Key databases of research in Physics are:
Archives, subject repositories, e-print servers and institutional repositories are addtional sources of full-text articles and other publications.
Some examles: Astronomical Data Service (ADS), arXiv, CDS - National Chemistry Database Service, ChemSpider, CERN Articles & Preprints,
HEP- High Energy Physics databases, Europe PMC, PubMed Central ...
See the Finding full-text articles tab for further information.