Using low-energy muon spin spectroscopy, this study discovers surface magnetism in Sr₂RuO₄'s normal state, characterized by static weak dipolar fields with an onset temperature above 50 K. This unconventional magnetism is attributed to orbital loop currents at the reconstructed surface. The findings provide a reference for similar discoveries in other materials and reveal an electronic ordering mechanism potentially influencing electron pairing with broken time reversal symmetry.
Publisher
NATURE COMMUNICATIONS
Published On
Oct 04, 2021
Authors
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
Tags
surface magnetism
Sr₂RuO₄
muon spin spectroscopy
dipolar fields
orbital loop currents
electronic ordering
time reversal symmetry
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