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Title: Multifold Seebeck increase in RuO{sub 2} films by quantum-guided lanthanide dilute alloying

Ab initio predictions indicating that alloying RuO{sub 2} with La, Eu, or Lu can increase the Seebeck coefficient α manifold due to quantum confinement effects are validated in sputter-deposited La-alloyed RuO{sub 2} films showing fourfold α increase. Combinatorial screening reveals that α enhancement correlates with La-induced lattice distortion, which also decreases the thermal conductivity twentyfold, conducive for high thermoelectric figures of merit. These insights should facilitate the rational design of high efficiency oxide-based thermoelectrics through quantum-guided alloying.
Authors:
; ;  [1] ; ;  [2] ;  [3] ;  [4] ;  [5] ;  [4] ;  [1] ;  [5]
  1. Materials Chemistry, RWTH Aachen University, Kopernikusstr. 10, D-52074 Aachen (Germany)
  2. Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, 110 8th St., Troy, New York 12180 (United States)
  3. Materials Science and Engineering Department, Rensselaer Polytechnic Institute, 110 8th St., Troy, New York 12180 (United States)
  4. Air Force Research Laboratory, Materials and Manufacturing Directorate, WPAFB, Ohio 45433 (United States)
  5. (United States)
Publication Date:
OSTI Identifier:
22283261
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 5; Other Information: (c) 2014 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; CONFINEMENT; LANTHANUM COMPOUNDS; RUTHENIUM OXIDES; SPUTTERING; THERMAL CONDUCTIVITY; THERMOELECTRIC MATERIALS; THERMOELECTRIC PROPERTIES; THIN FILMS