title: Superconductivity in a new layered bismuth oxyselenide: LaO(0.5)F(0.5)BiSe₂.
abstract: We report superconductivity at T(c) ≈ 2.6 K in a new layered bismuth oxyselenide LaO(0.5)F(0.5)BiSe2 with the ZrCuSiAs-type structure composed of alternating superconducting BiSe2 and blocking LaO layers. The superconducting properties of LaO(0.5)F(0.5)BiSe2 were investigated by means of dc magnetization, resistivity and muon-spin rotation experiments, revealing the appearance of bulk superconductivity with a rather large superconducting volume fraction of ≈ 70% at 1.8 K.
authors.affiliation: Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Krzton-Maziopa
authors.forename: Z
authors.initials: Z
authors.lastname: Guguchia
authors.forename: E
authors.initials: E
authors.lastname: Pomjakushina
authors.forename: V
authors.initials: V
authors.lastname: Pomjakushin
authors.forename: R
authors.initials: R
authors.lastname: Khasanov
authors.forename: H
authors.initials: H
authors.lastname: Luetkens
authors.forename: P K
authors.initials: PK
authors.lastname: Biswas
authors.forename: A
authors.initials: A
authors.lastname: Amato
authors.forename: H
authors.initials: H
authors.lastname: Keller
authors.forename: K
authors.initials: K
authors.lastname: Conder
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D004553:Electric Conductivity; D005459:Fluorides / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry*; D015394:Molecular Structure; D010087:Oxides / Q000737:chemistry*; D018036:Selenium Compounds / Q000737:chemistry*
chemical_list: D010087:Oxides; D018036:Selenium Compounds; C103829:lanthanum oxide; D007811:Lanthanum; D005459:Fluorides; D001729:Bismuth