Pairing symmetry and electrodynamics of superconducting YBa{sub 2}Cu{sub 3}O{sub 7-{delta}}, Nd{sub 1.85}Ce{sub 0.15}CuO{sub 4}, and Nb
- Univ. of Maryland, College Park, MD (United States)
We experimentally investigate the pairing symmetry and electrodynamics of YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO), Nd{sub 1.85}Ce{sub 0.15}CuO{sub 4} (NCCO), and Nb by examining the temperature dependence of the penetration depth {lambda} (T) and surface resistance R{sub s}(T) in a comparative manner. Using the measured {lambda}(T) and R{sub s}(T), we extract the complex conductivity {sigma}={sigma}{sub 1}-i{sigma}{sub 2} for each sample, and the quasiparticle scattering time {tau}(T) for the ab-plane and c-axis in YBCO. While NCCO and Nb show a strong resemblance in their electrodynamic properties, the electrodynamic properties of YBCO are very distinctive from the others. The results suggest that NCOO may have a BCS s-wave-like pairing state, while YBCO possibly has an unconventional pairing state. We compare the results on YBCO with the d-wave pairing scenario, as well as with other possible theoretical models.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 272677
- Journal Information:
- Journal of Superconductivity, Vol. 8, Issue 6; Other Information: PBD: Dec 1995
- Country of Publication:
- United States
- Language:
- English
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