Electron Localization in Metallic Quasicrystals

Pierce, F. S.; Poon, S. J.; Guo, Qi

doi:10.1126/science.261.5122.737

Cited by 255 publications

(114 citation statements)

References 28 publications

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“…s monotonically increases with increasing temperature for all samples. This nonmetallic behavior is in agreement with the previous results for the poly-grain and mono-crystalline Al--Pd--Re quasicrystals [2,[5][6][7][8][9][10][11][12][13][14][15][16]. The s increases with increasing the relative density.…”

Section: Methodssupporting

confidence: 81%

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Thermoelectric properties of Al–Pd–Re quasicrystal sintered by Spark Plasma Sintering (SPS): effect of improvement of microstructure

Takagiwa¹,

Kamimura²,

Hosoi³

et al. 2009

Zeitschrift Für Kristallographie - Crystalline Materials

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Quasicrystals / Thermoelectric properties / Microstructure / Spark Plasma Sintering (SPS) / Al--Pd--Re Abstract. We report the thermoelectric properties of poly-grain Al--Pd--Re icosahedral quasicrystals and discuss an effect of improvement of their microstructure. The improvement of microstructure by using Spark Plasma Sintering (SPS) method resulted into a large increase of the electrical conductivity but less increase of the thermal conductivity. The relative density dramatically increased up to more than 90% by SPS. On the other hand, the microstructure itself does not have critical influence on the Seebeck coefficient, which is found to be strongly correlated with e=a (sample's compositions). Consequently, the dimensionless figure of merit (ZT) increased three times from 0.05 to 0.15.

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Section: Methodssupporting

confidence: 81%

“…Al--Pd--Re icosahedral quasicrystals exhibit the highest electrical resistivity among all icosahedral phases [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric properties of Al–Pd–Re quasicrystal sintered by Spark Plasma Sintering (SPS): effect of improvement of microstructure

Takagiwa¹,

Kamimura²,

Hosoi³

et al. 2009

Zeitschrift Für Kristallographie - Crystalline Materials

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“…48 The inadequacy of the exp(ϪE/k B T) fitting implies the absence of a conventional semiconductinglike gap in QC's. 21 Additional evidence comes from the fact that, for the heavily doped semiconductors, the (T) curve decreases at high enough temperatures when all the impurity levels have become ionized. No evidence of such a limiting threshold has been observed in QC's.…”

Section: ͑T ͒ϭ͑ 0 ͒ϩ⌬͑ T ͒ ͑1͒mentioning

confidence: 99%

Universal features in the electrical conductivity of icosahedral Al-transition-metal quasicrystals

Maciá

2002

Phys. Rev. B

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In this work we report the existence of certain universal features in the temperature dependence of the electrical conductivity of Al-transition-metal icosahedral quasicrystals, extending the results previously reported on the inverse Matthiessen rule ͓D. Mayou, C. Berger, F. Cyrot-Lackmann, T. Klein, and P. Lanco, Phys. Rev. Lett. 70, 3915 ͑1993͔͒. We propose a tentative classification scheme providing a unified description of the electrical conductivity curves over a broad temperature range. We introduce a phenomenological model describing the electrical conductivity of icosahedral quasicrystals, deriving closed analytical expressions. We compare our analytical results with suitable experimental data and illustrate the use of the introduced phenomenological coefficient in order to extract information about the electronic structure of the samples from a fitting analysis of the experimental conductivity curves.

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“…The T 1/2 power law at law temperature on quasicrystals has been reported [22,23]. The T 1/2 power law below …”

Section: Electrical Conductivities In Al--cu--fe and Al--cu--ru Quasimentioning

confidence: 99%

Anomalous conduction mechanisms of Al-based stable quasicrystals

Kanazawa¹,

Kitahata²,

Sekiyama³

2008

Zeitschrift Für Kristallographie

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Abstract. We have analyzed the electrical conductivities of Al--Cu--Fe and Al--Cu--Ru quasicrystals in a low temperature region, taking into account the conducting mechanism of the quasicrystal-like system. The present analysis suggests strongly that not only the weak localization and the electron-electron interaction contributions but also the conducting effect of the quasicrystal-like system should be considered.

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Electron Localization in Metallic Quasicrystals

Cited by 255 publications

References 28 publications

Thermoelectric properties of Al–Pd–Re quasicrystal sintered by Spark Plasma Sintering (SPS): effect of improvement of microstructure

Thermoelectric properties of Al–Pd–Re quasicrystal sintered by Spark Plasma Sintering (SPS): effect of improvement of microstructure

Universal features in the electrical conductivity of icosahedral Al-transition-metal quasicrystals

Anomalous conduction mechanisms of Al-based stable quasicrystals

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