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 |
|---|---|
| Pages (from-to) | 33-40 |
| Number of pages | 8 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 303 |
| Issue number | 1-2 |
| Publication status | Published - Jul 10 1998 |
| Externally published | Yes |
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Keywords
- Electron-doped cuprates
- Localization effects
- Low-temperature specific heat
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Low-temperature specific heat of the electron-doped superconductor Pr2-xCexCuO4-∂ . / Hargreaves, T. E.; Noma, H.; Akimitsu, Jun; Brewer, D. F.; Hussey, N. E.; Thomson, A. L.
In: Physica C: Superconductivity and its Applications, Vol. 303, No. 1-2, 10.07.1998, p. 33-40.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Low-temperature specific heat of the electron-doped superconductor Pr2-xCexCuO4-∂
AU - Hargreaves, T. E.
AU - Noma, H.
AU - Akimitsu, Jun
AU - Brewer, D. F.
AU - Hussey, N. E.
AU - Thomson, A. L.
PY - 1998/7/10
Y1 - 1998/7/10
N2 - 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.
AB - 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.
KW - Electron-doped cuprates
KW - Localization effects
KW - Low-temperature specific heat
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M3 - Article
VL - 303
SP - 33
EP - 40
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-2
ER -