Electronic states of core levels and valence bands for KxC60 studied by X-ray photoelectron spectroscopy

Y. Fukuda; N. Sanada; M. Nagoshi; T. Takahashi; H. Katayama-Yoshida; K. Kikuchi; S. Suzuki; I. Ikemoto; Y. Achiba; Y. Syono; M. Tachiki

doi:10.1016/0921-4534(91)90117-H

Electronic states of core levels and valence bands for K_xC₆₀ studied by X-ray photoelectron spectroscopy

Y. Fukuda, N. Sanada, M. Nagoshi, T. Takahashi, H. Katayama-Yoshida, K. Kikuchi, S. Suzuki, I. Ikemoto, Y. Achiba, Y. Syono, M. Tachiki

Advanced Institute for Materials Research (AIMR)

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

8 Citations (Scopus)

Abstract

Electronic states of K 2p and C 1s core levels and valence bands for K_χC₆₀ (χ=0≈6.3) have been studied by X-ray photoelectron spectroscopy (XPS). We find two different chemical states of potassium with binding energy 293.8 and 294.9 eV. The K 2p_{3 2} line becomes a single peak at χ = 6.3. These results are discussed in terms of the sites occupied by K in K_χC₆₀. The C 1s line (285.1 eV) for C₆₀ is shifted by 0.3 eV to the side of higher binding energy by a very small amount of K, which is consistent with the shift of the valence band. The other line at 284.4 eV appears at 10 min evaporation (χ = 0.8). The intensity of the former is reduced and that of the latter increases with the evaporation time.

Original language	English
Pages (from-to)	320-324
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	181
Issue number	4-6
DOIs	https://doi.org/10.1016/0921-4534(91)90117-H
Publication status	Published - 1991 Oct 10

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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Fukuda, Y., Sanada, N., Nagoshi, M., Takahashi, T., Katayama-Yoshida, H., Kikuchi, K., Suzuki, S., Ikemoto, I., Achiba, Y., Syono, Y., & Tachiki, M. (1991). Electronic states of core levels and valence bands for K_xC₆₀ studied by X-ray photoelectron spectroscopy. Physica C: Superconductivity and its applications, 181(4-6), 320-324. https://doi.org/10.1016/0921-4534(91)90117-H

Electronic states of core levels and valence bands for K_xC₆₀ studied by X-ray photoelectron spectroscopy. / Fukuda, Y.; Sanada, N.; Nagoshi, M.; Takahashi, T.; Katayama-Yoshida, H.; Kikuchi, K.; Suzuki, S.; Ikemoto, I.; Achiba, Y.; Syono, Y.; Tachiki, M.

In: Physica C: Superconductivity and its applications, Vol. 181, No. 4-6, 10.10.1991, p. 320-324.

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

Fukuda, Y, Sanada, N, Nagoshi, M, Takahashi, T, Katayama-Yoshida, H, Kikuchi, K, Suzuki, S, Ikemoto, I, Achiba, Y, Syono, Y & Tachiki, M 1991, 'Electronic states of core levels and valence bands for K_xC₆₀ studied by X-ray photoelectron spectroscopy', Physica C: Superconductivity and its applications, vol. 181, no. 4-6, pp. 320-324. https://doi.org/10.1016/0921-4534(91)90117-H

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title = "Electronic states of core levels and valence bands for KxC60 studied by X-ray photoelectron spectroscopy",

abstract = "Electronic states of K 2p and C 1s core levels and valence bands for KχC60 (χ=0≈6.3) have been studied by X-ray photoelectron spectroscopy (XPS). We find two different chemical states of potassium with binding energy 293.8 and 294.9 eV. The K 2p 3 2 line becomes a single peak at χ = 6.3. These results are discussed in terms of the sites occupied by K in KχC60. The C 1s line (285.1 eV) for C60 is shifted by 0.3 eV to the side of higher binding energy by a very small amount of K, which is consistent with the shift of the valence band. The other line at 284.4 eV appears at 10 min evaporation (χ = 0.8). The intensity of the former is reduced and that of the latter increases with the evaporation time.",

author = "Y. Fukuda and N. Sanada and M. Nagoshi and T. Takahashi and H. Katayama-Yoshida and K. Kikuchi and S. Suzuki and I. Ikemoto and Y. Achiba and Y. Syono and M. Tachiki",

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T1 - Electronic states of core levels and valence bands for KxC60 studied by X-ray photoelectron spectroscopy

AU - Fukuda, Y.

AU - Sanada, N.

AU - Nagoshi, M.

AU - Takahashi, T.

AU - Katayama-Yoshida, H.

AU - Kikuchi, K.

AU - Suzuki, S.

AU - Ikemoto, I.

AU - Achiba, Y.

AU - Syono, Y.

AU - Tachiki, M.

PY - 1991/10/10

Y1 - 1991/10/10

N2 - Electronic states of K 2p and C 1s core levels and valence bands for KχC60 (χ=0≈6.3) have been studied by X-ray photoelectron spectroscopy (XPS). We find two different chemical states of potassium with binding energy 293.8 and 294.9 eV. The K 2p 3 2 line becomes a single peak at χ = 6.3. These results are discussed in terms of the sites occupied by K in KχC60. The C 1s line (285.1 eV) for C60 is shifted by 0.3 eV to the side of higher binding energy by a very small amount of K, which is consistent with the shift of the valence band. The other line at 284.4 eV appears at 10 min evaporation (χ = 0.8). The intensity of the former is reduced and that of the latter increases with the evaporation time.

AB - Electronic states of K 2p and C 1s core levels and valence bands for KχC60 (χ=0≈6.3) have been studied by X-ray photoelectron spectroscopy (XPS). We find two different chemical states of potassium with binding energy 293.8 and 294.9 eV. The K 2p 3 2 line becomes a single peak at χ = 6.3. These results are discussed in terms of the sites occupied by K in KχC60. The C 1s line (285.1 eV) for C60 is shifted by 0.3 eV to the side of higher binding energy by a very small amount of K, which is consistent with the shift of the valence band. The other line at 284.4 eV appears at 10 min evaporation (χ = 0.8). The intensity of the former is reduced and that of the latter increases with the evaporation time.

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