Point Contact Spectroscopy on Kondo Lattice Compound CeCu6

The current-voltage characteristics on point contacts of a new Kondo lattice compound CeCu 6 were investigated experimentally at liquid helium temperatures. The spectra of CeCu 6 were decomposed into symmetric and asymmetric parts, and were compared with those of the reference compound LaCu 6 . The asymmetric part shows a sharp step near 2 to 2.5 mV bias voltage, while the symmetric part shows a logarithmic dependence on bias voltage near 10 mV.