title: Observation of a Charge Density Wave Incommensuration Near the Superconducting Dome in Cu_{x}TiSe_{2}.
abstract: X-ray diffraction was employed to study the evolution of the charge density wave (CDW) in Cu_{x}TiSe_{2} as a function of copper intercalation in order to clarify the relationship between the CDW and superconductivity. The results show a CDW incommensuration arising at an intercalation value coincident with the onset of superconductivity at around x=0.055(5). Additionally, it was found that the charge density wave persists to higher intercalant concentrations than previously assumed, demonstrating that the CDW does not terminate inside the superconducting dome. A charge density wave peak was observed in samples up to x=0.091(6), the highest copper concentration examined in this study. The phase diagram established in this work suggests that charge density wave incommensuration may play a role in the formation of the superconducting state.
authors.affiliation: Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA.|Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: A
authors.initials: A
authors.lastname: Kogar
authors.affiliation: Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA.
authors.forename: G A
authors.initials: GA
authors.lastname: de la Pena
authors.affiliation: Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA.
authors.forename: Sangjun
authors.initials: S
authors.lastname: Lee
authors.affiliation: Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Fang
authors.affiliation: Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA.
authors.forename: S X-L
authors.initials: SX
authors.lastname: Sun
authors.affiliation: Department of Physics, Drexel University, Philadelphia, Pennsylvania 19104, USA.
authors.forename: D B
authors.initials: DB
authors.lastname: Lioi
authors.affiliation: Department of Physics, Drexel University, Philadelphia, Pennsylvania 19104, USA.
authors.forename: G
authors.initials: G
authors.lastname: Karapetrov
authors.affiliation: Cornell High Energy Synchrotron Source, Cornell University, Ithaca, New York 14853, USA.
authors.forename: K D
authors.initials: KD
authors.lastname: Finkelstein
authors.affiliation: Cornell High Energy Synchrotron Source, Cornell University, Ithaca, New York 14853, USA.
authors.forename: J P C
authors.initials: JP
authors.lastname: Ruff
authors.affiliation: Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, USA.
authors.forename: P
authors.initials: P
authors.lastname: Abbamonte
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: S
authors.initials: S
authors.lastname: Rosenkranz