Abstract
We have measured the electronic term γ(T) ( C el/T) of La 1.85Sr 0.15Cu 1−yZn yO 4 for 0≤y≤0.024 from 1.8K to 300K using a differential technique, and find broad agreement with the theory of Sun and Maki for d-wave superconductivity suppressed by strong potential scattering [1]. The initial T-dependence changes from γ= γ(0)+ αT for y=0 ( α=0.023±0.002 mJ/g-at.K 3) to γ= γ(0)+ ϵT 2 for Zn doped samples ( ϵ∼0.013 mJ/g-at.K 4). The ratio 2 Δ(0)/k BT c=8.1 reflects strong coupling and we show that the critical Zn concentrations y c=0.025 agrees with the value predicted from γ n Δ(0) but not from γ nT c. Contrary to theory γ(0) exceeds γ n for y ∼ y c and the entropy above T c increases with y, possibly due to the influence of Zn doping on the normal state pseudogap.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
