Local chemical distribution and electronic structure of Ge1−xTx DMS single crystals (T=Cr,Mn, Fe) |
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| Authors: | J.-S. Kang G. Kim S.S. Lee S. Choi S. Cho S.W. Han H.J. Shin B.I. Min |
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| Affiliation: | 1. Department of Physics, The Catholic University of Korea, Puchon 420-743, Republic of Korea;2. CSCMR, Seoul National University, Seoul 151-742, Republic of Korea;3. Department of Physics, University of Ulsan, Ulsan 680-749, Republic of Korea;4. Pohang Accelerator Laboratory, POSTECH, Pohang 790-784, Republic of Korea;5. Department of Physics, POSTECH, Pohang 790-784, Korea |
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| Abstract: | The spatial concentration distribution and local electronic structure of ferromagnetic Ge1−xTx (T=Cr, Mn, Fe) DMS single crystals have been investigated by using scanning photoelectron microscopy (SPEM), X-ray absorption spectroscopy (XAS), and photoemission spectroscopy (PES). It is found that doped T ions in Ge1−xTx crystals are chemically phase-separated, suggesting that the observed ferromagnetism arises from the phase-separated T-rich phases in Ge1−xTx. |
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| Keywords: | 75.50.Pp 68.37.Xy 79.60.&minus i |
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