Microcontact spectroscopy of the CeCu2Si2 Kondo lattice
Neidyuk Yu. G., Grivbov N. N., Lysykh A. A., Yanson I. K., Brandt N. B., Moshchalkov V. V.
The strong electron-electron interaction causes current flow in a thermal regime in CeCu2Si2 microcontacts. The conductivity of CeCu2Si2-Cu heterocontacts is found to be asymmetric with respect to the current direction. This asymmetry is attributed to a resonance in the CeCu2Si2 state density near the Fermi level.