Optical Absorption of Co2+ in AgIn5S8 and CuIn5S8 Spinel Crystals

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概要

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• The optical absorption spectra of cobalt-doped AgIn5S8 and CuIn5S8 single crystals grown by a chemical transport reaction method were investigated at 7 K. The absorption peaks due to the Co2+ impurities are well explained in terms of the $T_{d}$ crystal field and the second-order spin-orbit coupling effect. The values of $Dq$ and $B$ calculated from the observed spectra show that the $d$ electron delocalization is slightly larger in the host crystal CuIn5S8 than in AgIn5S8. This may be caused by the shorter tetrahedral bond length of Co–S in CuIn5S8:Co2+ than in AgIn5S8:Co2+.

• 2003-06-15

著者

• Lee Seok-joo

  Department Of Physics Korea Advanced Institute Of Science And Technology

• Park Hae

  Department Of Neuropsychiatry Seoul National University Hospital

• Kim Jae-eun

  Department Of Physics Korea Advanced Institue Of Science And Technology

• Park Hae

  Department of Physics, Korea Advanced Institute of Science and Technology, Guseong-dong 373-1, Yuseong-gu, Daejeon 305-701, Korea

• Lee Seok-Joo

  Department of Physics, Korea Advanced Institute of Science and Technology, Guseong-dong 373-1, Yuseong-gu, Daejeon 305-701, Korea

• Park Hae

  Department of Metallurgical Engineering, Yonsei University, Seodamoon, Shinchon 134, Seoul 120-749, Korea

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