Angle-resolved photoemission spectroscopy (ARPES) has been performed on the single- to triple-layered Bi-family high-[Formula presented] superconductors ([Formula presented], [Formula presented]). We found a sharp coherent peak as well as a pseudogap at the Fermi level in the triple-layered compound. Comparison among three compounds has revealed a universal rule that the characteristic energies of superconducting and pseudogap behaviors are scaled with the maximum [Formula presented].
ASJC Scopus subject areas
- Physics and Astronomy(all)