TY - JOUR
T1 - Doping dependence of the order parameter symmetry in Y0.8Ca0.2Ba2Cu3O7.δ
AU - Kohen, A.
AU - Dagan, Y.
AU - Deutscher, G.
N1 - Funding Information:
This work was supported in part by the Oren Family Chair of Experimental Solid State Physics and by the Heinrich Hertz Minerva Center for Superconductivity.
PY - 2000
Y1 - 2000
N2 - We have studied planar tunneling and Point Contact (PC) measurements on overdoped, [110] oriented, Y0.8Ca0.2Ba2Cu3O7.δ (YCBCO) films. PC measurements show a clear Andreev characteristics with a dip at zero bias. Tunneling contacts on the same samples show a sub gap of about 3 mV and a Gap Like Feature (GLF) at 12 mV. No Zero Bias Conductance Peak (ZBCP) is seen in any of our measurements. This reflects the absence of bound states, indicating that the order parameter cannot have the pure dx2-y2 symmetry. The overall data is best described by a dx2-y2+idxy Order Parameter (OP).
AB - We have studied planar tunneling and Point Contact (PC) measurements on overdoped, [110] oriented, Y0.8Ca0.2Ba2Cu3O7.δ (YCBCO) films. PC measurements show a clear Andreev characteristics with a dip at zero bias. Tunneling contacts on the same samples show a sub gap of about 3 mV and a Gap Like Feature (GLF) at 12 mV. No Zero Bias Conductance Peak (ZBCP) is seen in any of our measurements. This reflects the absence of bound states, indicating that the order parameter cannot have the pure dx2-y2 symmetry. The overall data is best described by a dx2-y2+idxy Order Parameter (OP).
UR - http://www.scopus.com/inward/record.url?scp=0342962156&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(00)00651-1
DO - 10.1016/S0921-4534(00)00651-1
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AN - SCOPUS:0342962156
SN - 0921-4534
VL - 341-348
SP - 687
EP - 688
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - PART 1
ER -