title: Perturbing the superconducting planes in CeCoIn5 by Sn substitution.
abstract: In contrast to substitution on the Co or Ce site, Sn substitution has a remarkably strong effect on superconductivity in CeCoIn5-xSnx, with Tc-->0 beyond only 3.6% Sn. Instead of being randomly distributed on in-plane and out-of-plane In sites, extended x-ray absorption fine structure measurements show the Sn atoms preferentially substitute within the Ce-In plane. This result highlights the importance of the In1 site to impurity scattering and clearly demonstrates the two-dimensional nature of superconductivity in CeCoIn5.
authors.affiliation: Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: M
authors.initials: M
authors.lastname: Daniel
authors.forename: E D
authors.initials: ED
authors.lastname: Bauer
authors.forename: S-W
authors.initials: SW
authors.lastname: Han
authors.forename: C H
authors.initials: CH
authors.lastname: Booth
authors.forename: A L
authors.initials: AL
authors.lastname: Cornelius
authors.forename: P G
authors.initials: PG
authors.lastname: Pagliuso
authors.forename: J L
authors.initials: JL
authors.lastname: Sarrao