Low-temperature specific heat of the electron-doped superconductor Pr2-xCexCuO4-∂

T. E. Hargreaves, H. Noma, J. Akimitsu, D. F. Brewer, N. E. Hussey, A. L. Thomson

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We report measurements of the low-temperature specific heat of superconducting and non-superconducting Pr1.85Ce0.15CuO4 and non-superconducting Pr1.875Ce0.125CuO4 between 0.2 K and 4 K in magnetic fields up to 4 tesla. For all three samples, the zero-field specific heat C(T) consists of three contributions, a nuclear (T-2) term, a phononic (T3) term and a residual low-power term proportional to Tn where n < 1. The residual term follows an unusual temperature dependence in a magnetic field, similar to that found in hole-doped cuprate superconductors, suggesting a common origin for this residual term in all doped cuprates. We discuss the possibility that this low-power term arises from disorder-induced localization of normal carriers at low temperatures.

Original languageEnglish
Pages (from-to)33-40
Number of pages8
JournalPhysica C: Superconductivity and its applications
Volume303
Issue number1-2
DOIs
Publication statusPublished - Jul 10 1998
Externally publishedYes

Keywords

  • Electron-doped cuprates
  • Localization effects
  • Low-temperature specific heat

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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