Effects of magnetic fields on free excitons in CuInSe 2

Effects of magnetic fields on free excitons in CuInSe 2
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磁场对 CuInSe 2 中自由激子的影响

DOI:
10.1002/pssc.200881149
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发表时间:
2009
期刊:
physica status solidi c
影响因子:
--
通讯作者:
Yakushev M
Yakushev M
中科院分区:
--
文献类型:
--
作者:
Yakushev M

文献摘要

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使用 4.2 K 下的光致发光 (PL) 研究了高达 20 T 的磁场对 CuInSe2 单晶的影响。在磁场下 4.2 K 下 CuInSe2 的 PL 光谱中测量的游离 A 和 Be 激子的抗磁位移用于估计还原质量(A 激子为 0.095m0,B 激子为 0.098m0)、结合能 CuInSe2 中自由激子的玻尔半径(A 为 7.0 meV,B 激子为 7.2 meV)和玻尔半径(A 为 7.6 nm,B 激子为 7.3 nm),假设两个激子都是各向同性且类氢。 (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA,魏因海姆)
The effects of magnetic fields up to 20 T were studied in CuInSe2single crystals using photoluminescence (PL) at 4.2 K. Diamagnetic shifts of the freeAandBexcitons measured in the PL spectra in CuInSe2at 4.2 K under the magnetic fields were used to estimate the reduced masses (0.095m0for the A and 0.098m0for the B exciton), binding energies (7.0 meV for the A and 7.2 meV for the B exciton) and Bohr radii (7.6 nm for the A and 7.3 nm for the B exciton) of the free‐excitons in CuInSe2assuming that both excitons are isotropic and hydrogen‐like. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)