1 Erratum to: J Comput Electron (2014) 13:1026–1032 DOI 10.1007/s10825-014-0626-4

The following portion of text is missing after the word “\(a_{x}\)” in the next to last line of the left-hand column of p. 1027 of this article:

$$a_\mathrm{x} = {a}*\sqrt{3/2}$$