Abstract
The specific heat of a melted-textured-growth (MTG)YBa2Cu2.99Li0.01Ox crystal has been measured from 1.8 to 30 K in different fields up to 9 T parallel to thec-axis by the thermal relaxation technique. The defects induced by Li-doping and the paramagneticcentres have a strong effect on the low-temperature specific heat. The electronic specific heatCe(T,H)/T at lowertemperatures (T<5 K) follows αT at 0 T and AH1/2 in the magnetic field, and can be scaled on a line,Ce(T,H)/TH1/2 = F(T/H1/2). These results are consistent with that of the d-wave superconductorpredicted theoretically by Volovik, indicating that a Li-dopedMTG-YBa2Cu2.99Li0.01Ox crystal should be a d-wave superconductor.
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