Peculiarities of carrier scattering at the boundary of a normal metal and a quasi-one-dimensional conductor with a charge-density wave

Nonlinear effects at the interface between a normal metal and the quasi-one-dimensional conductor with a charge-density wave K 0.3 MoO 3 are investigated experimentally. It is found that the scattering of the normal carriers with energy E less than the Peierls gap Δ p gives rise to an excess resistance of the N-CDW boundary. The character of the scattering is similar to Andreev reflection. In contrast to superconductors, however, the sign of the charge of the reflected particle does not change.