摘要: We present measurements of the electrical conductance through breaking point contacts in commercial and home-built electromechanical relays under ambient conditions. Inspired by an experiment published Costa-Kr\"amer et al. [Surf. Sci. 342, L1144 (1995)], we constructed automated setup, which makes it possible to record a contact 25 000 times during 24 h. Quantization units ${G}_{0}{=2e}^{2}/h$ is shown be intimately correlated with choice material experimental This previous studies clearly demonstrate that Au benchmark system, exhibits quantized independent Peaks histogram are asymmetric, interpreted as another indicator quantization. For more reactive metals Ag Cu, quantization also observed, but not Au. In contrast, find no evidence number transition metals. It tentatively suggested presence and/or absence impurities nanowires. Other deviations from perfect discussed. revealed how differential nonlinearity analog-to-digital converters introduces significant noise corresponding histograms unless proper compensation made.
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sci-hub.se 参考文章(39)
Instrumentation in applied nuclear chemistry Plenum Press. ,(1973) , 10.1007/978-1-4684-1953-5
M. Büttiker, Y. Imry, R. Landauer, S. Pinhas, Generalized many-channel conductance formula with application to small rings. Physical Review B. ,vol. 31, pp. 6207- 6215 ,(1985) , 10.1103/PHYSREVB.31.6207
M. Buttiker, Coherent and sequential tunneling in series barriers Ibm Journal of Research and Development. ,vol. 32, pp. 63- 75 ,(1988) , 10.1147/RD.321.0063
JA Torres, JI Pascual, JJ Sáenz, None, Theory of conduction through narrow constrictions in a three-dimensional electron gas. Physical Review B. ,vol. 49, pp. 16581- 16584 ,(1994) , 10.1103/PHYSREVB.49.16581
M. Brandbyge, J. Schio/tz, M. R. So/rensen, P. Stoltze, K. W. Jacobsen, J. K. No/rskov, L. Olesen, E. Laegsgaard, I. Stensgaard, F. Besenbacher, Quantized conductance in atom-sized wires between two metals Physical Review B. ,vol. 52, pp. 8499- 8514 ,(1995) , 10.1103/PHYSREVB.52.8499
Mads Brandbyge, Karsten W. Jacobsen, Jens K. Nørskov, Scattering and conductance quantization in three-dimensional metal nanocontacts Physical Review B. ,vol. 55, pp. 2637- 2650 ,(1997) , 10.1103/PHYSREVB.55.2637
D A Wharam, T J Thornton, R Newbury, M Pepper, H Ahmed, J E F Frost, D G Hasko, D C Peacock, D A Ritchie, G A C Jones, One-dimensional transport and the quantisation of the ballistic resistance Journal of Physics C: Solid State Physics. ,vol. 21, ,(1988) , 10.1088/0022-3719/21/8/002
B. J. van Wees, H. van Houten, C. W. J. Beenakker, J. G. Williamson, L. P. Kouwenhoven, D. van der Marel, C. T. Foxon, Quantized conductance of point contacts in a two-dimensional electron gas. Physical Review Letters. ,vol. 60, pp. 848- 850 ,(1988) , 10.1103/PHYSREVLETT.60.848
JM Krans, CJ Muller, N Van der Post, FR Postma, AP Sutton, TN Todorov, JM Van Ruitenbeek, None, Comment on "Quantized conductance in an atom-sized point contact" Physical Review Letters. ,vol. 74, pp. 2146- 2146 ,(1995) , 10.1103/PHYSREVLETT.74.2146
L. Olesen, E. Laegsgaard, I. Stensgaard, F. Besenbacher, J. Schiøtz, P. Stoltze, K. W. Jacobsen, J. K. Nørskov, Olesen et al. reply. Physical Review Letters. ,vol. 74, pp. 2147- 2147 ,(1995) , 10.1103/PHYSREVLETT.74.2147