hi Swetccha
well done! this is great news. My opinion is that it is ok for the interviewers to see your write-ups, I assume you are referring to your submitted article. However, since you have co-authors, they should be informed, that you are showing the article to the interviewers. In other words, all authors should consent to having the article read (by the interviewers). I don't think you will have a problem with this! All sounds very positive!
A submitted article is a good thing to show, even if it is not published yet. It is shorter than a thesis chapter (although thesis chapters are great as well!!!)--and kind of gives an overview of your work!
I hope you get the job!
love satchi