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Quasiparticle interference on cubic perovskite oxide surfaces

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arxiv 1604.07334 v2 pith:5LLE5JAN submitted 2016-04-25 cond-mat.mtrl-sci cond-mat.str-el

Yoshinori Okada , Tay-Rong Chang , Guoqing Chang , Ryota Shimizu , Shiue-Yuan Shiau , Horng-Tay Jeng , Susumu Shiraki , Arun Bansil
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Hsin Lin Taro Hitosugi
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classification cond-mat.mtrl-scicond-mat.str-el
keywords surfacecoherentcubicinterferenceobservedoxideperovskitestate
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We report the first observation of coherent surface states on cubic perovskite oxide SrVO3(001) thin films through spectroscopic imaging scanning tunneling microscopy. A direct link between the observed atomic-scale interference patterns and the formation of a dxy-derived surface state is supported by first-principles calculations. Furthermore, we show that the apical oxygens on the topmost VO2 plane play a critical role in controlling the spectral weight of the observed coherent surface state.

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