Determination of s-d exchange coupling in GaMnN by time-resolved Kerr rotation spectroscopy

Wei Ting Hsu*, Ting Yen Hsieh, Hsin Feng Chen, Feng Wen Huang, Po Cheng Chen, Jinn Kong Sheu, Wen-Hao Chang

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

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 N0α=+0.23±0.02eV, indicative of a ferromagnetic s-d exchange coupling in GaMnN. The determined N0α is consistent with the typical value found in most diluted magnetic semiconductors and reveals that GaMnN is indeed not an exception.

Original languageEnglish
Article number125205
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number12
DOIs
StatePublished - 29 Sep 2014

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