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Phys. Rev. B 74, 134201 (2006) [7 pages]

Extrinsic origin of the insulating behavior of polygrain icosahedral Al-Pd-Re quasicrystals

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J. Dolinšek1, P. J. McGuiness1, M. Klanjšek1, I. Smiljanić2, A. Smontara2, E. S. Zijlstra3, S. K. Bose4, I. R. Fisher5, M. J. Kramer6, and P. C. Canfield6
1J. Stefan Institute, University of Ljubljana, Jamova 39, SI-1000 Ljubljana, Slovenia
2Institute of Physics, Bijenička 46, POB 304, HR-10001 Zagreb, Croatia
3Theoretische Physik, Universität Kassel, D-34132 Kassel, Germany
4Department of Physics, Brock University, St. Catharines, Ontario, Canada L2S 3A1
5Geballe Laboratory for Advanced Materials and Department of Applied Physics, Stanford University, California 94035-4045, USA
6Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

Received 21 April 2006; revised 27 June 2006; published 3 October 2006

Polygrain icosahedral i-Al-Pd-Re quasicrystals are known to exhibit dramatically different electronic transport properties to other Al-based quasicrystals. By performing comparative experimental and theoretical studies of the electronic transport and electronic structure of polygrain and monocrystalline i-Al-Pd-Re samples, we show that the extraordinarily high electrical resistivity and the metal-to-insulator transition in the polygrain material are not intrinsic properties of the quasiperiodic lattice, but are of extrinsic origin due to the high porosity and the oxygen-rich weakly insulating regions in the material. We also compare theoretical electronic structures and experimental electrical resistivities of monocrystalline i-Al-Pd-Re and i-Al-Pd-Mn quasicrystals and show that there are no significant differences between these two isomorphous compounds, suggesting that i-Al-Pd-Re is on common ground with other Al-based quasicrystals. We present a structural model of i-Al-Pd-Re.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.74.134201
DOI:
10.1103/PhysRevB.74.134201
PACS:
61.44.Br, 71.23.Ft

See Also

Comment: S. J. Poon and Ö. Rapp, Comment on “Extrinsic origin of the insulating behavior of polygrain icosahedral Al-Pd-Re quasicrystals”, Phys. Rev. B 76, 216201 (2007).

Comment: J. Dolinšek, P. J. McGuiness, M. Klanjšek, I. Smiljanić, A. Smontara, E. S. Zijlstra, S. K. Bose, I. R. Fisher, M. J. Kramer, and P. C. Canfield, Reply to “Comment on ‘Extrinsic origin of the insulating behavior of polygrain icosahedral Al-Pd-Re quasicrystals’ ”, Phys. Rev. B 76, 216202 (2007).

 
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