Anomalous negative resistance in superconducting vanadium nanowires
J. Jorritsma, J. A. Mydosh
DOI 10.1103/PhysRevB.62.9703 · Physical Review B
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Abstract
Low-temperature electrical transport measurements were performed on large arrays of 150-nm-wide superconducting vanadium (V) wires covered with either a thin layer of Au (V/Au) or Fe (V/Fe). The measurements were conducted using various electrical contact geometries. Our results show that a particular arrangement of the electrical contacts in combination with the superconducting proximity effect can result in a pronounced “negative resistance” anomaly below the resistive transition. We demonstrate that this “negative resistance” can be clearly reproduced by constructing resistor circuits based upon the particular contact arrangement.
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