Spin-independent and spin-dependent re-excitation in CdZnTe studied by pump-probe spectroscopy

Lihua Teng,Lijun Mu,Xia Wang

doi:10.1016/j.physleta.2019.125851

Spin-independent and spin-dependent re-excitation in CdZnTe studied by pump-probe spectroscopy

Lihua Teng, Lijun Mu + Show 1 more

https://doi.org/10.1016/j.physleta.2019.125851

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Journal: Physics Letters A

Publication Date: Jul 24, 2019

Affiliation: Qingdao University of Science and Technology

#Electron Trapping Time #Defect Density Of States + Show 8 more

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Abstract

Time-resolved pump-probe spectroscopy is used to study the re-excitation processes of spin-balanced and spin-polarized electrons trapped by the defect levels in Cd0.86Zn0.14Te. In CdTe, Cd0.96Zn0.04Te, and Cd0.86Zn0.14Te, the electron trapping time and lifetime decrease with the increasing defect density of states that depends on the Zn composition. The abnormal linearly and circularly polarized pump-probe spectroscopies, respectively, demonstrate the presence of spin-independent and spin-dependent re-excitation processes in Cd0.86Zn0.14Te which have high defect density of states.

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