Manifestations of broken symmetry: The surface phases of Ca2-xSrxRuO4

R. G. Moore; V. B. Nascimento; Jiandi Zhang; J. Rundgren; R. Jin; D. Mandrus; E. W. Plummer

doi:10.1103/PhysRevLett.100.066102

Manifestations of broken symmetry: The surface phases of Ca2-xSrxRuO4

R. G. Moore, V. B. Nascimento, Jiandi Zhang, J. Rundgren, R. Jin, D. Mandrus, E. W. Plummer

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Abstract

The surface structural phases of Ca2-xSrxRuO4 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.

Original language	English
Article number	066102
Journal	Physical Review Letters
Volume	100
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.100.066102
State	Published - Feb 13 2008
Externally published	Yes

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10.1103/PhysRevLett.100.066102

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abstract = "The surface structural phases of Ca2-xSrxRuO4 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.",

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AU - Moore, R. G.

AU - Nascimento, V. B.

AU - Zhang, Jiandi

AU - Rundgren, J.

AU - Jin, R.

AU - Mandrus, D.

AU - Plummer, E. W.

PY - 2008/2/13

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N2 - The surface structural phases of Ca2-xSrxRuO4 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.

AB - The surface structural phases of Ca2-xSrxRuO4 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.

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Manifestations of broken symmetry: The surface phases of Ca2-xSrxRuO4

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