Evidence for a Nodeless Gap from the Superfluid Density of Optimally Doped Pr1.855Ce0.145CuO4-y Films

John A. Skinta; Thomas R. Lemberger; Tine Greibe; M. Natio

doi:10.1103/PhysRevLett.88.207003

Evidence for a Nodeless Gap from the Superfluid Density of Optimally Doped Pr_1.855Ce_0.145CuO_4-y Films

John A. Skinta, Thomas R. Lemberger , Tine Greibe, M. Natio

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We present measurements of the ab-plane magnetic penetration depth, λ(T), in five optimally doped Pr_1.855Ce_0.145CuO_4-y films for 1.6K≤T≤T_c∼24K. Low resistivities, high superfluid densities n_s(T)∝λ^-2(T), high T_c’s, and small transition widths are reproducible and indicative of excellent film quality. For all five films, λ^-2(T)/λ^-2(0) at low T is well fitted by an exponential temperature dependence with a gap, Δ_min, of 0.85kBTc. This behavior is consistent with a nodeless gap and is incompatible with d-wave superconductivity.

Original language	English
Article number	207003
Journal	Physical Review Letters
Volume	88
Issue number	20
Number of pages	4
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.88.207003
Publication status	Published - 2002
Externally published	Yes

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title = "Evidence for a Nodeless Gap from the Superfluid Density of Optimally Doped Pr1.855Ce0.145CuO4-y Films",

abstract = "We present measurements of the ab-plane magnetic penetration depth, λ(T), in five optimally doped Pr1.855Ce0.145CuO4-y films for 1.6K≤T≤Tc∼24K. Low resistivities, high superfluid densities ns(T)∝λ-2(T), high Tc{\textquoteright}s, and small transition widths are reproducible and indicative of excellent film quality. For all five films, λ-2(T)/λ-2(0) at low T is well fitted by an exponential temperature dependence with a gap, Δmin, of 0.85kBTc. This behavior is consistent with a nodeless gap and is incompatible with d-wave superconductivity.",

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T1 - Evidence for a Nodeless Gap from the Superfluid Density of Optimally Doped Pr1.855Ce0.145CuO4-y Films

AU - Skinta, John A.

AU - Lemberger , Thomas R.

AU - Greibe, Tine

AU - Natio, M.

PY - 2002

Y1 - 2002

N2 - We present measurements of the ab-plane magnetic penetration depth, λ(T), in five optimally doped Pr1.855Ce0.145CuO4-y films for 1.6K≤T≤Tc∼24K. Low resistivities, high superfluid densities ns(T)∝λ-2(T), high Tc’s, and small transition widths are reproducible and indicative of excellent film quality. For all five films, λ-2(T)/λ-2(0) at low T is well fitted by an exponential temperature dependence with a gap, Δmin, of 0.85kBTc. This behavior is consistent with a nodeless gap and is incompatible with d-wave superconductivity.

AB - We present measurements of the ab-plane magnetic penetration depth, λ(T), in five optimally doped Pr1.855Ce0.145CuO4-y films for 1.6K≤T≤Tc∼24K. Low resistivities, high superfluid densities ns(T)∝λ-2(T), high Tc’s, and small transition widths are reproducible and indicative of excellent film quality. For all five films, λ-2(T)/λ-2(0) at low T is well fitted by an exponential temperature dependence with a gap, Δmin, of 0.85kBTc. This behavior is consistent with a nodeless gap and is incompatible with d-wave superconductivity.

U2 - 10.1103/PhysRevLett.88.207003

DO - 10.1103/PhysRevLett.88.207003

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JO - Physical Review Letters

JF - Physical Review Letters

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