Electronic structure of charge- and spin-controlled Sr1-(x+y)Lax+yTi1- xCrxO3

H. Iwasawa, K. Yamakawa, T. Saitoh, J. Inaba, T. Katsufuji, M. Higashiguchi, K. Shimada, H. Namatame, M. Taniguchi

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Abstract

We present the electronic structure of Sr1-(x+y)Lax+yTi1-xCrxO3 investigated by high-resolution photoemission spectroscopy. In the vicinity of the Fermi level, it was found that the electronic structure was composed of a Cr 3d local state with the t2g3 configuration and a Ti 3d itinerant state. The energy levels of these Cr and Ti 3d states are well interpreted by the difference of the charge-transfer energy of both ions. The spectral weight of the Cr 3d state is completely proportional to the spin concentration x irrespective of the carrier concentration y, indicating that the spin density can be controlled by x as desired. In contrast, the spectral weight of the Ti 3d state is not proportional to y, depending on the amount of Cr doping.

Original languageEnglish
Article number067203
JournalPhysical Review Letters
Volume96
Issue number6
DOIs
Publication statusPublished - 2006 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Iwasawa, H., Yamakawa, K., Saitoh, T., Inaba, J., Katsufuji, T., Higashiguchi, M., Shimada, K., Namatame, H., & Taniguchi, M. (2006). Electronic structure of charge- and spin-controlled Sr1-(x+y)Lax+yTi1- xCrxO3. Physical Review Letters, 96(6), [067203]. https://doi.org/10.1103/PhysRevLett.96.067203