Electronic shell effects and the stability of alkali nanowires
D. F. Urban, J. B\"urki, A. I. Yanson, I. K. Yanson, C. A. Stafford,, J. M. van Ruitenbeek, Hermann Grabert
TL;DR
This paper investigates the stability of alkali nanowires, particularly sodium, by analyzing conductance histograms and comparing them with theoretical models, revealing the correlation between conductance peaks and stable elliptical geometries.
Contribution
It provides a detailed comparison between experimental conductance data and theoretical stability predictions for nanowires, highlighting the role of elliptical cross sections.
Findings
Conductance peaks correspond to stable nanowire geometries.
Many observed nanowires have elliptical cross sections.
The free-electron model accurately predicts stability features.
Abstract
Experimental conductance histograms for Na nanowires are analyzed in detail and compared to recent theoretical results on the stability of cylindrical and elliptical nanowires, using the free-electron model. We find a one-to-one correspondence between the peaks in the histograms and the most stable nanowire geometries, indicating that several of the commonly observed nanowires have elliptical cross sections.
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