TY - JOUR
T1 - Electronic transport behaviors of insulating icosahedral Al-Pd-Re bulk samples
AU - Rosenbaum, Rachel L.
AU - Grushko, B.
AU - Przepiórzyński, B.
N1 - Funding Information:
We greatly thank Drs. Chang-Ren Wang and Shr-Wen Wu and Prof. Shui-Tien Lin for fabricating the IQCs at the Department of Physics at the National Cheng Kung University in Tainan, 70101, Taiwan. We thank Professors Patricia Thiel and Cynthia Jenks at the Ames Laboratory, Mrs. Rachel Rosenbaum and Miss Gal Elhalel for editorial assistance. We acknowledge the Taiwan National Science Council for supporting the research project of Prof. S. T. Lin. A very major part of this work was performed at the NHMFL, which is supported both by the NSF Cooperative Agreement No. DMR 9527035 and by the State of Florida.
PY - 2006/1
Y1 - 2006/1
N2 - Electronic transport measurements are summarised on two insulating icosahedral quasicrystalline (IQC) Al69.0Pd22.8 Re8.2 samples. Data were taken between 0.020 K ≤ T ≤ 292 K and in magnetic fields Bs up to 18T. For a weakly insulating IQC, the electronic conductivity followed the expression: σ(T) = σ0Tzexp(T/T0) over four decades of temperature. For a strongly insulating sample, the conductivity above 0.3 K followed simple temperature power laws, σ(T) = σ0Tz. Below 0.2 K, the conductivity displayed an activated variable-range hopping (VRH) law. These fits included a conductivity contribution arising from the presence of a second metallic phase, which caused "weak saturation" of the measured resistances below 1 K.
AB - Electronic transport measurements are summarised on two insulating icosahedral quasicrystalline (IQC) Al69.0Pd22.8 Re8.2 samples. Data were taken between 0.020 K ≤ T ≤ 292 K and in magnetic fields Bs up to 18T. For a weakly insulating IQC, the electronic conductivity followed the expression: σ(T) = σ0Tzexp(T/T0) over four decades of temperature. For a strongly insulating sample, the conductivity above 0.3 K followed simple temperature power laws, σ(T) = σ0Tz. Below 0.2 K, the conductivity displayed an activated variable-range hopping (VRH) law. These fits included a conductivity contribution arising from the presence of a second metallic phase, which caused "weak saturation" of the measured resistances below 1 K.
KW - Al-Pd-Re
KW - Insulators
KW - Quasicrystals
KW - VRH activated conductivity
UR - http://www.scopus.com/inward/record.url?scp=32644448750&partnerID=8YFLogxK
U2 - 10.1007/s10909-005-9414-7
DO - 10.1007/s10909-005-9414-7
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AN - SCOPUS:32644448750
SN - 0022-2291
VL - 142
SP - 101
EP - 113
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
IS - 1-2
ER -