title: Superconductivity in the narrow-gap semiconductor CsBi4Te6.
abstract: Superconductivity was discovered in the narrow-gap semiconductor CsBi4Te6. A superconducting transition around 4.4 K was observed for p-type samples in temperature-dependent resistivity and magnetic susceptibility data. Stoichiometric CsBi4Te6 is not a superconductor. A remarkably high critical field of ~10 T was estimated from the field-dependent resistivity data. The strongly anisotropic CsBi4Te6 system is monoclinic and the first member of a larger homologous series Cs4[Bi(2n+4)Te(3n+6)] that exhibits unconventional superconductivity, suggesting that proper doping of the homologous series may create a novel class of superconductors from semiconductors.
authors.affiliation: Materials Science Division, Argonne National Laboratory , Argonne, Illinois 60439, United States.
authors.forename: Christos D
authors.initials: CD
authors.lastname: Malliakas
authors.forename: Duck Young
authors.initials: DY
authors.lastname: Chung
authors.forename: Helmut
authors.initials: H
authors.lastname: Claus
authors.forename: Mercouri G
authors.initials: MG
authors.lastname: Kanatzidis