Magnetic field effects on total and partial conductance histograms in Cu and Ni nanowires

摘要: Conductance histograms have become a powerful tool for studying transport properties of metallic nanowires. However, the individual conductance curves display very rich structure that might be concealed by statistical procedure finding preferred values building occurrence using consecutive nanocontact breakage experiments. This is particularly true when it comes to discerning 1/2G0=e2/hquantization in magnetic The effect disorder, added possible sources scattering, and different states nanowires, hide its appearance as histogram peaks. work analyzes compares Ni Cu nanowire experimental at room temperature (RT). Those obtained with no curve selection criteria are basically unaffected presence field. A particular sets shows quantization could occur steps e2/h 2e2/h well or absence Sorting out present plateaus half integer values, compiling statistics on number such appear, depending applied field, results differences between behaviour Ni. While Cu, field keeps ratio 1/2G0with respect those presenting G0 unchanged; Ni, which exhibit just almost disappears fact indicate removes spin degeneracy these