Electron-energy-loss spectroscopy studies of icosahedral-phase plasmons

L. E. Levine; P. C. Gibbons; K. F. Kelton

doi:10.1103/PhysRevB.40.9338

Electron-energy-loss spectroscopy studies of icosahedral-phase plasmons

L. E. Levine, P. C. Gibbons, K. F. Kelton

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Abstract

Previous electron-energy-loss spectroscopy (EELS) measurements on amorphous and icosahedral (i-phase) Al6Mn show a broader plasmon excitation in the i-phase than in the amorphous phase [Chen et al., Phys. Rev. Lett. 57, 743 (1986)]. This broadening is presumed to arise from differences between the electronic structures of the phases. We present measurements on i-phase Al6Mn that confirm these earlier results. We also present measurements that show plasmon widths that are similar in i-phase and amorphous Pd58.8U20.6Si20.6, and in i-phase and amorphous Al75Cu15V10. Thus, the additional broadening in i-phase Al6Mn is not a general feature of the icosahedral phase. The phase independence of plasmon widths in Pd58.8U20.6Si20.6 and Al75Cu15V10 suggests that the amorphous and icosahedral phases in these systems have similar short-range ordering.

Original language	English
Pages (from-to)	9338-9341
Number of pages	4
Journal	Physical Review B
Volume	40
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.40.9338
State	Published - 1989

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title = "Electron-energy-loss spectroscopy studies of icosahedral-phase plasmons",

abstract = "Previous electron-energy-loss spectroscopy (EELS) measurements on amorphous and icosahedral (i-phase) Al6Mn show a broader plasmon excitation in the i-phase than in the amorphous phase [Chen et al., Phys. Rev. Lett. 57, 743 (1986)]. This broadening is presumed to arise from differences between the electronic structures of the phases. We present measurements on i-phase Al6Mn that confirm these earlier results. We also present measurements that show plasmon widths that are similar in i-phase and amorphous Pd58.8U20.6Si20.6, and in i-phase and amorphous Al75Cu15V10. Thus, the additional broadening in i-phase Al6Mn is not a general feature of the icosahedral phase. The phase independence of plasmon widths in Pd58.8U20.6Si20.6 and Al75Cu15V10 suggests that the amorphous and icosahedral phases in these systems have similar short-range ordering.",

author = "Levine, \{L. E.\} and Gibbons, \{P. C.\} and Kelton, \{K. F.\}",

year = "1989",

doi = "10.1103/PhysRevB.40.9338",

language = "English",

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journal = "Physical Review B",

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TY - JOUR

T1 - Electron-energy-loss spectroscopy studies of icosahedral-phase plasmons

AU - Levine, L. E.

AU - Gibbons, P. C.

AU - Kelton, K. F.

PY - 1989

Y1 - 1989

N2 - Previous electron-energy-loss spectroscopy (EELS) measurements on amorphous and icosahedral (i-phase) Al6Mn show a broader plasmon excitation in the i-phase than in the amorphous phase [Chen et al., Phys. Rev. Lett. 57, 743 (1986)]. This broadening is presumed to arise from differences between the electronic structures of the phases. We present measurements on i-phase Al6Mn that confirm these earlier results. We also present measurements that show plasmon widths that are similar in i-phase and amorphous Pd58.8U20.6Si20.6, and in i-phase and amorphous Al75Cu15V10. Thus, the additional broadening in i-phase Al6Mn is not a general feature of the icosahedral phase. The phase independence of plasmon widths in Pd58.8U20.6Si20.6 and Al75Cu15V10 suggests that the amorphous and icosahedral phases in these systems have similar short-range ordering.

AB - Previous electron-energy-loss spectroscopy (EELS) measurements on amorphous and icosahedral (i-phase) Al6Mn show a broader plasmon excitation in the i-phase than in the amorphous phase [Chen et al., Phys. Rev. Lett. 57, 743 (1986)]. This broadening is presumed to arise from differences between the electronic structures of the phases. We present measurements on i-phase Al6Mn that confirm these earlier results. We also present measurements that show plasmon widths that are similar in i-phase and amorphous Pd58.8U20.6Si20.6, and in i-phase and amorphous Al75Cu15V10. Thus, the additional broadening in i-phase Al6Mn is not a general feature of the icosahedral phase. The phase independence of plasmon widths in Pd58.8U20.6Si20.6 and Al75Cu15V10 suggests that the amorphous and icosahedral phases in these systems have similar short-range ordering.

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U2 - 10.1103/PhysRevB.40.9338

DO - 10.1103/PhysRevB.40.9338

M3 - Article

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VL - 40

SP - 9338

EP - 9341

JO - Physical Review B

JF - Physical Review B

IS - 13

ER -

Electron-energy-loss spectroscopy studies of icosahedral-phase plasmons

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