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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2503.19408 |
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| _version_ | 1866917967876325376 |
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| author | Heo, Hyeokjun An, Jeongha Kwon, Junyoung Kim, Kwangrae Son, Youngoh Kim, B. J. Jang, Joonho |
| author_facet | Heo, Hyeokjun An, Jeongha Kwon, Junyoung Kim, Kwangrae Son, Youngoh Kim, B. J. Jang, Joonho |
| contents | Sr2IrO4 is one of the prime candidates for realizing exotic quantum spin orders owing to the subtle combination of spin-orbit coupling and electron correlation. Sensitive local magnetization measurement can serve as a powerful tool to study these kinds of systems with multiple competing spin orders since the comprehensive study of the spatially-varying magnetic responses provide crucial information of their energetics. Here, using sensitive magneto-optical Kerr effect measurements and spin Hamiltonian model calculations, we show that Sr2IrO4 has non-trivial domain structures which cannot be understood by conventional antiferromagnetism. This unconventional magnetic response exhibits broken symmetry along the Ir-O-Ir bond direction and is enhanced upon spin-flip transition or Rh-doping. Our analysis, based on possible stacking patterns of spins, shows that introduction of an additional rotational-symmetry breaking is essential to describe the magnetic behavior of Sr2Ir1-xRhxO4, providing strong evidence for a nematic hidden order phase in this highly correlated spin-orbit Mott insulator. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_19408 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Interplay of canted antiferromagnetism and nematic order in Mott insulating Sr2Ir1-xRhxO4 Heo, Hyeokjun An, Jeongha Kwon, Junyoung Kim, Kwangrae Son, Youngoh Kim, B. J. Jang, Joonho Materials Science Strongly Correlated Electrons Sr2IrO4 is one of the prime candidates for realizing exotic quantum spin orders owing to the subtle combination of spin-orbit coupling and electron correlation. Sensitive local magnetization measurement can serve as a powerful tool to study these kinds of systems with multiple competing spin orders since the comprehensive study of the spatially-varying magnetic responses provide crucial information of their energetics. Here, using sensitive magneto-optical Kerr effect measurements and spin Hamiltonian model calculations, we show that Sr2IrO4 has non-trivial domain structures which cannot be understood by conventional antiferromagnetism. This unconventional magnetic response exhibits broken symmetry along the Ir-O-Ir bond direction and is enhanced upon spin-flip transition or Rh-doping. Our analysis, based on possible stacking patterns of spins, shows that introduction of an additional rotational-symmetry breaking is essential to describe the magnetic behavior of Sr2Ir1-xRhxO4, providing strong evidence for a nematic hidden order phase in this highly correlated spin-orbit Mott insulator. |
| title | Interplay of canted antiferromagnetism and nematic order in Mott insulating Sr2Ir1-xRhxO4 |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2503.19408 |