Structure of the Fivefold Surface of the Icosahedral Al-Cu-Fe Quasicrystal: Experimental Evidence of Bulk Truncations at Larger Interlayer Spacings

H.R. Sharma (1) , Vincent Fournée (2) , M. Shimoda (1, 3) , A.R. Ross (4) , T.A. Lograsso (4) , A.P. Tsai (1, 3, 5) , A. Yamamoto (6)

1 SORST - Solution Oriented Research for Science and Technology
2 LSG2M - Laboratoire de Science et Génie des Matériaux et de Métallurgie
3 NIMS - National Institute for Materials Science
4 Ames Laboratory [Ames, USA]
5 IMRAM - Institute for Multidisciplinary Research on Advanced Materials
6 Advanced Materials Laboratory

Based on scanning tunneling microscopy of the fivefold surface of the icosahedral Al-Cu-Fe quasicrystal and the refined structure model of the isostructural i-Al-Pd-Mn, we present evidence that the surface corresponds to bulk truncations at the positions where blocks of atomic layers are separated by larger interlayer spacings (gaps). Both step-height distribution and high resolution scanning tunneling microscopy images on terraces reveal bulk truncations at larger gaps.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

H.R. Sharma, Vincent Fournée, M. Shimoda, A.R. Ross, T.A. Lograsso, et al.. Structure of the Fivefold Surface of the Icosahedral Al-Cu-Fe Quasicrystal: Experimental Evidence of Bulk Truncations at Larger Interlayer Spacings. Physical Review Letters, 2004, 93 (16), ⟨10.1103/PhysRevLett.93.165502⟩. ⟨hal-01665107⟩