This depends on the copyright rules of the specific journal. See https://help.researchgate.net/hc/en-us/articles/14846037644817-Copyright-and-ResearchGate for more information.
I agree with Dr Wolfgang R. Dick that this is a very sensitive topic and you have to be careful with copyright laws. This will vary with different publishers and in different countries so you need to check comprehensively.
Whether an author has the right to upload the full text of their papers that have been published in journals depends on several factors, primarily the copyright agreement they signed with the journal publisher. Here are some common scenarios:
Retained Copyright: If the author retained the copyright when publishing the paper, they generally have more freedom to share their work, including uploading it to personal or institutional repositories.
Publisher’s Policies: Many publishers allow authors to share their work under certain conditions. These policies vary widely and might include:Pre-print Sharing: Authors can often share the pre-peer-reviewed version of their manuscript (pre-print) on personal websites or institutional repositories. Post-print Sharing: Some publishers permit sharing the accepted version after peer review but before final typesetting (post-print). This is often subject to an embargo period. Publisher’s Version: Sharing the final published version (PDF from the journal) is usually the most restricted. Some publishers do not allow this at all outside of their platform, while others may allow it with restrictions or after an embargo period.
Open Access Agreements: If the paper was published under an open access license (such as Creative Commons), the author generally has more flexibility to share the full text immediately and widely.
Institutional and Funder Policies: Some institutions and research funders have policies requiring or encouraging open access. This might influence the author's rights and responsibilities regarding sharing their work.
Specific Publisher Agreements: Authors should always review the specific terms of the copyright agreement they signed with the publisher. These agreements will detail what is permissible in terms of sharing and distributing the published work.
For accurate guidance, authors should check:
The specific journal’s or publisher’s copyright policy.
Their signed publication agreement.
Institutional or funder open access mandates.
In summary, the right to upload the full text of published papers is not universally granted and depends heavily on the terms agreed upon at the time of publication. Authors should carefully review their publication agreements and publisher policies to understand their rights.