High-energy resolution photoemission study of CsxC60. Comparative study with KxC60

T. Takahashi; T. Morimoto; T. Yokoya

doi:10.1016/0921-4534(94)90780-3

High-energy resolution photoemission study of Cs_xC₆₀. Comparative study with K_xC₆₀

T. Takahashi, T. Morimoto, T. Yokoya

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

8 Citations (Scopus)

Abstract

Comparative high-energy resolution (ΔE ∼ 30 meV) photoemission spectroscopy has been performed for Cs_xC₆₀ and K_xC₆₀ to study the difference and similarity in the electronic structure near the Fermi level (E_F) between the superconducting and the non-superconducting alkali-doped C₆₀. It was found that Cs_xC₆₀ (0≤x≤6) is a semiconductor or an insulator in the whole composition range except for 0<x≤1 where the Cs doped C₆₀ appears to be metallic with a finite density of states at E_F. This shows a sharp contrast with the case of K_xC₆₀ which exhibits a relatively large density of states at E_F in the composition of 0<x<4 with the largest intensity around x = 3.

Original language	English
Pages (from-to)	227-232
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	232
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(94)90780-3
Publication status	Published - Nov 1 1994
Externally published	Yes

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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10.1016/0921-4534(94)90780-3

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title = "High-energy resolution photoemission study of CsxC60. Comparative study with KxC60",

abstract = "Comparative high-energy resolution (ΔE ∼ 30 meV) photoemission spectroscopy has been performed for CsxC60 and KxC60 to study the difference and similarity in the electronic structure near the Fermi level (EF) between the superconducting and the non-superconducting alkali-doped C60. It was found that CsxC60 (0≤x≤6) is a semiconductor or an insulator in the whole composition range except for 060 appears to be metallic with a finite density of states at EF. This shows a sharp contrast with the case of KxC60 which exhibits a relatively large density of states at EF in the composition of 0",

author = "T. Takahashi and T. Morimoto and T. Yokoya",

note = "Funding Information: The authors thank Y. Achiba, Tokyo Metropolitan University, for providing high-purity C6o powders. They also thank Y. Iwasa, JAIST at Hokuriku, S. Saito, Tokyo Institute of Technology, and H. Katay-ama-Yoshida, Tohoku University, for their useful discussions. This work was supported by a grant from the Ministry of Education, Culture and Science of Japan.",

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doi = "10.1016/0921-4534(94)90780-3",

language = "English",

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AU - Takahashi, T.

AU - Morimoto, T.

AU - Yokoya, T.

N1 - Funding Information: The authors thank Y. Achiba, Tokyo Metropolitan University, for providing high-purity C6o powders. They also thank Y. Iwasa, JAIST at Hokuriku, S. Saito, Tokyo Institute of Technology, and H. Katay-ama-Yoshida, Tohoku University, for their useful discussions. This work was supported by a grant from the Ministry of Education, Culture and Science of Japan.

PY - 1994/11/1

Y1 - 1994/11/1

N2 - Comparative high-energy resolution (ΔE ∼ 30 meV) photoemission spectroscopy has been performed for CsxC60 and KxC60 to study the difference and similarity in the electronic structure near the Fermi level (EF) between the superconducting and the non-superconducting alkali-doped C60. It was found that CsxC60 (0≤x≤6) is a semiconductor or an insulator in the whole composition range except for 060 appears to be metallic with a finite density of states at EF. This shows a sharp contrast with the case of KxC60 which exhibits a relatively large density of states at EF in the composition of 0

AB - Comparative high-energy resolution (ΔE ∼ 30 meV) photoemission spectroscopy has been performed for CsxC60 and KxC60 to study the difference and similarity in the electronic structure near the Fermi level (EF) between the superconducting and the non-superconducting alkali-doped C60. It was found that CsxC60 (0≤x≤6) is a semiconductor or an insulator in the whole composition range except for 060 appears to be metallic with a finite density of states at EF. This shows a sharp contrast with the case of KxC60 which exhibits a relatively large density of states at EF in the composition of 0

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High-energy resolution photoemission study of Cs_xC₆₀. Comparative study with K_xC₆₀

Abstract

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