TY - JOUR
T1 - Independent control of charge and spin density in Sr1 - (x + y) Lax + y Ti1 - x Crx O3 probed by photoemission spectroscopy
AU - Kaneyoshi, S.
AU - Iwasawa, H.
AU - Saitoh, T.
AU - Aiura, Y.
AU - Satoh, D.
AU - Katsufuji, T.
AU - Hase, I.
AU - Higashiguchi, M.
AU - Shimada, K.
AU - Namatame, H.
AU - Taniguchi, M.
AU - Kubota, M.
AU - Ono, K.
PY - 2007/3/1
Y1 - 2007/3/1
N2 - Using photoemission (PES) spectroscopy and a first-principles band-structure calculation, we have investigated the electronic structure of perovskite-type Ti-Cr oxides Sr1 - (x + y) Lax + y Ti1 - x Crx O3, in which the charge and spin density can be controlled. It was found that the near-Fermi level (EF) electronic structure consisted of a Cr 3d localized state and a Ti 3d itinerant state that were well separated in energy. The spectral weight of the Cr 3d state was proportional to x, demonstrating a controllable spin density. In contrast, the near-EF spectral weight exhibited different behavior. The band theory has reproduced the essential features of the Cr and Ti 3d states as well as the O 2p ones, but failed to predict the location of the Cr 3d and O 2p states. Implications of this discrepancy have been discussed in connection with calculated magnetic moments.
AB - Using photoemission (PES) spectroscopy and a first-principles band-structure calculation, we have investigated the electronic structure of perovskite-type Ti-Cr oxides Sr1 - (x + y) Lax + y Ti1 - x Crx O3, in which the charge and spin density can be controlled. It was found that the near-Fermi level (EF) electronic structure consisted of a Cr 3d localized state and a Ti 3d itinerant state that were well separated in energy. The spectral weight of the Cr 3d state was proportional to x, demonstrating a controllable spin density. In contrast, the near-EF spectral weight exhibited different behavior. The band theory has reproduced the essential features of the Cr and Ti 3d states as well as the O 2p ones, but failed to predict the location of the Cr 3d and O 2p states. Implications of this discrepancy have been discussed in connection with calculated magnetic moments.
KW - Electronic structure
KW - Photoemission spectroscopy
KW - SrTiO
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U2 - 10.1016/j.jmmm.2006.10.400
DO - 10.1016/j.jmmm.2006.10.400
M3 - Article
AN - SCOPUS:33847311859
VL - 310
SP - e278-e280
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - 2 SUPPL. PART 2
ER -