In-situ lego-like construction of Ruddelsden-Popper surfaces using octahedra building blocks.

ORAL

Abstract

The surface of Ruddelsden-Popper (RP) ruthenates provides a rich playground to study the emergent phenomena originating from the coupling of lattice, charge and spin, mediated through RuO6 octahedron network. Because of the octahedra rotation, Sr2RuO4 surface shows a (√2 ×√2)R45° reconstruction. In addition to enhanced bulk-like octahedral rotation, Sr3Ru2O7 surface displays octahedral tilt as well. In this work, using ultra-high-vacuum cleaved surface of Sr2RuO4 as a platform, we have sequentially grown different number of SrRuO3 unit cells (u.c.) thin films, to mimic progression of “surface layer/s” of Sr2RuO4 to those of higher RP ruthenates (i.e. one u.c. is equivalent to Sr3Ru2O7, two u.c. for Sr4Ru3O10 surface and so on). Combining low energy electron diffraction with transmission electron microscopy, we systematically study the evolution of the lattice structure and discuss their properties.

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Presenters

  • Prahald Siwakoti

    Department of Physics and Astronomy, Baton Rouge, Louisiana 70803, US, Louisiana State University

Authors

  • Prahald Siwakoti

    Department of Physics and Astronomy, Baton Rouge, Louisiana 70803, US, Louisiana State University

  • Mohammad Saghayezhian

    Department of Physics and Astronomy, Baton Rouge, Louisiana 70803, US, Louisiana State University, Louisiana State University, Department of Physics & Astronomy, Louisiana State University, Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Physics and astronomy, Louisiana State University

  • Zhen Wang

    Department of Physics and Astronomy, Baton Rouge, Louisiana 70803, US, Louisiana State University, Louisiana State University

  • Yimei Zhu

    Department of Energy Science and Technology, Upton, New York 11973, USA, Brookehaven National Laboratory, Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory, Brookhaven National Laboratory, CMPMSD, Brookhaven National Laboratory, 2Condensed Matter Physics and Materials Science Departement, Brookhaven National Laboratory

  • Rosalba Fittipaldi

    CNR-SPIN Unità di Salerno and Dipartimento di Fisica “E.R. Caianiello”, I-84084 Fisciano, Salerno, Italy, Università di Salerno

  • Antonio Vecchione

    CNR-SPIN Unità di Salerno and Dipartimento di Fisica “E.R. Caianiello”, I-84084 Fisciano, Salerno, Italy, Università di Salerno

  • Jiandi Zhang

    Department of Physics and Astronomy, Baton Rouge, Louisiana 70803, US, Louisiana State University, Louisiana State University, Department of Physics & Astronomy, Louisiana State University, Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Physics and astronomy, Louisiana State University