The following databases index journal articles across various disciplines. By entering your search terms, you can find out what scholarly articles have peen published on a topic or by a particular author.
arXiv is a repository of electronic preprints (also known as e-prints) of scientific papers in mathematics, physics, astronomy, computer science, quantitative biology, statistics, and quantitative finance.
PROLA provides full access to the APS journal collection dating back to the first volume of each journal (as early as 1893). PROLA gives access to all journal content, except for the current year and the preceding three years.
From the American Institute of Physics (AIP), Scitation provides an interface for the SPIN (Searchable Physics Information Notices) database. This allows for searching and browsing of articles from major physics, astronomy, and engineering journals. Also includes conference proceedings, preprints, and even MedLine as one of the searchable collections. Scitation publications contain forward links to articles that cite it, links to related articles, errata, editorials commentaries and author-supplied supplementary material which can include multimedia.
IOPscience from the Institute of Physics, includes ALL IOP published content back to 1874. Also included are 6 journals published by Turpion, a publisher that covers the Russian physics literature in translation. The fields covered include physics, mathematics, engineering, chemistry and biology. A useful journal collection with worldwide coverage of the literature. Document types retrieved include journal articles, eprints (advanced online and arXiv articles) and news & events.