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 language | English |
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Pages (from-to) | 33-40 |
Number of pages | 8 |
Journal | Physica C: Superconductivity and its applications |
Volume | 303 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - Jul 10 1998 |
Externally published | Yes |
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