[Zurück]

G. Pristás, M. Reiffers, E. Bauer, A. Jansen, D. Maude:
"Suppression of asymmetric differential resistance in the non-Fermi-liquid system YbCu₅−_xAl_x (x=1.3-1.75) in high magnetic fields";
Physical Review B, 78 (2008), S. 235108-1 - 235108-6.

The non-Fermi-liquid system YbCu5−xAlx (x=1.3-1.75) has been investigated in heterocontact as well as homocontact arrangement in magnetic fields up to 22.5 T. The observed differential resistance [dV/dI(V)] characteristics reveal asymmetry in heterocontact arrangement and do not agree with the model of thermal contact heating, at least close to zero-bias voltage. In the case of a heterocontact arrangement we have observed a maximum at only one voltage polarity at about 1.3 mV (for x=1.5) and this asymmetry is suppressed in an applied magnetic field. We show that such behavior is connected with the non-Fermi-liquid state of the studied system.

aluminium alloys, copper alloys, electrical resistivity, magnetic field effects, ytterbium alloys

http://dx.doi.org/10.1103/PhysRevB.78.235108

http://link.aps.org/doi/10.1103/PhysRevB.78.235108