Photoemission Measurements of EuB6

Yuji Takakuwa; Shoji Suzuki; Takasi Sagawa

doi:10.7567/JJAPS.17S2.284

Photoemission Measurements of EuB₆

Yuji Takakuwa, Shoji Suzuki, Takasi Sagawa

Micro System Integration Center (μSIC)

Tohoku University

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

13 Citations (Scopus)

Abstract

We have measured the UPS (He II) and XPS (MgKα) of the valence band of EuB₆ in order to determine possible mixing of trivalent Eu³⁺ states with the dominant divalent states As a result, the mixed valence was not found within the experimental error. Aside from the mixed-valence problem, it became clear that the shape and position of Eu²⁺ 4f band in UPS can not be fully explained by the multiplet terms of the final state. It is suggested that the shape and position shift of the 4f band in UPS (He II) might be explained mainly by the self-energy part in the electron-electron interactions between initial- and final-propagators in the many body descriptions of the photoemission process.

Original language	English
Pages (from-to)	284-287
Number of pages	4
Journal	Japanese Journal of Applied Physics
Volume	17
DOIs	https://doi.org/10.7567/JJAPS.17S2.284
Publication status	Published - 1978 Jan

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title = "Photoemission Measurements of EuB6",

abstract = "We have measured the UPS (He II) and XPS (MgKα) of the valence band of EuB6 in order to determine possible mixing of trivalent Eu3+ states with the dominant divalent states As a result, the mixed valence was not found within the experimental error. Aside from the mixed-valence problem, it became clear that the shape and position of Eu2+ 4f band in UPS can not be fully explained by the multiplet terms of the final state. It is suggested that the shape and position shift of the 4f band in UPS (He II) might be explained mainly by the self-energy part in the electron-electron interactions between initial- and final-propagators in the many body descriptions of the photoemission process.",

author = "Yuji Takakuwa and Shoji Suzuki and Takasi Sagawa",

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AB - We have measured the UPS (He II) and XPS (MgKα) of the valence band of EuB6 in order to determine possible mixing of trivalent Eu3+ states with the dominant divalent states As a result, the mixed valence was not found within the experimental error. Aside from the mixed-valence problem, it became clear that the shape and position of Eu2+ 4f band in UPS can not be fully explained by the multiplet terms of the final state. It is suggested that the shape and position shift of the 4f band in UPS (He II) might be explained mainly by the self-energy part in the electron-electron interactions between initial- and final-propagators in the many body descriptions of the photoemission process.

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Photoemission Measurements of EuB₆

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