On the Phenomenology of the Infrared Properties of the Copper-oxide Superconductors
نویسندگان
چکیده
The temperature dependent infrared conductivities of Bi,Sr,CaCu,O, (T, N 82 K) and BiZSrZCuO, (T, 6 5 K) are compared with non-Fermi liquid approaches to the normal state of the high T, superconductors. We find reasonable agreement with our data only for o 5 0.12 eV. We attribute the remaining spectral weight to a low-energy excitation in copper-oxide superconductors doped well above the metal-insulator transition.
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