TY - JOUR
T1 - Magnetic penetration depth in electron-doped cuprates - Evidence for gap nodes
AU - Prozorov, Ruslan
AU - Giannetta, Russell W.
AU - Fournier, Patrick
AU - Greene, Richard L.
N1 - Funding Information:
We thank J. R. Cooper and S. M. Anlage for useful discussions. This work was supported by Science and Technology Center for Superconductivity Grant No. NSF-DMR 91-20000. Work in Maryland is supported by Grant No. NSF-DMR 97-32736
PY - 2000
Y1 - 2000
N2 - The in-plane penetration depth λ(T) is measured in electron-doped single crystals Nd1.85Ce0.15CuO4-x (NCCO) and Pr1.85Ce0.15CuO4-x (PCCO) using an 11 MHz LC resonator. In NCCO, λ(T) exhibits a minimum at 3.8 K and a pronounced upturn down to 0.4 K due to the paramagnetic contribution of Nd3+ ions. The London penetration depth contribution is linear in T. The paramagnetic contribution is absent in PCCO, where λ(T)-T2 at low temperatures. Our results indicate the presence of nodes in the superconducting gap, i.e., non s-wave symmetry of the order parameter in electron-doped cuprates.
AB - The in-plane penetration depth λ(T) is measured in electron-doped single crystals Nd1.85Ce0.15CuO4-x (NCCO) and Pr1.85Ce0.15CuO4-x (PCCO) using an 11 MHz LC resonator. In NCCO, λ(T) exhibits a minimum at 3.8 K and a pronounced upturn down to 0.4 K due to the paramagnetic contribution of Nd3+ ions. The London penetration depth contribution is linear in T. The paramagnetic contribution is absent in PCCO, where λ(T)-T2 at low temperatures. Our results indicate the presence of nodes in the superconducting gap, i.e., non s-wave symmetry of the order parameter in electron-doped cuprates.
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U2 - 10.1016/S0921-4534(00)00945-X
DO - 10.1016/S0921-4534(00)00945-X
M3 - Article
AN - SCOPUS:0342961827
SN - 0921-4534
VL - 341-348
SP - 1703
EP - 1704
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - PART 2
ER -