TY - JOUR
T1 - Microwave measurements of overdoped Y0.9Ca0.1Ba2Cu3O7-δ thin films
AU - Farber, E.
AU - Deutscher, G.
PY - 2003/5
Y1 - 2003/5
N2 - In the present report we show, for the first time, that a complex order parameter is not just a surface effect, but a bulk: property in overdoped Y0.9Ca0.1Ba2Cu3O7- δ thin films. The penetration depth change versus temperature is very well fitted to a complex order parameter of the form Δdx2 - y2 + iδdxy, where Δ = 14.5 me V and δ = 2meV. This result contrasts our previous results for optimally doped YBCO thin films where a power law for the penetration depth versus temperature was reported, corresponding to a dx2-y2 - wave order parameter. The penetration depth behavior is accompanied by a rapid reduction of the scattering rate at low temperatures, in contrast with a flattening of this quantity for the optimally doped YBCO films.
AB - In the present report we show, for the first time, that a complex order parameter is not just a surface effect, but a bulk: property in overdoped Y0.9Ca0.1Ba2Cu3O7- δ thin films. The penetration depth change versus temperature is very well fitted to a complex order parameter of the form Δdx2 - y2 + iδdxy, where Δ = 14.5 me V and δ = 2meV. This result contrasts our previous results for optimally doped YBCO thin films where a power law for the penetration depth versus temperature was reported, corresponding to a dx2-y2 - wave order parameter. The penetration depth behavior is accompanied by a rapid reduction of the scattering rate at low temperatures, in contrast with a flattening of this quantity for the optimally doped YBCO films.
UR - http://www.scopus.com/inward/record.url?scp=0038780799&partnerID=8YFLogxK
U2 - 10.1023/A:1022919823699
DO - 10.1023/A:1022919823699
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AN - SCOPUS:0038780799
SN - 0022-2291
VL - 131
SP - 563
EP - 567
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
IS - 3-4
ER -