%0 Journal Article %1 horio2023orbitalselective %A Horio, Masafumi %A Forte, Filomena %A Sutter, Denys %A Kim, Minjae %A Fatuzzo, Claudia G. %A Matt, Christian E. %A Moser, Simon %A Wada, Tetsuya %A Granata, Veronica %A Fittipaldi, Rosalba %A Sassa, Yasmine %A Gatti, Gianmarco %A Rønnow, Henrik M. %A Hoesch, Moritz %A Kim, Timur K. %A Jozwiak, Chris %A Bostwick, Aaron %A Rotenberg, Eli %A Matsuda, Iwao %A Georges, Antoine %A Sangiovanni, Giorgio %A Vecchione, Antonio %A Cuoco, Mario %A Chang, Johan %D 2023 %J Commun. Phys. %K a %N 1 %P 323 %R 10.1038/s42005-023-01436-1 %T Orbital-selective metal skin induced by alkali-metal-dosing Mott-insulating Ca$_2$RuO$_2$ %U https://doi.org/10.1038/s42005-023-01436-1 %V 6 %X Doped Mott insulators are the starting point for interesting physics such as high temperature superconductivity and quantum spin liquids. For multi-band Mott insulators, orbital selective ground states have been envisioned. However, orbital selective metals and Mott insulators have been difficult to realize experimentally. Here we demonstrate by photoemission spectroscopy how Ca2RuO4, upon alkali-metal surface doping, develops a single-band metal skin. Our dynamical mean field theory calculations reveal that homogeneous electron doping of Ca2RuO4 results in a multi-band metal. All together, our results provide evidence for an orbital-selective Mott insulator breakdown, which is unachievable via simple electron doping. Supported by a cluster model and cluster perturbation theory calculations, we demonstrate a type of skin metal-insulator transition induced by surface dopants that orbital-selectively hybridize with the bulk Mott state and in turn produce coherent in-gap states.

@article{horio2023orbitalselective, abstract = {Doped Mott insulators are the starting point for interesting physics such as high temperature superconductivity and quantum spin liquids. For multi-band Mott insulators, orbital selective ground states have been envisioned. However, orbital selective metals and Mott insulators have been difficult to realize experimentally. Here we demonstrate by photoemission spectroscopy how Ca2RuO4, upon alkali-metal surface doping, develops a single-band metal skin. Our dynamical mean field theory calculations reveal that homogeneous electron doping of Ca2RuO4 results in a multi-band metal. All together, our results provide evidence for an orbital-selective Mott insulator breakdown, which is unachievable via simple electron doping. Supported by a cluster model and cluster perturbation theory calculations, we demonstrate a type of skin metal-insulator transition induced by surface dopants that orbital-selectively hybridize with the bulk Mott state and in turn produce coherent in-gap states.}, added-at = {2024-03-26T10:26:33.000+0100}, author = {Horio, Masafumi and Forte, Filomena and Sutter, Denys and Kim, Minjae and Fatuzzo, Claudia G. and Matt, Christian E. and Moser, Simon and Wada, Tetsuya and Granata, Veronica and Fittipaldi, Rosalba and Sassa, Yasmine and Gatti, Gianmarco and Rønnow, Henrik M. and Hoesch, Moritz and Kim, Timur K. and Jozwiak, Chris and Bostwick, Aaron and Rotenberg, Eli and Matsuda, Iwao and Georges, Antoine and Sangiovanni, Giorgio and Vecchione, Antonio and Cuoco, Mario and Chang, Johan}, biburl = {https://www.bibsonomy.org/bibtex/222ada07970e034e8e26d858259a96f0c/ctqmat}, day = 06, doi = {10.1038/s42005-023-01436-1}, interhash = {68d9650ef59c22aef8041c6fd5397874}, intrahash = {22ada07970e034e8e26d858259a96f0c}, issn = {23993650}, journal = { Commun. Phys.}, keywords = {a}, month = {11}, number = 1, pages = 323, refid = {Horio2023}, timestamp = {2024-03-26T10:26:33.000+0100}, title = {Orbital-selective metal skin induced by alkali-metal-dosing Mott-insulating Ca$_{\mathbf{2}}$RuO$_{\mathbf{2}}$}, url = {https://doi.org/10.1038/s42005-023-01436-1}, volume = 6, year = 2023 }