title: Tuning High-Tc Superconductors via Multistage Intercalation.
abstract: Multistage intercalation has been used to tune the interaction between adjacent blocks of CuO(2) sheets in the bigh-T(c) (high superconducting transition temperature) superconductor Bi(2)Sr(2)CaCu(2)Ox. As revealed by atomic-resolution transmission electron microscopy images, foreign iodine atoms are intercalated into every nth BiO bilayer of the host crystal, resulting in structures of stoichiometry IBi2nSr2nCanCu2nOx with stage index n up to 4. An expansion of 3.6 angstroms for each intercalated BiO bilayer decouples the CuO(2) sheets in adjacent blocks. A comparison of the superconducting transition temperatures of the pristine host material and intercalated compounds of different stages suggests that the coupling between each pair of adjacent blocks contributes approximately 5 K to T(c) in Bi(2)Sr(2)CaCu(2)Ox.
authors.forename: X D
authors.initials: XD
authors.lastname: Xiang
authors.forename: W A
authors.initials: WA
authors.lastname: Vareka
authors.forename: A
authors.initials: A
authors.lastname: Zettl
authors.forename: J L
authors.initials: JL
authors.lastname: Corkill
authors.forename: T W
authors.initials: TW
authors.lastname: Barbee
authors.forename: M L
authors.initials: ML
authors.lastname: Cohen
authors.forename: N
authors.initials: N
authors.lastname: Kijima
authors.forename: R
authors.initials: R
authors.lastname: Gronsky