In Pandoc, how do I add a newline between authors through the YAML metablock without modifying the template?

I am trying to add a a couple of authors to a report I am writing. Preferably, the second author would appear on a new line after the first. I know I can modify the template to add a new field or the multiple author example given in the Pandoc readme. However, I wonder if there is any character I can use to insert a new line between authors directly in the metablock. So far I have tried \newline, \\, | with newline and space, <br>, <div></div>, and making the author list a string with newline or double spaces between author names, but nothing has worked. My desired output is pdf.

via Chebli Mohamed