerably in the strained film, accompanied with a subnanosecond carrier lifetime. This behavior can be linked to the strain induced band structure modulation. Our results reveal the dynamical interactions in EuTiO3, identifying the critical roles of strain in photo induced phenomena.",

author = "Li, \{Zhong Guo\} and Run Zhao and Weiwei Li and Haiyan Wang and Hao Yang and Song, \{Ying Lin\}",

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doi = "10.1063/1.4898787",

language = "英语",

volume = "105",

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T1 - Strain dependent ultrafast carrier dynamics in EuTiO3 films

AU - Li, Zhong Guo

AU - Zhao, Run

AU - Li, Weiwei

AU - Wang, Haiyan

AU - Yang, Hao

AU - Song, Ying Lin

PY - 2014/10/20

Y1 - 2014/10/20

N2 - The photocarrier relaxation dynamics of EuTiO3 films have been investigated using femtosecond transient absorption spectroscopy. Two kinds of EuTiO3 films, with and without strain, have been included. In both films, the decay dynamics of 2p-3dt2g transition has a fast (∼2 ps) and slow (ns) components which are independent of the strain. Remarkably, the transient photobleaching of 4f-3dt2g transition is found to be enhanced considerably in the strained film, accompanied with a subnanosecond carrier lifetime. This behavior can be linked to the strain induced band structure modulation. Our results reveal the dynamical interactions in EuTiO3, identifying the critical roles of strain in photo induced phenomena.

AB - The photocarrier relaxation dynamics of EuTiO3 films have been investigated using femtosecond transient absorption spectroscopy. Two kinds of EuTiO3 films, with and without strain, have been included. In both films, the decay dynamics of 2p-3dt2g transition has a fast (∼2 ps) and slow (ns) components which are independent of the strain. Remarkably, the transient photobleaching of 4f-3dt2g transition is found to be enhanced considerably in the strained film, accompanied with a subnanosecond carrier lifetime. This behavior can be linked to the strain induced band structure modulation. Our results reveal the dynamical interactions in EuTiO3, identifying the critical roles of strain in photo induced phenomena.

UR - https://www.scopus.com/pages/publications/84908191237

U2 - 10.1063/1.4898787

DO - 10.1063/1.4898787

M3 - 文章

AN - SCOPUS:84908191237

SN - 0003-6951

VL - 105

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 16

M1 - 162904

ER -

Strain dependent ultrafast carrier dynamics in EuTiO₃ films

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