Quasiparticle interference on cubic perovskite oxide surfaces
Yoshinori Okada, Tay-Rong Chang, Guoqing Chang, Ryota Shimizu,, Shiue-Yuan Shiau, Horng-Tay Jeng, Susumu Shiraki, Arun Bansil, Hsin Lin, Taro, Hitosugi
TL;DR
This study reports the first observation of coherent surface states on cubic perovskite oxide SrVO3(001) surfaces using spectroscopic imaging STM, linking interference patterns to a dxy-derived surface state and highlighting the role of apical oxygens.
Contribution
It provides the first experimental visualization of surface states on SrVO3(001) and elucidates the atomic-scale mechanisms influencing these states.
Findings
Observation of coherent surface states on SrVO3(001)
Identification of a dxy-derived surface state
Role of apical oxygens in spectral weight control
Abstract
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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