When navigating into a new research field, it is important to identify papers with greatest impact and prominent authors which we can refer to. This work is motivated by the need to identify key authors in research fields. Traditional indices such as h-index only show the overall performance of an author. However, researchers generally contribute to more than one fields of research in their career, which makes it impractical to use h-index for identifying a key researcher in a research field. In this paper we propose a new PageRank-based scheme named “AuthorRank” for identifying key researchers in a specific field. We show that the proposed ranking system performs better than h-index does.