Interplay between magnetic impurities and photoinduced carriers in surface depletion layer of anatase Ti1-x Cox O2-δ thin film probed by x-ray photoemission spectroscopy

N. Yamashita; T. Sudayama; T. Mizokawa; Y. Yamada; T. Fukumura; M. Kawasaki

doi:10.1063/1.3291680

Interplay between magnetic impurities and photoinduced carriers in surface depletion layer of anatase Ti_1-x Co_x O_2-δ thin film probed by x-ray photoemission spectroscopy

N. Yamashita, T. Sudayama, T. Mizokawa, Y. Yamada, T. Fukumura, M. Kawasaki

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

X-ray photoemission spectroscopy measurements with ultraviolet laser illumination have been performed for anatase Ti_1-x Co_x O_2-δ thin films with x=0.05 and 0.10 in order to investigate the interplay between the Co spins and the photoinduced carriers in the surface region. We have found that the surface band bending is removed by the ultraviolet illumination, indicating that photoinduced carriers are injected into the surface depletion layer. After the carrier injection, the position of the chemical potential is governed by the exchange splitting of the Ti ^3d conduction band due to the magnetic interaction between the photoinduced carriers and the Co spins.

Original language	English
Article number	021907
Journal	Applied Physics Letters
Volume	96
Issue number	2
DOIs	https://doi.org/10.1063/1.3291680
Publication status	Published - 2010

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Interplay between magnetic impurities and photoinduced carriers in surface depletion layer of anatase Ti1-x Cox O2-δ thin film probed by x-ray photoemission spectroscopy",

abstract = "X-ray photoemission spectroscopy measurements with ultraviolet laser illumination have been performed for anatase Ti1-x Cox O2-δ thin films with x=0.05 and 0.10 in order to investigate the interplay between the Co spins and the photoinduced carriers in the surface region. We have found that the surface band bending is removed by the ultraviolet illumination, indicating that photoinduced carriers are injected into the surface depletion layer. After the carrier injection, the position of the chemical potential is governed by the exchange splitting of the Ti 3d conduction band due to the magnetic interaction between the photoinduced carriers and the Co spins.",

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T1 - Interplay between magnetic impurities and photoinduced carriers in surface depletion layer of anatase Ti1-x Cox O2-δ thin film probed by x-ray photoemission spectroscopy

AU - Yamashita, N.

AU - Sudayama, T.

AU - Mizokawa, T.

AU - Yamada, Y.

AU - Fukumura, T.

AU - Kawasaki, M.

PY - 2010

Y1 - 2010

N2 - X-ray photoemission spectroscopy measurements with ultraviolet laser illumination have been performed for anatase Ti1-x Cox O2-δ thin films with x=0.05 and 0.10 in order to investigate the interplay between the Co spins and the photoinduced carriers in the surface region. We have found that the surface band bending is removed by the ultraviolet illumination, indicating that photoinduced carriers are injected into the surface depletion layer. After the carrier injection, the position of the chemical potential is governed by the exchange splitting of the Ti 3d conduction band due to the magnetic interaction between the photoinduced carriers and the Co spins.

AB - X-ray photoemission spectroscopy measurements with ultraviolet laser illumination have been performed for anatase Ti1-x Cox O2-δ thin films with x=0.05 and 0.10 in order to investigate the interplay between the Co spins and the photoinduced carriers in the surface region. We have found that the surface band bending is removed by the ultraviolet illumination, indicating that photoinduced carriers are injected into the surface depletion layer. After the carrier injection, the position of the chemical potential is governed by the exchange splitting of the Ti 3d conduction band due to the magnetic interaction between the photoinduced carriers and the Co spins.

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Interplay between magnetic impurities and photoinduced carriers in surface depletion layer of anatase Ti_1-x Co_x O_2-δ thin film probed by x-ray photoemission spectroscopy

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