Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO2

F. Mazzola; V. Sunko; S. Khim; H. Rosner; P. Kushwaha; O. J. Clark; L. Bawden; I. Marković; T. K. Kim; M. Hoesch; A. P. Mackenzie; P. D. C. King

doi:10.1073/pnas.1811873115

Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO₂

F. Mazzola, V. Sunko, S. Khim, H. Rosner, P. Kushwaha, O. J. Clark, L. Bawden, I. Marković, T. K. Kim, M. Hoesch, A. P. Mackenzie, P. D. C. King

Research output: Contribution to journal › Article › peer-review

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 PdCoO₂. 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 PdCrO₂, suggesting surface ferromagnetism persists in this sister compound despite its bulk antiferromagnetic order.

Original language	English
Pages (from-to)	12956-12960
Number of pages	5
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	115
Issue number	51
Early online date	4 Dec 2018
DOIs	https://doi.org/10.1073/pnas.1811873115
Publication status	Published - 18 Dec 2018

Keywords

Delafossite
Itinerant ferromagnetism
Electronic reconstruction
Transition-metal oxide
Angle-resolved photoemission

Access to Document

10.1073/pnas.1811873115

PNAS-MAIN
© 2018, the Author(s). This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1073/pnas.1811873115
Accepted author manuscript, 4.98 MB

ERC Starting Grant QUESTDO: H2020 ERC Starting Grant QUESTDO
King, P. (PI)
European Research Council
1/01/17 → 31/12/21
Project: Fellowship
CM DTC 2014 - 2022: EPSRC centre for doctoral training in condensed matter physics: Renewal of the CM-DTC
King, P. (PI)
EPSRC
1/08/14 → 31/01/24
Project: Standard
Royal Society Research Fellowship: Electronic structure engineering of novel topological phases
King, P. (PI)
The Royal Society
1/10/13 → 30/09/18
Project: Fellowship

Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO2 (dataset)
Mazzola, F. (Creator), Sunko, V. (Creator), Khim, S. (Creator), Rosner, H. (Creator), Kushwaha, P. (Creator), Clark, O. J. (Creator), Bawden, L. (Creator), Markovic, I. (Creator), Kim, T. K. (Creator), Hoesch, M. (Creator), Mackenzie, A. P. (Creator) & King, P. D. (Creator), University of St Andrews, 22 Nov 2018
DOI: 10.17630/fcc2f304-6bec-4fd9-94d2-02ee8fff065f
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Cite this

Mazzola, F., Sunko, V., Khim, S., Rosner, H., Kushwaha, P., Clark, O. J., Bawden, L., Marković, I., Kim, T. K., Hoesch, M., Mackenzie, A. P., & King, P. D. C. (2018). Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO₂. Proceedings of the National Academy of Sciences of the United States of America, 115(51), 12956-12960. https://doi.org/10.1073/pnas.1811873115

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title = "Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO2",

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 PdCoO2. 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 PdCrO2, suggesting surface ferromagnetism persists in this sister compound despite its bulk antiferromagnetic order.",

keywords = "Delafossite, Itinerant ferromagnetism, Electronic reconstruction, Transition-metal oxide, Angle-resolved photoemission",

author = "F. Mazzola and V. Sunko and S. Khim and H. Rosner and P. Kushwaha and Clark, {O. J.} and L. Bawden and I. Markovi{\'c} and Kim, {T. K.} and M. Hoesch and Mackenzie, {A. P.} and King, {P. D. C.}",

note = "Funding: Engineering and Physical Sciences Research Council, UK (Grant No. EP/I031014/1); VS, LB, and OJC acknowledge EPSRC for PhD studentship support through grant Nos. EP/L015110/1, EP/G03673X/1, and EP/K503162/1)",

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doi = "10.1073/pnas.1811873115",

language = "English",

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journal = "Proceedings of the National Academy of Sciences of the United States of America",

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Mazzola, F, Sunko, V, Khim, S, Rosner, H, Kushwaha, P, Clark, OJ, Bawden, L, Marković, I, Kim, TK, Hoesch, M, Mackenzie, AP & King, PDC 2018, 'Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO₂', Proceedings of the National Academy of Sciences of the United States of America, vol. 115, no. 51, pp. 12956-12960. https://doi.org/10.1073/pnas.1811873115

TY - JOUR

T1 - Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO2

AU - Mazzola, F.

AU - Sunko, V.

AU - Khim, S.

AU - Rosner, H.

AU - Kushwaha, P.

AU - Clark, O. J.

AU - Bawden, L.

AU - Marković, I.

AU - Kim, T. K.

AU - Hoesch, M.

AU - Mackenzie, A. P.

AU - King, P. D. C.

N1 - Funding: Engineering and Physical Sciences Research Council, UK (Grant No. EP/I031014/1); VS, LB, and OJC acknowledge EPSRC for PhD studentship support through grant Nos. EP/L015110/1, EP/G03673X/1, and EP/K503162/1)

PY - 2018/12/18

Y1 - 2018/12/18

N2 - 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 PdCoO2. 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 PdCrO2, suggesting surface ferromagnetism persists in this sister compound despite its bulk antiferromagnetic order.

AB - 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 PdCoO2. 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 PdCrO2, suggesting surface ferromagnetism persists in this sister compound despite its bulk antiferromagnetic order.

KW - Delafossite

KW - Itinerant ferromagnetism

KW - Electronic reconstruction

KW - Transition-metal oxide

KW - Angle-resolved photoemission

U2 - 10.1073/pnas.1811873115

DO - 10.1073/pnas.1811873115

M3 - Article

SN - 0027-8424

VL - 115

SP - 12956

EP - 12960

JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

IS - 51

ER -

Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO2

Abstract

Keywords

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Projects

ERC Starting Grant QUESTDO: H2020 ERC Starting Grant QUESTDO

CM DTC 2014 - 2022: EPSRC centre for doctoral training in condensed matter physics: Renewal of the CM-DTC

Royal Society Research Fellowship: Electronic structure engineering of novel topological phases

Datasets

Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO2 (dataset)

Cite this

Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO₂