Stable single-atom contacts of zinc whiskers

Konrad, P.; Bacca, C.; Scheer, E.; Brenner, P.; Mayer-Gindner, A.; Löhneysen, H. v.
May 2005
Applied Physics Letters;5/23/2005, Vol. 86 Issue 21, p213115
Academic Journal
We report low-temperature measurements of the electrical transport properties of single-atom and tunnel contacts of Zn. We present a variant of the mechanically controllable break-junction technique that comprises a whisker as the central part. This technique combines the possibility to fabricate reproducibly single-atom contacts and well-characterized electronic and lattice properties of the electrodes. From tunneling current-voltage characteristics, we deduce a well-pronounced quasiparticle spectrum for whiskers, while for standard “notched-wire” and thin-film break junctions the spectrum is smeared out.


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