Abstract
We present the optical response of K3C60 and Rb3C60 single crystals in their normal and superconducting phase. Above Tc the optical conductivity is characterized by two components: a Drude one due to the free charge carriers and a mid-infrared absorption. Below Tc the data clearly indicates a superconducting gap in agreement with the weak coupling limit of the BCS theory, suggesting furthermore that high frequency intramolecular phonon modes are relevant for the pairing mechanism.
Original language | English |
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Pages (from-to) | 1325-1327 |
Number of pages | 3 |
Journal | Synthetic Metals |
Volume | 70 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 15 Mar 1995 |
Externally published | Yes |