We have studied how the phase diagram of the Bi2Sr2-xRxCuOy system depends on the rare earth element R. The angle-resolved photoemission spectroscopy (ARPES) measurement revealed that the pseudogap is larger for the R = Eu sample than the R = La sample when compared at the same carrier concentration while the transition temperature Tc of the R = La sample is larger. This implies that changing the R element to one with a smaller ionic radius stabilizes the pseudogap phase and suppresses at the same time the high-Tc superconducting phase.
- Phase diagram
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering