TY - JOUR
T1 - Robust finite gap in overdoped Y0.9Ca0.1Ba 2Cu3O7-δ thin films
AU - Farber, E.
AU - Deutscher, G.
AU - Gorshunov, B.
AU - Dressel, M.
N1 - Funding Information:
This work was supported in part by the Heinrich Hertz-Minerva Center for High Temperature Superconductivity, and by Oren Family chair of Experimental Solid State Physics.
PY - 2006/1
Y1 - 2006/1
N2 - A flattening of the penetration depth variation, Δλ(T), was observed in overdoped Y0.9Ca0.1Ba2Cu 3O7-δ thin films at low temperature. That observation was measured also in imperfect thin films, which contain a large density of a-axis grains. Lack of a model combining a crossover from a finite gap into a dx2-y2-wave within the unitary limit for the imperfect films, we have fitted our data using the BCS model. That best fit yields a finite gap of 1.7 meV, which is comparable with the idxy component obtained for films without a-axis grain where a complex order parameter was used. That flattening is accompanied by a steeper reduction of the quasi-particles scattering rate below 15 K for both quality thin films.
AB - A flattening of the penetration depth variation, Δλ(T), was observed in overdoped Y0.9Ca0.1Ba2Cu 3O7-δ thin films at low temperature. That observation was measured also in imperfect thin films, which contain a large density of a-axis grains. Lack of a model combining a crossover from a finite gap into a dx2-y2-wave within the unitary limit for the imperfect films, we have fitted our data using the BCS model. That best fit yields a finite gap of 1.7 meV, which is comparable with the idxy component obtained for films without a-axis grain where a complex order parameter was used. That flattening is accompanied by a steeper reduction of the quasi-particles scattering rate below 15 K for both quality thin films.
UR - http://www.scopus.com/inward/record.url?scp=33645035350&partnerID=8YFLogxK
U2 - 10.1016/j.jpcs.2005.10.035
DO - 10.1016/j.jpcs.2005.10.035
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:33645035350
SN - 0022-3697
VL - 67
SP - 428
EP - 430
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 1-3
ER -