標題: Determination of s-d exchange coupling in GaMnN by time-resolved Kerr rotation spectroscopy
作者: Hsu, Wei-Ting
Hsieh, Ting-Yen
Chen, Hsin-Feng
Huang, Feng-Wen
Chen, Po-Cheng
Sheu, Jinn-Kong
Chang, Wen-Hao
電子物理學系
Department of Electrophysics
公開日期: 29-Sep-2014
摘要: Coherent electron-spin dynamics in Ga1-xMnxN has been investigated by time-resolved Kerr rotation spectroscopy. The effective electron g factor shows a linear increase with the Mn concentration due to the s-d exchange coupling between the conduction electrons and the d-shell electrons of Mn3+ impurities. The magnitude and sign of the s-d exchange constant are determined precisely to be N-0 alpha = +0.23 +/- 0.02 eV, indicative of a ferromagnetic s-d exchange coupling in GaMnN. The determined N-0 alpha is consistent with the typical value found in most diluted magnetic semiconductors and reveals that GaMnN is indeed not an exception.
URI: http://dx.doi.org/10.1103/PhysRevB.90.125205
http://hdl.handle.net/11536/25369
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.90.125205
期刊: PHYSICAL REVIEW B
Volume: 90
Issue: 12
起始頁: 0
結束頁: 0
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