For the Neo-Elamite kingdom and its capital, Susa, see here. I have mentioned other Neo-Elamite inscriptions here, here and here.
The article also has a discussion of the inscriptions found at the Persepolis Fortification and the Persepolis Treasury, although it does not mention the Aramaic material. (Persepolis was the ceremonial royal capital of the Achemenid Empire.) For more on the Persepolis Fortification Archives, see here and many links. And for many PaleoJudaica posts on Persepolis, start here and follow the links.
Visit PaleoJudaica daily for the latest news on ancient Judaism and the biblical world.