Pristáš, G., Reiffers, M., Bauer, E., Jansen, A. G. M., & Maude, D. K. (2008). Suppression of asymmetric differential resistance in the non-Fermi-liquid system YbCu₅₋ₓAlₓ (x=1.3-1.75) in high magnetic fields. Physical Review B, 78(235108). https://doi.org/10.1103/physrevb.78.235108
E138-03 - Forschungsbereich Functional and Magnetic Materials
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Journal:
Physical Review B
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ISSN:
2469-9950
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Date (published):
8-Dec-2008
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Number of Pages:
6
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Publisher:
AMER PHYSICAL SOC
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Peer reviewed:
Yes
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Keywords:
Condensed Matter Physics; Electronic, Optical and Magnetic Materials; aluminium alloys; copper alloys; electrical resistivity; magnetic field effects; ytterbium alloys
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Abstract:
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.
