(a) R(T)/RN(20K) ratio for the d180 film at selected temperatures in the THz region. (b) R(6K)/RN(20K) ratio compared with the two-band (2-b) and single-band (1-b) best fit curves. (c) Real part of the optical conductivity in the superconducting state σ 1S (in units 104 Ω−1 cm−1) of V3Si from the 2-b model.
