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 › peer-review

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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10.1016/S0921-4534(98)00211-1

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@article{082a69fbee7e498c9464f420ee7cd007,

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.}",

note = "Funding Information: The authors would like to thank Dr. C.S. McMenamin and Dr. S. Chastin for helpful comments and Mr. A.J. Osborne for technical assistance. This work was supported by EPSRC grant, reference number R/F 51845.",

year = "1998",

month = jul,

day = "10",

doi = "10.1016/S0921-4534(98)00211-1",

language = "English",

volume = "303",

pages = "33--40",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "1-2",

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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, J.

AU - Brewer, D. F.

AU - Hussey, N. E.

AU - Thomson, A. L.

N1 - Funding Information: The authors would like to thank Dr. C.S. McMenamin and Dr. S. Chastin for helpful comments and Mr. A.J. Osborne for technical assistance. This work was supported by EPSRC grant, reference number R/F 51845.

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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DO - 10.1016/S0921-4534(98)00211-1

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