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- W2014666721 abstract "We present an angle resolved photoemission study of the surface and bulk electronic structure of the single layer ruthenate Sr$_2$RuO$_4$. As the early studies of its electronic structure by photoemission and scanning tunneling microscopy were confronted with a problem of surface reconstruction, surface aging was previously proposed as a possible remedy to access the bulk states. Here we suggest an alternative way by demonstrating that, in the case of Sr$_2$RuO$_4$, circularly polarised light can be used to disentangle the signals from the bulk and surface layers, thus opening the possibility of investigating many-body interactions both in bulk and surface bands. The proposed procedure results in improved momentum resolution, which enabled us to detect an unexpected splitting of the surface $beta$ band. We propose that spin--orbit splitting might be responsible for this, and discuss possible relations of the newly observed surface feature to topological matter." @default.
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- W2014666721 date "2012-06-28" @default.
- W2014666721 modified "2023-09-25" @default.
- W2014666721 title "Surface and bulk electronic structure of the unconventional superconductor Sr<sub>2</sub>RuO<sub>4</sub>: unusual splitting of the<i>β</i>band" @default.
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- W2014666721 doi "https://doi.org/10.1088/1367-2630/14/6/063039" @default.
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