Manifestations of Broken Symmetry: The Surface Phases of Ca(2-x)Sr(x)RuO4

Abstract

The surface structural phases of Ca(2-x)Sr(x)RuO(4) are investigated using quantitative Low Energy Electron Diffraction. The broken symmetry at the surface enhances the structural instability against the RuO6 rotational distortion while diminishing the instability against the RuO6 tilt distortion occurring within the bulk crystal. As a result, suppressed structural and electronic surface phase transition temperatures are observed, including the appearance of an inherent Mott metal-to-insulator transition for x = 0.1 and possible modifications of the surface quantum critical point near xc ~ 0.5.

4 pages, 4 figures

References in corpus (1)

• Subband filling and Mott transition in Ca_{2-x}Sr_xRuO_4

Cited by in corpus (4)

• Hidden Phases Revealed at the Surface of Double-Layered Sr3(Ru1-xMnx)2O7
• Emergence of low-energy electronic states in oxygen-controlled Mott insulator Ca${}_2$RuO${}_{4+\delta }$
• Microscopic calculation of the phonon dynamics of Sr${}_2$RuO${}_4$ compared with La${}_2$CuO${}_4$
• Anomalous Fermi pockets on Hund's metal surface of Sr2RuO4 induced by the correlation-enhanced spin-orbit coupling