Origin of the Hall-coefficient anisotropy in the Y-Al-Ni-Co periodic approximant to the decagonal phase

被引：21

作者：

Komelj, M. ^{[1
]}

Ivkov, J. ^{[2
]}

Smontara, A. ^{[2
]}

Gille, P. ^{[3
]}

Jeglic, P. ^{[1
]}

Dolinsek, J. ^{[1
]}

机构：

[1] Univ Ljubljana, Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia

[2] Univ Zagreb, Inst Phys, Lab Study Transport Problems, HR-10001 Zagreb, Croatia

[3] Univ Munich, Dept Earth & Environm Sci, Crystallog Sect, D-80333 Munich, Germany

来源：

SOLID STATE COMMUNICATIONS | 2009年 / 149卷 / 13-14期

关键词：

Complex intermetallics; Quasicrystalline approximants; Electronic transport; Hall effect;

D O I：

10.1016/j.ssc.2009.01.013

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present an experimental and theoretical study of the anisotropic Hall coefficient RH of the Y-Al-Ni-Co periodic approximant to the decagonal phase with composition Al76Co22Ni2. Performing ab-initio calculation of R-H for the original Y-Al-Ni-Co structural model [B. Zhang, V. Gramlich, W. Steurer, Z. Kristallogr. 210 (1995) 498] and its relaxed version, we reproduced the experimentally observed anisotropy for all combinations of crystalline directions of the electric current and magnetic field, where the relaxed model yielded better quantitative matching to the experiment. The origin of the anisotropic Hall coefficient is the anisotropic Fermi surface, the anisotropy of which originates from the specific stacked-layer structure of the Y-Al-Ni-Co compound and the chemical decoration of the lattice. Due to the structural similarity of Y-Al-Ni-Co to the d-Al-Ni-Co-type decagonal quasicrystals, the same physical picture explains the universal R-H anisotropy of this family of quasicrystals, where R-H changes sign along different crystalline directions. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：515 / 518

页数：4

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