Chai Hok EabI. Ming TangChulalongkorn UniversityMahidol University2018-06-142018-06-141989-01-02Physics Letters A. Vol.134, No.4 (1989), 253-256037596012-s2.0-0041918750https://repository.li.mahidol.ac.th/handle/20.500.14594/15884Expressions for the transition temperatures of multilayer superconductors such as the recently discovered high T c bismuth and thallium superconductors are obtained within the framework of a Ginzburg-Landau approach. Using the values of the T c 's of the one-and two-layer superconductors, the T c 's of the compounds having higher number of layers are calculated. The predicted value for the three-layer thallium superconductor is in agreement with the observed T c . It is seen that there is an upper limit to the T c 's which can be achieved by inserting additional CuO/Ca double layers into each superconducting series. © 1989.Mahidol UniversityPhysics and AstronomyArticleSCOPUS10.1016/0375-9601(89)90405-2