There are few studies that have tried to relate human/intellectual capital with financial performance of the company e.g.Chen, M. C., Cheng, S. J., & Hwang, Y. (2005). An empirical investigation of the relationship between intellectual capital and firms' market value and financial performance. Journal of intellectual capital, 6(2), 159-176.
The Impact of Human Resource Management Practices on Turnover, Productivity, and Corporate Financial Performance
Mark A. Huselid, The Academy of Management Journal
Could use some clarification. Do you mean HR in the Financial sector, or HR and Finance as field of research? In the latter case, there are some pieces written from a critical perspective connection HR-practices to a focus on shareholder value. A good starting point would be Paul Thompson's 'Disconnected Capitalism. Why employers can't keep their side of the bargain', published in Work, Employment and Society 2003, I think.
I think you could also find intersections in the broader literature on financialization, e.g. Greta Krippner, Karel Williams, etc.
There is another angle to the HR and Finance which involves Human Resource Accounting. This term treats the human resource not as expensive salary earners, but looks at it as asset of the organisation. The salary paid is not expense, but it is like depreciation of an asset. There are few models in this regard also.
Marketing and human resources aren't as separate as you might think. A company needs to attract profitable customers to achieve decent sales numbers, but getting top talent interested in your company is also critical to long-term success. Whenever you're trying to convince people to help you, whether you're after their dollars or their working hours, you need to position and market your proposition so it looks attractive.