title: Growth of Na-doped Ca(2)CuO(2)Cl(2) single crystals under high pressures of several GPa.
abstract: Single crystals of Na-doped Ca(2)CuO(2)Cl(2) have been grown for the first time by a flux method under high pressures of up to 5.5 GPa. By changing the Na-solubility limit through the applied pressure, the Na content x was successfully controlled without introducing appreciable compositional inhomogeneity within the millimeter-sized crystals. Structural and chemical characterization indicated that the crystals span the phase diagram continuously from the parent antiferromagnetic insulator to an underdoped high-temperature superconductor. Because of the well-defined cleavage plane and resulting high surface quality, these oxychloride single crystals will provide a unique opportunity to explore the electronic evolution of the high-temperature superconductors, using spectroscopic techniques such as scanning tunneling microscopy/spectroscopy and angle-resolved photoemission spectroscopy.
authors.affiliation: Department of Advanced Materials Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. kk17106@mail.ecc.u-tokyo.ac.jp
authors.forename: Yuhki
authors.initials: Y
authors.lastname: Kohsaka
authors.forename: Masaki
authors.initials: M
authors.lastname: Azuma
authors.forename: Ikuya
authors.initials: I
authors.lastname: Yamada
authors.forename: Takao
authors.initials: T
authors.lastname: Sasagawa
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Hanaguri
authors.forename: Mikio
authors.initials: M
authors.lastname: Takano
authors.forename: Hidenori
authors.initials: H
authors.lastname: Takagi