Infrared signature of the superconducting state in Pr2-xCe xCuO4

A. Zimmers; R. P.S.M. Lobo; N. Bontemps; C. C. Homes; M. C. Barr; Y. Dagan; R. L. Greene

doi:10.1103/PhysRevB.70.132502

Infrared signature of the superconducting state in Pr_2-xCe _xCuO₄

A. Zimmers^*, R. P.S.M. Lobo, N. Bontemps, C. C. Homes, M. C. Barr, Y. Dagan, R. L. Greene

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We measured the far infrared reflectivity of two superconducting Pr _2-xCe_xCuCO₄ films above and below T _c. The reflectivity in the superconducting state increases and the optical conductivity drops at low energies, in agreement with the opening of a (possibly) anisotropic superconducting gap. The maximum energy of the gap scales roughly with T_c as 2Δ_max/k_BT _c≈4.7. We determined absolute values of the penetration depth at 5 K as λ_ab=(3300±700) Å for x=0.15 and λ_ab=(2000±300) Å for x=0.17. A spectral weight analysis shows that the Ferrell-Glover-Tinkham sum rule is satisfied at conventional low energy scales -4Δ_max.

Original language	English
Article number	132502
Pages (from-to)	132502-1-132502-4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	70
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.70.132502
State	Published - Oct 2004
Externally published	Yes

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title = "Infrared signature of the superconducting state in Pr2-xCe xCuO4",

abstract = "We measured the far infrared reflectivity of two superconducting Pr 2-xCexCuCO4 films above and below T c. The reflectivity in the superconducting state increases and the optical conductivity drops at low energies, in agreement with the opening of a (possibly) anisotropic superconducting gap. The maximum energy of the gap scales roughly with Tc as 2Δmax/kBT c≈4.7. We determined absolute values of the penetration depth at 5 K as λab=(3300±700) {\AA} for x=0.15 and λab=(2000±300) {\AA} for x=0.17. A spectral weight analysis shows that the Ferrell-Glover-Tinkham sum rule is satisfied at conventional low energy scales -4Δmax.",

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TY - JOUR

T1 - Infrared signature of the superconducting state in Pr2-xCe xCuO4

AU - Zimmers, A.

AU - Lobo, R. P.S.M.

AU - Bontemps, N.

AU - Homes, C. C.

AU - Barr, M. C.

AU - Dagan, Y.

AU - Greene, R. L.

PY - 2004/10

Y1 - 2004/10

N2 - We measured the far infrared reflectivity of two superconducting Pr 2-xCexCuCO4 films above and below T c. The reflectivity in the superconducting state increases and the optical conductivity drops at low energies, in agreement with the opening of a (possibly) anisotropic superconducting gap. The maximum energy of the gap scales roughly with Tc as 2Δmax/kBT c≈4.7. We determined absolute values of the penetration depth at 5 K as λab=(3300±700) Å for x=0.15 and λab=(2000±300) Å for x=0.17. A spectral weight analysis shows that the Ferrell-Glover-Tinkham sum rule is satisfied at conventional low energy scales -4Δmax.

AB - We measured the far infrared reflectivity of two superconducting Pr 2-xCexCuCO4 films above and below T c. The reflectivity in the superconducting state increases and the optical conductivity drops at low energies, in agreement with the opening of a (possibly) anisotropic superconducting gap. The maximum energy of the gap scales roughly with Tc as 2Δmax/kBT c≈4.7. We determined absolute values of the penetration depth at 5 K as λab=(3300±700) Å for x=0.15 and λab=(2000±300) Å for x=0.17. A spectral weight analysis shows that the Ferrell-Glover-Tinkham sum rule is satisfied at conventional low energy scales -4Δmax.

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Infrared signature of the superconducting state in Pr_2-xCe _xCuO₄

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