Local electronic structure of Cr in the II-VI diluted ferromagnetic semiconductor Zn$_{1-x}$Cr$_x$Te

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dc.creatorKobayashi, M.
dc.creatorIshida, Y.
dc.creatorHwang, J. I.
dc.creatorSong, G. S.
dc.creatorFujimori, A.
dc.creatorYang, C. -S.
dc.creatorLee, L.
dc.creatorLin, H. -J.
dc.creatorHuang, D. -J.
dc.creatorChen, C. T.
dc.creatorTakeda, Y.
dc.creatorFujimori, S. -I.
dc.creatorOkane, T.
dc.creatorSaitoh, Y.
dc.creatorYamagami, H.
dc.creatorKobayashi, K.
dc.creatorTanaka, A.
dc.creatorSaito, H.
dc.creatorAndo, K.
dc.date2008-04-21
dc.date.accessioned2026-07-07T09:41:43Z
dc.date.available2026-07-07T09:41:43Z
dc.descriptionThe electronic structure of the Cr ions in the diluted ferromagnetic semiconductor Zn$_{1-x}$Cr$_x$Te ($x=0.03$ and 0.15) thin films has been investigated using x-ray magnetic circular dichroism (XMCD) and photoemission spectroscopy (PES). Magnetic-field ($H$) and temperature ($T$) dependences of the Cr $2p$ XMCD spectra well correspond to the magnetization measured by a SQUID magnetometer. The line shape of the Cr $2p$ XMCD spectra is independent of $H$, $T$, and $x$, indicating that the ferromagnetism is originated from the same electronic states of the Cr ion. Cluster-model analysis indicates that although there are two or more kinds of Cr ions in the Zn$_{1-x}$Cr$_x$Te samples, the ferromagnetic XMCD signal is originated from Cr ions substituted for the Zn site. The Cr 3d partial density of states extracted using Cr $2p \to 3d$ resonant PES shows a broad feature near the top of the valence band, suggesting strong $s$,$p$-$d$ hybridization. No density of states is detected at the Fermi level, consistent with their insulating behavior. Based on these findings, we conclude that double exchange mechanism cannot explain the ferromagnetism in Zn$_{1-x}$Cr$_{x}$Te.
dc.descriptionAccepted for New Journal of Physics. Single column, 21 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/0804.3272
dc.identifierhttp://arxiv.org/abs/0804.3272
dc.identifierNew J. Phys. 10, 055011 (2008)
dc.identifierdoi:10.1088/1367-2630/10/5/055011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/161928
dc.subjectMaterials Science
dc.subjectStrongly Correlated Electrons
dc.titleLocal electronic structure of Cr in the II-VI diluted ferromagnetic semiconductor Zn$_{1-x}$Cr$_x$Te
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