@article{59c65748c6164f8eadc668b15c19cafc,
title = "Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO 2",
abstract = " The ability to modulate the collective properties of correlated electron systems at their interfaces and surfaces underpins the burgeoning field of “designer” quantum materials. Here, we show how an electronic reconstruction driven by surface polarity mediates a Stoner-like magnetic instability to itinerant ferromagnetism at the Pd-terminated surface of the nonmagnetic delafossite oxide metal PdCoO 2 . Combining angle-resolved photoemission spectroscopy and density-functional theory calculations, we show how this leads to a rich multiband surface electronic structure. We find similar surface state dispersions in PdCrO 2 , suggesting surface ferromagnetism persists in this sister compound despite its bulk antiferromagnetic order.",
keywords = "Angle-resolved photoemission, Delafossite, Electronic reconstruction, Itinerant ferromagnetism, Transition-metal oxide",
author = "Federico Mazzola and Veronika Sunko and Seunghyun Khim and Helge Rosner and Pallavi Kushwaha and Clark, \{Oliver J.\} and Lewis Bawden and Igor Markovi{\'c} and Kim, \{Timur K.\} and Moritz Hoesch and Mackenzie, \{Andrew P.\} and King, \{Phil D.C.\}",
note = "Funding Information: ACKNOWLEDGMENTS. We thank C. Hooley, J. Jung, and J. Lee for useful discussions. We gratefully acknowledge support from the European Research Council (through the QUESTDO project, 714193), the Engineering and Physical Sciences Research Council, United Kingdom (Grant EP/I031014/1), the Royal Society, the Max-Planck Society, and the International Max-Planck Partnership for Measurement and Observation at the Quantum Limit. We thank Diamond Light Source for access to Beamline I05 (Proposals SI12469, SI14927, and SI16262), which contributed to the results presented here. V.S., L.B., and O.J.C. acknowledge the Engineering and Physical Sciences Research Council for PhD studentship support through Grants EP/L015110/1, EP/G03673X/1, and EP/K503162/1, respectively, and I.M. acknowledges studentship support from the International Max-Planck Research School for Chemistry and Physics of Quantum Materials. Funding Information: We thank C. Hooley, J. Jung, and J. Lee for useful discussions. We gratefully acknowledge support from the European Research Council (through the QUESTDO project, 714193), the Engineering and Physical Sciences Research Council, United Kingdom (Grant EP/I031014/1), the Royal Society, the Max-Planck Society, and the International Max-Planck Partnership for Measurement and Observation at the Quantum Limit. We thank Diamond Light Source for access to Beamline I05 (Proposals SI12469, SI14927, and SI16262), which contributed to the results presented here. V.S., L.B., and O.J.C. acknowledge the Engineering and Physical Sciences Research Council for PhD studentship support through Grants EP/L015110/1, EP/G03673X/1, and EP/K503162/1, respectively, and I.M. acknowledges studentship support from the International Max-Planck Research School for Chemistry and Physics of Quantum Materials. Publisher Copyright: {\textcopyright} 2018 National Academy of Sciences. All rights reserved.",
year = "2018",
month = dec,
day = "18",
doi = "10.1073/pnas.1811873115",
language = "English",
volume = "115",
pages = "12956--12960",
journal = "Proceedings of the National Academy of Sciences of the United States of America",
issn = "0027-8424",
publisher = "National Academy of Sciences",
number = "51",
}