title: Observation of a three-dimensional quasi-long-range electronic supermodulation in YBa2Cu3O(7-x)/La0.7Ca0.3MnO3 heterostructures.
abstract: Recent developments in high-temperature superconductivity highlight a generic tendency of the cuprates to develop competing electronic (charge) supermodulations. While coupled with the lattice and showing different characteristics in different materials, these supermodulations themselves are generally conceived to be quasi-two-dimensional, residing mainly in individual CuO2 planes, and poorly correlated along the c axis. Here we observed with resonant elastic X-ray scattering a distinct type of electronic supermodulation in YBa2Cu3O(7-x) (YBCO) thin films grown epitaxially on La0.7Ca0.3MnO3 (LCMO). This supermodulation has a periodicity nearly commensurate with four lattice constants in-plane, eight out of plane, with long correlation lengths in three dimensions. It sets in far above the superconducting transition temperature and competes with superconductivity below this temperature for electronic states predominantly in the CuO2 plane. Our finding sheds light on the nature of charge ordering in cuprates as well as a reported long-range proximity effect between superconductivity and ferromagnetism in YBCO/LCMO heterostructures.
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA.
authors.forename: Junfeng
authors.initials: J
authors.lastname: He
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Padraic
authors.initials: P
authors.lastname: Shafer
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA.
authors.forename: Thomas R
authors.initials: TR
authors.lastname: Mion
authors.affiliation: Institute of Physics, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Thanh Tra
authors.initials: TT
authors.lastname: Vu
authors.affiliation: Department of Physics, Durham University, Durham DH13LE, UK.
authors.forename: Qing
authors.initials: Q
authors.lastname: He
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA.
authors.forename: J
authors.initials: J
authors.lastname: Kong
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Y-D
authors.initials: YD
authors.lastname: Chuang
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: W L
authors.initials: WL
authors.lastname: Yang
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Graf
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.|Institute of Physics, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: J-Y
authors.initials: JY
authors.lastname: Lin
authors.affiliation: Institute of Physics, Academia Sinica, Taipei 11529, Taiwan.|Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.
authors.forename: Y-H
authors.initials: YH
authors.lastname: Chu
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: E
authors.initials: E
authors.lastname: Arenholz
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA.
authors.forename: Rui-Hua
authors.initials: RH
authors.lastname: He
mesh_terms: D003300:Copper / Q000737:chemistry; D004553:Electric Conductivity; D055664:Electrochemical Techniques; D028581:Lanthanoid Series Elements / Q000737:chemistry*; D060328:Magnetic Phenomena; D014961:X-Ray Diffraction; D015019:Yttrium / Q000737:chemistry
chemical_list: D028581:Lanthanoid Series Elements; D015019:Yttrium; D003300:Copper; C030973:cupric oxide