Unveiling unconventional magnetism at the surface of Sr2RuO4

R. Fittipaldi; R. Hartmann; M. T. Mercaldo; S. Komori; A. Bjørlig; W. Kyung; Y. Yasui; T. Miyoshi; L. A.B. Olde Olthof; C. M. Palomares Garcia; V. Granata; I. Keren; W. Higemoto; A. Suter; T. Prokscha; A. Romano; C. Noce; C. Kim; Y. Maeno; E. Scheer; B. Kalisky; J. W.A. Robinson; M. Cuoco; Z. Salman; A. Vecchione; A. Di Bernardo

doi:https://doi.org/10.1038/s41467-021-26020-5

Unveiling unconventional magnetism at the surface of Sr₂RuO₄

R. Fittipaldi, R. Hartmann, M. T. Mercaldo, S. Komori, A. Bjørlig, W. Kyung, Y. Yasui, T. Miyoshi, L. A.B. Olde Olthof, C. M. Palomares Garcia, V. Granata, I. Keren, W. Higemoto, A. Suter, T. Prokscha, A. Romano, C. Noce, C. Kim, Y. Maeno, E. ScheerB. Kalisky, J. W.A. Robinson, M. Cuoco, Z. Salman, A. Vecchione, A. Di Bernardo

Department of Physics

Bar-Ilan University

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

Abstract

Materials with strongly correlated electrons often exhibit interesting physical properties. An example of these materials is the layered oxide perovskite Sr₂RuO₄, which has been intensively investigated due to its unusual properties. Whilst the debate on the symmetry of the superconducting state in Sr₂RuO₄ is still ongoing, a deeper understanding of the Sr₂RuO₄ normal state appears crucial as this is the background in which electron pairing occurs. Here, by using low-energy muon spin spectroscopy we discover the existence of surface magnetism in Sr₂RuO₄ in its normal state. We detect static weak dipolar fields yet manifesting at an onset temperature higher than 50 K. We ascribe this unconventional magnetism to orbital loop currents forming at the reconstructed Sr₂RuO₄ surface. Our observations set a reference for the discovery of the same magnetic phase in other materials and unveil an electronic ordering mechanism that can influence electron pairing with broken time reversal symmetry.

Original language	English
Article number	5792
Journal	Nature Communications
Volume	12
Issue number	1
DOIs	https://doi.org/10.1038/s41467-021-26020-5
State	Published - 4 Oct 2021

All Science Journal Classification (ASJC) codes

General Chemistry
General
General Biochemistry,Genetics and Molecular Biology
General Physics and Astronomy

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https://doi.org/10.1038/s41467-021-26020-5

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Fittipaldi, R., Hartmann, R., Mercaldo, M. T., Komori, S., Bjørlig, A., Kyung, W., Yasui, Y., Miyoshi, T., Olde Olthof, L. A. B., Palomares Garcia, C. M., Granata, V., Keren, I., Higemoto, W., Suter, A., Prokscha, T., Romano, A., Noce, C., Kim, C., Maeno, Y., ... Di Bernardo, A. (2021). Unveiling unconventional magnetism at the surface of Sr₂RuO₄. Nature Communications, 12(1), Article 5792. https://doi.org/10.1038/s41467-021-26020-5

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title = "Unveiling unconventional magnetism at the surface of Sr2RuO4",

abstract = "Materials with strongly correlated electrons often exhibit interesting physical properties. An example of these materials is the layered oxide perovskite Sr2RuO4, which has been intensively investigated due to its unusual properties. Whilst the debate on the symmetry of the superconducting state in Sr2RuO4 is still ongoing, a deeper understanding of the Sr2RuO4 normal state appears crucial as this is the background in which electron pairing occurs. Here, by using low-energy muon spin spectroscopy we discover the existence of surface magnetism in Sr2RuO4 in its normal state. We detect static weak dipolar fields yet manifesting at an onset temperature higher than 50 K. We ascribe this unconventional magnetism to orbital loop currents forming at the reconstructed Sr2RuO4 surface. Our observations set a reference for the discovery of the same magnetic phase in other materials and unveil an electronic ordering mechanism that can influence electron pairing with broken time reversal symmetry.",

author = "R. Fittipaldi and R. Hartmann and Mercaldo, {M. T.} and S. Komori and A. Bj{\o}rlig and W. Kyung and Y. Yasui and T. Miyoshi and {Olde Olthof}, {L. A.B.} and {Palomares Garcia}, {C. M.} and V. Granata and I. Keren and W. Higemoto and A. Suter and T. Prokscha and A. Romano and C. Noce and C. Kim and Y. Maeno and E. Scheer and B. Kalisky and Robinson, {J. W.A.} and M. Cuoco and Z. Salman and A. Vecchione and {Di Bernardo}, A.",

note = "Publisher Copyright: {\textcopyright} 2021, The Author(s).",

year = "2021",

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day = "4",

doi = "https://doi.org/10.1038/s41467-021-26020-5",

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Fittipaldi, R, Hartmann, R, Mercaldo, MT, Komori, S, Bjørlig, A, Kyung, W, Yasui, Y, Miyoshi, T, Olde Olthof, LAB, Palomares Garcia, CM, Granata, V, Keren, I, Higemoto, W, Suter, A, Prokscha, T, Romano, A, Noce, C, Kim, C, Maeno, Y, Scheer, E, Kalisky, B, Robinson, JWA, Cuoco, M, Salman, Z, Vecchione, A & Di Bernardo, A 2021, 'Unveiling unconventional magnetism at the surface of Sr₂RuO₄', Nature Communications, vol. 12, no. 1, 5792. https://doi.org/10.1038/s41467-021-26020-5

TY - JOUR

T1 - Unveiling unconventional magnetism at the surface of Sr2RuO4

AU - Fittipaldi, R.

AU - Hartmann, R.

AU - Mercaldo, M. T.

AU - Komori, S.

AU - Bjørlig, A.

AU - Kyung, W.

AU - Yasui, Y.

AU - Miyoshi, T.

AU - Olde Olthof, L. A.B.

AU - Palomares Garcia, C. M.

AU - Granata, V.

AU - Keren, I.

AU - Higemoto, W.

AU - Suter, A.

AU - Prokscha, T.

AU - Romano, A.

AU - Noce, C.

AU - Kim, C.

AU - Maeno, Y.

AU - Scheer, E.

AU - Kalisky, B.

AU - Robinson, J. W.A.

AU - Cuoco, M.

AU - Salman, Z.

AU - Vecchione, A.

AU - Di Bernardo, A.

PY - 2021/10/4

Y1 - 2021/10/4

N2 - Materials with strongly correlated electrons often exhibit interesting physical properties. An example of these materials is the layered oxide perovskite Sr2RuO4, which has been intensively investigated due to its unusual properties. Whilst the debate on the symmetry of the superconducting state in Sr2RuO4 is still ongoing, a deeper understanding of the Sr2RuO4 normal state appears crucial as this is the background in which electron pairing occurs. Here, by using low-energy muon spin spectroscopy we discover the existence of surface magnetism in Sr2RuO4 in its normal state. We detect static weak dipolar fields yet manifesting at an onset temperature higher than 50 K. We ascribe this unconventional magnetism to orbital loop currents forming at the reconstructed Sr2RuO4 surface. Our observations set a reference for the discovery of the same magnetic phase in other materials and unveil an electronic ordering mechanism that can influence electron pairing with broken time reversal symmetry.

AB - Materials with strongly correlated electrons often exhibit interesting physical properties. An example of these materials is the layered oxide perovskite Sr2RuO4, which has been intensively investigated due to its unusual properties. Whilst the debate on the symmetry of the superconducting state in Sr2RuO4 is still ongoing, a deeper understanding of the Sr2RuO4 normal state appears crucial as this is the background in which electron pairing occurs. Here, by using low-energy muon spin spectroscopy we discover the existence of surface magnetism in Sr2RuO4 in its normal state. We detect static weak dipolar fields yet manifesting at an onset temperature higher than 50 K. We ascribe this unconventional magnetism to orbital loop currents forming at the reconstructed Sr2RuO4 surface. Our observations set a reference for the discovery of the same magnetic phase in other materials and unveil an electronic ordering mechanism that can influence electron pairing with broken time reversal symmetry.

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U2 - https://doi.org/10.1038/s41467-021-26020-5

DO - https://doi.org/10.1038/s41467-021-26020-5

M3 - مقالة

C2 - 34608149

SN - 2041-1723

VL - 12

JO - Nature Communications

JF - Nature Communications

IS - 1

M1 - 5792

ER -

Unveiling unconventional magnetism at the surface of Sr₂RuO₄

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All Science Journal Classification (ASJC) codes

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