--- OA_place: repository OA_type: free access _id: '21422' article_processing_charge: No author: - first_name: Veronika full_name: Sunko, Veronika id: 23cb1cf6-2c7a-11ef-91a4-f72fc19f20b3 last_name: Sunko orcid: 0000-0003-2724-3523 citation: ama: Sunko V. Data underpinning “Magneto-optical Kerr effect in an A-type antiferromagnet.” 2026. doi:10.15479/AT-ISTA-21422 apa: Sunko, V. (2026). Data underpinning “Magneto-optical Kerr effect in an A-type antiferromagnet.” Institute of Science and Technology Austria. https://doi.org/10.15479/AT-ISTA-21422 chicago: Sunko, Veronika. “Data Underpinning ‘Magneto-Optical Kerr Effect in an A-Type Antiferromagnet.’” Institute of Science and Technology Austria, 2026. https://doi.org/10.15479/AT-ISTA-21422. ieee: V. Sunko, “Data underpinning ‘Magneto-optical Kerr effect in an A-type antiferromagnet.’” Institute of Science and Technology Austria, 2026. ista: Sunko V. 2026. Data underpinning ‘Magneto-optical Kerr effect in an A-type antiferromagnet’, Institute of Science and Technology Austria, 10.15479/AT-ISTA-21422. mla: Sunko, Veronika. Data Underpinning “Magneto-Optical Kerr Effect in an A-Type Antiferromagnet.” Institute of Science and Technology Austria, 2026, doi:10.15479/AT-ISTA-21422. short: V. Sunko, (2026). corr_author: '1' date_created: 2026-03-11T07:04:26Z date_published: 2026-03-11T00:00:00Z date_updated: 2026-03-11T13:01:48Z day: '11' department: - _id: VeSu doi: 10.15479/AT-ISTA-21422 file: - access_level: open_access checksum: 54db0b68f0cf919009317fd3da8f733b content_type: application/zip creator: vsunko date_created: 2026-03-11T10:28:34Z date_updated: 2026-03-11T10:28:34Z file_id: '21429' file_name: MBT_Data_Paper.zip file_size: 85004 relation: main_file success: 1 - access_level: open_access checksum: df1785b7ada7cd07f76a441ee4f52266 content_type: text/plain creator: vsunko date_created: 2026-03-11T10:28:37Z date_updated: 2026-03-11T10:28:37Z file_id: '21430' file_name: README.txt file_size: 2593 relation: main_file success: 1 file_date_updated: 2026-03-11T10:28:37Z has_accepted_license: '1' month: '03' oa: 1 oa_version: None publisher: Institute of Science and Technology Austria status: public title: Data underpinning "Magneto-optical Kerr effect in an A-type antiferromagnet" tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: research_data user_id: 68b8ca59-c5b3-11ee-8790-cd641c68093d year: '2026' ... --- OA_place: repository OA_type: green _id: '21438' abstract: - lang: eng text: Antiferromagnets (AFMs) hold promise for applications in digital logic. However, switching AFM domains is challenging, as magnetic fields do not couple to the bulk antiferromagnetic order parameter. Here we show that magnetic-field-driven switching of AFM domains can in many cases be enabled by a generic reduction of magnetic exchange at surfaces. We use statistical mechanics and Monte Carlo simulations to demonstrate that an inequivalence in magnetic exchange between top and bottom surface moments, combined with the enhanced magnetic susceptibility of surface spins, can enable deterministic selection of antiferromagnetic domains depending on the magnetic-field ramping direction. We further show that this mechanism provides a natural interpretation for experimental observations of hysteresis in magneto-optical response of the van der Waals AFM $\mathrm{MnBi_2Te_4}$. Our findings highlight the critical role of surface spins in responses of antiferromagnets to magnetic fields. Furthermore, our results suggest that antiferromagnetic domain selection via purely magnetic means may be a more common and experimentally accessible phenomenon than previously assumed. acknowledgement: SFW acknowledges funding from Chalmers University of Technology through the department of Physics and the Areas of Advance Nano and Materials Science. VS acknowledges funding from Institute of Science and Technology Austria. Monte Carlo simulations were performed using computing resources from the PDC Center for High Performance Computing. These resources were granted by the National Academic Infrastructure for Supercomputing in Sweden (NAISS), partially funded by the Swedish Research Council through grant agreement no. 2022-06725. article_number: '2601.06646' article_processing_charge: No arxiv: 1 author: - first_name: Sophie F. full_name: Weber, Sophie F. last_name: Weber - first_name: Veronika full_name: Sunko, Veronika id: 23cb1cf6-2c7a-11ef-91a4-f72fc19f20b3 last_name: Sunko orcid: 0000-0003-2724-3523 citation: ama: Weber SF, Sunko V. Deterministic domain selection of antiferromagnets via magnetic fields. arXiv. doi:10.48550/arXiv.2601.06646 apa: Weber, S. F., & Sunko, V. (n.d.). Deterministic domain selection of antiferromagnets via magnetic fields. arXiv. https://doi.org/10.48550/arXiv.2601.06646 chicago: Weber, Sophie F., and Veronika Sunko. “Deterministic Domain Selection of Antiferromagnets via Magnetic Fields.” ArXiv, n.d. https://doi.org/10.48550/arXiv.2601.06646. ieee: S. F. Weber and V. Sunko, “Deterministic domain selection of antiferromagnets via magnetic fields,” arXiv. . ista: Weber SF, Sunko V. Deterministic domain selection of antiferromagnets via magnetic fields. arXiv, 2601.06646. mla: Weber, Sophie F., and Veronika Sunko. “Deterministic Domain Selection of Antiferromagnets via Magnetic Fields.” ArXiv, 2601.06646, doi:10.48550/arXiv.2601.06646. short: S.F. Weber, V. Sunko, ArXiv (n.d.). date_created: 2026-03-11T10:40:20Z date_published: 2026-01-10T00:00:00Z date_updated: 2026-03-16T08:57:18Z day: '10' department: - _id: VeSu doi: 10.48550/arXiv.2601.06646 external_id: arxiv: - '2601.06646' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2601.06646 month: '01' oa: 1 oa_version: Preprint publication: arXiv publication_status: submitted status: public title: Deterministic domain selection of antiferromagnets via magnetic fields type: preprint user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2026' ... --- OA_place: publisher OA_type: gold _id: '21436' abstract: - lang: eng text: 'The cobalt-intercalated transition metal dichalcogenide CoxTaS2 hosts a rich landscape of magnetic phases that depend sensitively on x. While the stoichiometric compound with x = 1/3 exhibits a single magnetic transition, samples with x≤0.325 display two transitions with an anomalous Hall effect (AHE) emerging in the lower temperature phase. Here, we resolve the spin structure in each phase by employing a suite of magneto-optical probes that include the discovery of anomalous magneto-birefringence: a spontaneous time-reversal sensitive rotation of the principal optic axes. A symmetry-based analysis identifies the AHE-active phase as an anisotropic (2+1)Q state, in which magnetic modulation at one wavevector (Q) differs in symmetry from that at the remaining two. The (2+1)Q state naturally exhibits scalar spin chirality as a mechanism for the AHE and expands the classification of multi-Q magnetic phases.' acknowledgement: 'We thank Linda Ye and Yue Sun for helpful discussion. Experimental and theoretical work at LBNL and UC Berkeley was funded by the Quantum Materials (KC2202) program under the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Contract No. DE-AC02-05CH11231. V.S. and J.O. received support from the Gordon and Betty Moore Foundation’s EPiQS Initiative through Grant GBMF4537 to J.O. at UC Berkeley. J.K. received support from the National Science Foundation Graduate Research Fellowship Program under Grant No. 2146752. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. During the preparation of this manuscript, we became aware of the following related work: refs. 56,57,58.' article_number: '2507.12588' article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Jonathon full_name: Kruppe, Jonathon last_name: Kruppe - first_name: Josue full_name: Rodriguez, Josue last_name: Rodriguez - first_name: Catherine full_name: Xu, Catherine last_name: Xu - first_name: James full_name: Analytis, James last_name: Analytis - first_name: Joseph full_name: Orenstein, Joseph last_name: Orenstein - first_name: Veronika full_name: Sunko, Veronika id: 23cb1cf6-2c7a-11ef-91a4-f72fc19f20b3 last_name: Sunko orcid: 0000-0003-2724-3523 citation: ama: Kruppe J, Rodriguez J, Xu C, Analytis J, Orenstein J, Sunko V. Anisotropic multi-Q order in CoxTaS2. npj Quantum Materials. 2026. doi:10.1038/s41535-026-00856-w apa: Kruppe, J., Rodriguez, J., Xu, C., Analytis, J., Orenstein, J., & Sunko, V. (2026). Anisotropic multi-Q order in CoxTaS2. Npj Quantum Materials. Springer Nature. https://doi.org/10.1038/s41535-026-00856-w chicago: Kruppe, Jonathon, Josue Rodriguez, Catherine Xu, James Analytis, Joseph Orenstein, and Veronika Sunko. “Anisotropic Multi-Q Order in CoxTaS2.” Npj Quantum Materials. Springer Nature, 2026. https://doi.org/10.1038/s41535-026-00856-w. ieee: J. Kruppe, J. Rodriguez, C. Xu, J. Analytis, J. Orenstein, and V. Sunko, “Anisotropic multi-Q order in CoxTaS2,” npj Quantum Materials. Springer Nature, 2026. ista: Kruppe J, Rodriguez J, Xu C, Analytis J, Orenstein J, Sunko V. 2026. Anisotropic multi-Q order in CoxTaS2. npj Quantum Materials., 2507.12588. mla: Kruppe, Jonathon, et al. “Anisotropic Multi-Q Order in CoxTaS2.” Npj Quantum Materials, 2507.12588, Springer Nature, 2026, doi:10.1038/s41535-026-00856-w. short: J. Kruppe, J. Rodriguez, C. Xu, J. Analytis, J. Orenstein, V. Sunko, Npj Quantum Materials (2026). corr_author: '1' date_created: 2026-03-11T10:39:55Z date_published: 2026-04-09T00:00:00Z date_updated: 2026-04-15T13:03:14Z day: '09' department: - _id: VeSu doi: 10.1038/s41535-026-00856-w external_id: arxiv: - '2507.12588' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1038/s41535-026-00856-w month: '04' oa: 1 oa_version: Published Version publication: npj Quantum Materials publication_identifier: eissn: - 2397-4648 publication_status: epub_ahead publisher: Springer Nature quality_controlled: '1' scopus_import: '1' status: public title: Anisotropic multi-Q order in CoxTaS2 type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2026' ... --- OA_place: repository OA_type: green _id: '21435' abstract: - lang: eng text: Multiferroic materials, in which electric polarization and magnetic order coexist and couple, offer rich opportunities for both fundamental discovery and technology. However, multiferroicity remains rare due to conflicting electronic requirements for ferroelectricity and magnetism. One route to circumvent this challenge is to exploit the noncollinear ordering of spin cycloids, whose symmetry permits the emergence of polar order. In this work, we introduce another pathway to multiferroic order in which strain generates polarization in materials that host nonpolar spin spirals. To demonstrate this phenomenon, we chose the spin spiral in the well-studied helimagnet Cr1/3NbS2. To detect the induced polarization, we introduce the technique of magnetoelectric birefringence (MEB), an optical probe that enables spatially-resolved and unambiguous detection of polar order. By combining MEB imaging with strain engineering, we confirm the onset of a polar vector at the magnetic transition, establishing strained Cr1/3NbS2 as a type-II multiferroic. acknowledgement: "Y.S., V.S. and J.O. received support from the Gordon and Betty Moore Foundation’s\r\nEPiQS Initiative through Grant GBMF4537 to J.O. at UC Berkeley. Experimental and theoretical work at LBNL and UC Berkeley was funded by the Quantum Materials (KC2202) program under the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences,\r\nMaterials Sciences and Engineering Division under Contract No. DE-AC02-05CH11231.\r\nY.S. also acknowledges support by the David J. Thouless Postdoctoral Fellowship at the\r\nDepartment of Physics, University of Washington. DGM acknowledges support from the\r\nGordon and Betty Moore Foundation’s EPiQS Initiative, Grant GBMF9069. L.Z. acknowledges the support from the U.S. Department of Energy (DOE), Office of Science, Basic\r\nEnergy Science (BES), under award No. DE-SC0024145" article_number: '2510.11619' article_processing_charge: No arxiv: 1 author: - first_name: Y. full_name: Sun, Y. last_name: Sun - first_name: Y. full_name: Ahn, Y. last_name: Ahn - first_name: D. full_name: Sapkota, D. last_name: Sapkota - first_name: H. S. full_name: Arachchige, H. S. last_name: Arachchige - first_name: R. full_name: Xue, R. last_name: Xue - first_name: S. full_name: Mozaffari, S. last_name: Mozaffari - first_name: D. G. full_name: Mandrus, D. G. last_name: Mandrus - first_name: L. full_name: Zhao, L. last_name: Zhao - first_name: J. full_name: Orenstein, J. last_name: Orenstein - first_name: Veronika full_name: Sunko, Veronika id: 23cb1cf6-2c7a-11ef-91a4-f72fc19f20b3 last_name: Sunko orcid: 0000-0003-2724-3523 citation: ama: Sun Y, Ahn Y, Sapkota D, et al. Strain-induced multiferroicity in Cr1/3NbS2. arXiv. doi:10.48550/arXiv.2510.11619 apa: Sun, Y., Ahn, Y., Sapkota, D., Arachchige, H. S., Xue, R., Mozaffari, S., … Sunko, V. (n.d.). Strain-induced multiferroicity in Cr1/3NbS2. arXiv. https://doi.org/10.48550/arXiv.2510.11619 chicago: Sun, Y., Y. Ahn, D. Sapkota, H. S. Arachchige, R. Xue, S. Mozaffari, D. G. Mandrus, L. Zhao, J. Orenstein, and Veronika Sunko. “Strain-Induced Multiferroicity in Cr1/3NbS2.” ArXiv, n.d. https://doi.org/10.48550/arXiv.2510.11619. ieee: Y. Sun et al., “Strain-induced multiferroicity in Cr1/3NbS2,” arXiv. . ista: Sun Y, Ahn Y, Sapkota D, Arachchige HS, Xue R, Mozaffari S, Mandrus DG, Zhao L, Orenstein J, Sunko V. Strain-induced multiferroicity in Cr1/3NbS2. arXiv, 2510.11619. mla: Sun, Y., et al. “Strain-Induced Multiferroicity in Cr1/3NbS2.” ArXiv, 2510.11619, doi:10.48550/arXiv.2510.11619. short: Y. Sun, Y. Ahn, D. Sapkota, H.S. Arachchige, R. Xue, S. Mozaffari, D.G. Mandrus, L. Zhao, J. Orenstein, V. Sunko, ArXiv (n.d.). corr_author: '1' date_created: 2026-03-11T10:39:44Z date_published: 2025-10-13T00:00:00Z date_updated: 2026-03-16T08:43:57Z day: '13' department: - _id: VeSu doi: 10.48550/arXiv.2510.11619 external_id: arxiv: - '2510.11619' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2510.11619 month: '10' oa: 1 oa_version: Preprint publication: arXiv publication_status: submitted status: public title: Strain-induced multiferroicity in Cr1/3NbS2 type: preprint user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2025' ... --- OA_place: repository OA_type: green _id: '21437' abstract: - lang: eng text: Altermagnets are a class of collinear magnets that exhibit non-relativistic spin splitting (NRSS) of electronic bands in the absence of net magnetization. Their potential to generate large spin polarization without spin-orbit coupling has created strong interest in probes that access the underlying order parameter directly. In this Perspective, we show that linear magneto-birefringence (LMB) provides a natural and broadly applicable route to detecting altermagnetic order. Building on the correspondence between the momentum-space structure of NRSS and the ferroic ordering of magnetic multipoles in real space, we demonstrate how $d$-wave and $g$-wave NRSS textures yield distinct LMB responses. We present a symmetry-based framework that identifies the optical geometries and field configurations required to isolate specific multipole components, enabling domain imaging and providing benchmarks for theoretical models of LMB. acknowledgement: We thank Nicola Spaldin for valuable discussions. J.O. received support from the Quantum Materials (KC2202) program under the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Contract No. DE-AC02-05CH11231, and the Gordon and Betty Moore Foundation’s EPiQS Initiative through Grant GBMF4537 to J.O. at UC Berkeley. article_number: '2511.16421' article_processing_charge: No arxiv: 1 author: - first_name: Veronika full_name: Sunko, Veronika id: 23cb1cf6-2c7a-11ef-91a4-f72fc19f20b3 last_name: Sunko orcid: 0000-0003-2724-3523 - first_name: J. full_name: Orenstein, J. last_name: Orenstein citation: ama: Sunko V, Orenstein J. Linear magneto-birefringence as a probe of altermagnetism. arXiv. doi:10.48550/arXiv.2511.16421 apa: Sunko, V., & Orenstein, J. (n.d.). Linear magneto-birefringence as a probe of altermagnetism. arXiv. https://doi.org/10.48550/arXiv.2511.16421 chicago: Sunko, Veronika, and J. Orenstein. “Linear Magneto-Birefringence as a Probe of Altermagnetism.” ArXiv, n.d. https://doi.org/10.48550/arXiv.2511.16421. ieee: V. Sunko and J. Orenstein, “Linear magneto-birefringence as a probe of altermagnetism,” arXiv. . ista: Sunko V, Orenstein J. Linear magneto-birefringence as a probe of altermagnetism. arXiv, 2511.16421. mla: Sunko, Veronika, and J. Orenstein. “Linear Magneto-Birefringence as a Probe of Altermagnetism.” ArXiv, 2511.16421, doi:10.48550/arXiv.2511.16421. short: V. Sunko, J. Orenstein, ArXiv (n.d.). corr_author: '1' date_created: 2026-03-11T10:40:08Z date_published: 2025-11-20T00:00:00Z date_updated: 2026-03-16T08:52:35Z day: '20' department: - _id: VeSu doi: 10.48550/arXiv.2511.16421 external_id: arxiv: - '2511.16421' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2511.16421 month: '11' oa: 1 oa_version: Preprint publication: arXiv publication_status: submitted status: public title: Linear magneto-birefringence as a probe of altermagnetism tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: preprint user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2025' ...