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Title: An origin of good electrical conduction in La{sub 4}BaCu{sub 5}O{sub 13+δ}

We have prepared a set of polycrystalline samples of the metallic copper oxide La{sub 4}BaCu{sub 5−x}Co{sub x}O{sub 13+δ} (0 ≤ x ≤ 0.35) and have measured the resistivity from 4 to 800 K. All the resistivities show metallic temperature dependence with a small magnitude less than 2 mΩ cm at 800 K, indicating that the metallic conduction is robust against impurities. The robust metallic conduction further suggests that this class of oxide is a promising candidate for electrical leads at high temperature, which might replace platinum. A detailed measurement and analysis on the Hall resistivity have revealed that at least two components are responsible for the electrical conduction, in which a large number of electrons of moderate mobility coexist with a much smaller number of holes of extremely high mobility. This large electron density well screens the impurity potential and retains the metallic conduction against 7% impurity doping.
Authors:
; ;  [1] ;  [2] ;  [3] ; ;  [4]
  1. Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)
  2. Department of Physics, Faculty of Science and Technology, Tokyo University of Science, Noda 278-8510 (Japan)
  3. Department of Physics, Meiji University, Kawasaki 214-8571 (Japan)
  4. Department of Chemistry, Aalto University, FI-00076 Aalto (Finland)
Publication Date:
OSTI Identifier:
22490802
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COPPER OXIDES; ELECTRON DENSITY; HOLES; IMPURITIES; MOBILITY; PLATINUM; POLYCRYSTALS; TEMPERATURE DEPENDENCE