In-plane optical response of Bi2Sr2CuO6
Abstract
We report on infrared reflectivity measurements of the ab-plane response of superconducting Bi2Sr2CuO6 single crystals. The frequency dependent conductivity has a maximum near 700 cm-1 at room temperature, which shifts to lower frequency and merges with a Drude-peak below 100 K. We attribute the unusual behaviour of the mid-infrared conductivity to low frequency transitions between electronic bands of mainly BiO character near the M point. The linear temperature dependence of the low-frequency resistivity can be followed down to approximately 40 K where it saturates.
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