Journal of East China Normal University(Natural Science) >

2021 , Vol. 2021 >Issue 1: 92 - 102

DOI: https://doi.org/10.3969/j.issn.1000-5641.202022005

Physics and Electronics

Electron spin coherence dynamics in CdS crystals

  • Jiaxing GUO ,
  • Zhen WU ,
  • Pan LIANG ,
  • Meizhen JIANG ,
  • Rongrong HU ,
  • Yuanyuan ZHANG ,
  • Donghai FENG
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  • 1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai　200241, China
    2. College of Arts and Sciences, Shanghai Dianji University, Shanghai　201306, China
    3. Colloge of Sciences, Shanghai Institute of Technology, Shanghai　200235, China

Received date: 2020-03-14

  Online published: 2021-01-28

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Abstract

In this paper, we use time-resolved Kerr rotation(TRKR) spectroscopy to study the electron spin coherence dynamics of a wurtzite (0001) plane n-CdS single crystal at different temperatures and wavelengths. Two types of electronic spin signals are observed in this material at low temperatures. One is a long-lived spin signal at relatively long pump probe wavelengths, where the spin dephasing time exceeds 4.8 ns at 5 K and decreases with increasing temperature. The other is a short-lived spin signal at relatively short pump probe wavelengths, where the spin dephasing time is about 40 ps and persists up to room temperature; in this case, the spin signal is largely independent of temperature. Studies have shown that long-lived spin signals can be attributed to localized electrons, while short-lived spin signals can be attributed to conduction delocalized electrons.

Key words： electron spin; CdS; single crystal; pump-probe

Cite this article

Jiaxing GUO , Zhen WU , Pan LIANG , Meizhen JIANG , Rongrong HU , Yuanyuan ZHANG , Donghai FENG . Electron spin coherence dynamics in CdS crystals[J]. Journal of East China Normal University(Natural Science), 2021 , 2021(1) : 92 -102 . DOI: 10.3969/j.issn.1000-5641.202022005

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