This article has an erratum: [erratum]

Issue
EPL
Volume 99, Number 1, July 2012
Article Number 17003
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/99/17003
Published online 10 July 2012

© EPLA, 2012