A LEED comparison of structural stabilities of the three high-symmetry surfaces of Al-Pd-Mn bulk quasicrystals

Z. Shen; W. Raberg; M. Heinzig; C. J. Jenks; V. Fournée; M. A. Van Hove; T. A. Lograsso; D. Delaney; T. Cai; P. C. Canfield; I. R. Fisher; A. I. Goldman; M. J. Kramer; P. A. Thiel

doi:10.1016/S0039-6028(99)01183-8

A LEED comparison of structural stabilities of the three high-symmetry surfaces of Al-Pd-Mn bulk quasicrystals

Z. Shen, W. Raberg, M. Heinzig, C. J. Jenks, V. Fournée, M. A. Van Hove, T. A. Lograsso, D. Delaney, T. Cai, P. C. Canfield, I. R. Fisher, A. I. Goldman, M. J. Kramer, P. A. Thiel

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Abstract

It is shown that low-energy electron diffraction (LEED) patterns of the three high-symmetry surfaces (fivefold, threefold and twofold) of icosahedral Al-Pd-Mn are all compatible with quasicrystallinity, under specific conditions of preparation. This conclusion results from comparing symmetries of experimental surface LEED patterns with bulk X-ray diffraction data which are converted to the conditions of the LEED experiment. This conclusion is also based upon an analysis of relative diffraction spot spacings in LEED. Hence, none of the three surfaces exhibits a massive lateral reconstruction, i.e. massive deviation from quasicrystallinity. The LEED pattern of the fivefold surface is distinct from the LEED pattern of the pseudo-tenfold surface of an orthorhombic approximant. We believe that this rules out the possibility that the fivefold surface of the icosahedral quasicrystal reconstructs to an approximant with tenfold or pseudo-10-fold symmetry. The twofold and threefold surfaces facet more readily, indicating qualitatively that they are less stable than the fivefold surface.

Original language	English
Pages (from-to)	1-11
Number of pages	11
Journal	Surface Science
Volume	450
Issue number	1-2
DOIs	https://doi.org/10.1016/S0039-6028(99)01183-8
State	Published - Apr 1 2000
Externally published	Yes

Funding

M. Quiquandon and J.M. Dubois provided valuable comments and suggestions. This work was supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Materials Sciences Division, of the U.S. Department of Energy under Contracts No. DE-AC03-76SF00098 and W-405-Eng-82.

Funders	Funder number
Materials Sciences Division
Office of Energy Research
U.S. Department of Energy	W-405-Eng-82, DE-AC03-76SF00098
Basic Energy Sciences

Keywords

Alloys
Aluminum
Low energy electron diffraction (LEED)
Metallic surfaces

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10.1016/S0039-6028(99)01183-8

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Shen, Z., Raberg, W., Heinzig, M., Jenks, C. J., Fournée, V., Van Hove, M. A., Lograsso, T. A., Delaney, D., Cai, T., Canfield, P. C., Fisher, I. R., Goldman, A. I., Kramer, M. J., & Thiel, P. A. (2000). A LEED comparison of structural stabilities of the three high-symmetry surfaces of Al-Pd-Mn bulk quasicrystals. Surface Science, 450(1-2), 1-11. https://doi.org/10.1016/S0039-6028(99)01183-8

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title = "A LEED comparison of structural stabilities of the three high-symmetry surfaces of Al-Pd-Mn bulk quasicrystals",

abstract = "It is shown that low-energy electron diffraction (LEED) patterns of the three high-symmetry surfaces (fivefold, threefold and twofold) of icosahedral Al-Pd-Mn are all compatible with quasicrystallinity, under specific conditions of preparation. This conclusion results from comparing symmetries of experimental surface LEED patterns with bulk X-ray diffraction data which are converted to the conditions of the LEED experiment. This conclusion is also based upon an analysis of relative diffraction spot spacings in LEED. Hence, none of the three surfaces exhibits a massive lateral reconstruction, i.e. massive deviation from quasicrystallinity. The LEED pattern of the fivefold surface is distinct from the LEED pattern of the pseudo-tenfold surface of an orthorhombic approximant. We believe that this rules out the possibility that the fivefold surface of the icosahedral quasicrystal reconstructs to an approximant with tenfold or pseudo-10-fold symmetry. The twofold and threefold surfaces facet more readily, indicating qualitatively that they are less stable than the fivefold surface.",

keywords = "Alloys, Aluminum, Low energy electron diffraction (LEED), Metallic surfaces",

author = "Z. Shen and W. Raberg and M. Heinzig and Jenks, {C. J.} and V. Fourn{\'e}e and {Van Hove}, {M. A.} and Lograsso, {T. A.} and D. Delaney and T. Cai and Canfield, {P. C.} and Fisher, {I. R.} and Goldman, {A. I.} and Kramer, {M. J.} and Thiel, {P. A.}",

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doi = "10.1016/S0039-6028(99)01183-8",

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Shen, Z, Raberg, W, Heinzig, M, Jenks, CJ, Fournée, V, Van Hove, MA, Lograsso, TA, Delaney, D, Cai, T, Canfield, PC, Fisher, IR, Goldman, AI, Kramer, MJ & Thiel, PA 2000, 'A LEED comparison of structural stabilities of the three high-symmetry surfaces of Al-Pd-Mn bulk quasicrystals', Surface Science, vol. 450, no. 1-2, pp. 1-11. https://doi.org/10.1016/S0039-6028(99)01183-8

TY - JOUR

T1 - A LEED comparison of structural stabilities of the three high-symmetry surfaces of Al-Pd-Mn bulk quasicrystals

AU - Shen, Z.

AU - Raberg, W.

AU - Heinzig, M.

AU - Jenks, C. J.

AU - Fournée, V.

AU - Van Hove, M. A.

AU - Lograsso, T. A.

AU - Delaney, D.

AU - Cai, T.

AU - Canfield, P. C.

AU - Fisher, I. R.

AU - Goldman, A. I.

AU - Kramer, M. J.

AU - Thiel, P. A.

PY - 2000/4/1

Y1 - 2000/4/1

N2 - It is shown that low-energy electron diffraction (LEED) patterns of the three high-symmetry surfaces (fivefold, threefold and twofold) of icosahedral Al-Pd-Mn are all compatible with quasicrystallinity, under specific conditions of preparation. This conclusion results from comparing symmetries of experimental surface LEED patterns with bulk X-ray diffraction data which are converted to the conditions of the LEED experiment. This conclusion is also based upon an analysis of relative diffraction spot spacings in LEED. Hence, none of the three surfaces exhibits a massive lateral reconstruction, i.e. massive deviation from quasicrystallinity. The LEED pattern of the fivefold surface is distinct from the LEED pattern of the pseudo-tenfold surface of an orthorhombic approximant. We believe that this rules out the possibility that the fivefold surface of the icosahedral quasicrystal reconstructs to an approximant with tenfold or pseudo-10-fold symmetry. The twofold and threefold surfaces facet more readily, indicating qualitatively that they are less stable than the fivefold surface.

AB - It is shown that low-energy electron diffraction (LEED) patterns of the three high-symmetry surfaces (fivefold, threefold and twofold) of icosahedral Al-Pd-Mn are all compatible with quasicrystallinity, under specific conditions of preparation. This conclusion results from comparing symmetries of experimental surface LEED patterns with bulk X-ray diffraction data which are converted to the conditions of the LEED experiment. This conclusion is also based upon an analysis of relative diffraction spot spacings in LEED. Hence, none of the three surfaces exhibits a massive lateral reconstruction, i.e. massive deviation from quasicrystallinity. The LEED pattern of the fivefold surface is distinct from the LEED pattern of the pseudo-tenfold surface of an orthorhombic approximant. We believe that this rules out the possibility that the fivefold surface of the icosahedral quasicrystal reconstructs to an approximant with tenfold or pseudo-10-fold symmetry. The twofold and threefold surfaces facet more readily, indicating qualitatively that they are less stable than the fivefold surface.

KW - Alloys

KW - Aluminum

KW - Low energy electron diffraction (LEED)

KW - Metallic surfaces

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DO - 10.1016/S0039-6028(99)01183-8

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AN - SCOPUS:0033904213

SN - 0039-6028

VL - 450

SP - 1

EP - 11

JO - Surface Science

JF - Surface Science

IS - 1-2

ER -

A LEED comparison of structural stabilities of the three high-symmetry surfaces of Al-Pd-Mn bulk quasicrystals

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