Magnetoresistance of Al70Pd22.5Re7.5 quasicrystals in the variable-range hopping regime

Tzung I. Su; Cheng Ren Wang; Shui Tien Lin; Ralph Rosenbaum

doi:10.1103/PhysRevB.66.054438

Magnetoresistance of Al₇₀Pd_22.5Re_7.5 quasicrystals in the variable-range hopping regime

Tzung I. Su, Cheng Ren Wang, Shui Tien Lin, Ralph Rosenbaum

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

The temperature dependence of the magnetoresistance (MR) of insulating Al₇₀Pd_22.5Re_7.5 quasicrystals taken at liquid-helium temperatures can be explained by the theories of MR-the forward interference and the wave-function shrinkage - in the variable-range hopping (VRH) regime. By analyzing the MR data with the theories mentioned above, a crossover from Mott VRH conduction to Efros-Shklovskii VRH conduction at liquid helium temperatures was identified in a highly resistive Al₇₀Pd_22.5Re_7.5 sample. The rapid decrease in the negative MR of highly resistive samples at low temperatures might be attributed to the conduction via the states in the Coulomb gap.

Original language	English
Article number	054438
Pages (from-to)	544381-544386
Number of pages	6
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	66
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.66.054438
State	Published - 1 Aug 2002

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title = "Magnetoresistance of Al70Pd22.5Re7.5 quasicrystals in the variable-range hopping regime",

abstract = "The temperature dependence of the magnetoresistance (MR) of insulating Al70Pd22.5Re7.5 quasicrystals taken at liquid-helium temperatures can be explained by the theories of MR-the forward interference and the wave-function shrinkage - in the variable-range hopping (VRH) regime. By analyzing the MR data with the theories mentioned above, a crossover from Mott VRH conduction to Efros-Shklovskii VRH conduction at liquid helium temperatures was identified in a highly resistive Al70Pd22.5Re7.5 sample. The rapid decrease in the negative MR of highly resistive samples at low temperatures might be attributed to the conduction via the states in the Coulomb gap.",

author = "Su, {Tzung I.} and Wang, {Cheng Ren} and Lin, {Shui Tien} and Ralph Rosenbaum",

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AU - Rosenbaum, Ralph

PY - 2002/8/1

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N2 - The temperature dependence of the magnetoresistance (MR) of insulating Al70Pd22.5Re7.5 quasicrystals taken at liquid-helium temperatures can be explained by the theories of MR-the forward interference and the wave-function shrinkage - in the variable-range hopping (VRH) regime. By analyzing the MR data with the theories mentioned above, a crossover from Mott VRH conduction to Efros-Shklovskii VRH conduction at liquid helium temperatures was identified in a highly resistive Al70Pd22.5Re7.5 sample. The rapid decrease in the negative MR of highly resistive samples at low temperatures might be attributed to the conduction via the states in the Coulomb gap.

AB - The temperature dependence of the magnetoresistance (MR) of insulating Al70Pd22.5Re7.5 quasicrystals taken at liquid-helium temperatures can be explained by the theories of MR-the forward interference and the wave-function shrinkage - in the variable-range hopping (VRH) regime. By analyzing the MR data with the theories mentioned above, a crossover from Mott VRH conduction to Efros-Shklovskii VRH conduction at liquid helium temperatures was identified in a highly resistive Al70Pd22.5Re7.5 sample. The rapid decrease in the negative MR of highly resistive samples at low temperatures might be attributed to the conduction via the states in the Coulomb gap.

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Magnetoresistance of Al₇₀Pd_22.5Re_7.5 quasicrystals in the variable-range hopping regime

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