Rights:
© 2011 American Physical Society (APS). This is the accepted version of the following article: Zugarramurdi, A. & Borisov, A. G. & Zabala, N. & Chulkov, E. V. & Puska, Martti J. 2011. Clustering and conductance in breakage of sodium nanowires. Physical Review B. Volume 83, Issue 3. 035402/1-10. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.83.035402, which has been published in final form at http://journals.aps.org/prb/abstract/10.1103/PhysRevB.83.035402.