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

doi:10.1016/S0921-4534(98)00211-1

Low-temperature specific heat of the electron-doped superconductor Pr_2-xCe_xCuO_4-∂

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

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

We report measurements of the low-temperature specific heat of superconducting and non-superconducting Pr_1.85Ce_0.15CuO₄ and non-superconducting Pr_1.875Ce_0.125CuO₄ 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
DOIs	https://doi.org/10.1016/S0921-4534(98)00211-1
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

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Hargreaves, T. E., Noma, H., Akimitsu, J., Brewer, D. F., Hussey, N. E., & Thomson, A. L. (1998). Low-temperature specific heat of the electron-doped superconductor Pr_2-xCe_xCuO_4-∂. Physica C: Superconductivity and its applications, 303(1-2), 33-40. https://doi.org/10.1016/S0921-4534(98)00211-1

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title = "Low-temperature specific heat of the electron-doped superconductor Pr2-xCexCuO4-∂",

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.",

keywords = "Electron-doped cuprates, Localization effects, Low-temperature specific heat",

author = "Hargreaves, {T. E.} and H. Noma and J. Akimitsu and Brewer, {D. F.} and Hussey, {N. E.} and Thomson, {A. L.}",

year = "1998",

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T1 - Low-temperature specific heat of the electron-doped superconductor Pr2-xCexCuO4-∂

AU - Hargreaves, T. E.

AU - Noma, H.

AU - Akimitsu, J.

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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