From Superconductivity Towards Thermoelectricity: Ge-Based Skutterudites

  • S. Humer
  • E. Royanian
  • H. Michor
  • E. Bauer
  • A. Grytsiv
  • M. X. Chen
  • R. Podloucky
  • P. Rogl
Conference paper
Part of the NATO Science for Peace and Security Series B: Physics and Biophysics book series (NAPSB)

Abstract

We report on a substitution of Ge by Sb in \(\mathrm {LaPt_4Ge_{12}}\), which significantly changes ground state properties, from a superconducting state below \(T_c = 8\) K for \(\mathrm {LaPt_4Ge_{12}}\) to a nearly insulating state in \(\mathrm {LaPt_4Ge_{7}Sb_5}\). Evidence for this crossover is from electronic structure calculations based on VASP and is reflected in the specific heat, electrical resistivity and the Seebeck data as well. This electron-doping drives a well behaving metal with poor thermoelectric properties towards a bad metal, in the proximity of a metal-to-insulator transition with a substantially enhanced Seebeck effect. Results derived for \(\mathrm {LaPt_4Ge_{12-x}Sb_x}\) can serve as feedback to improve the thermoelectric performance of technologically interesting multicomponent skutterudites.

Keywords

Fermi Energy Seebeck Coefficient Thermoelectric Material Electronic Structure Calculation Charge Carrier Density 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • S. Humer
    • 1
  • E. Royanian
    • 1
  • H. Michor
    • 1
  • E. Bauer
    • 1
  • A. Grytsiv
    • 2
  • M. X. Chen
    • 2
  • R. Podloucky
    • 2
  • P. Rogl
    • 2
  1. 1.Institute of Solid State PhysicsVienna University of TechnologyWienAustria
  2. 2.Institute of Physical ChemistryUniversity ViennaWienAustria

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