[{"APC_amount":"3054 EUR","title":"Massive Dirac-Pauli physics in lead-halide perovskites","department":[{"_id":"GradSch"},{"_id":"ZhAl"},{"_id":"MiLe"}],"file":[{"file_id":"19536","access_level":"open_access","file_name":"2025_njpQuantumMaterials_Kumar.pdf","date_updated":"2025-04-10T06:12:49Z","creator":"dernst","success":1,"file_size":592092,"date_created":"2025-04-10T06:12:49Z","relation":"main_file","checksum":"08b1a94b362bb65482887e50020810e5","content_type":"application/pdf"}],"project":[{"name":"IST Austria Open Access Fund","_id":"B67AFEDC-15C9-11EA-A837-991A96BB2854"}],"doi":"10.1038/s41535-025-00754-7","quality_controlled":"1","date_published":"2025-04-04T00:00:00Z","tmp":{"image":"/images/cc_by_nc_nd.png","name":"Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)","legal_code_url":"https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode","short":"CC BY-NC-ND (4.0)"},"day":"04","author":[{"last_name":"Shiva Kumar","id":"5e9a6931-eb97-11eb-a6c2-e96f7058d77a","first_name":"Abhishek","full_name":"Shiva Kumar, Abhishek"},{"first_name":"Mikhail","full_name":"Maslov, Mikhail","last_name":"Maslov","orcid":"0000-0003-4074-2570","id":"2E65BB0E-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Mikhail","full_name":"Lemeshko, Mikhail","last_name":"Lemeshko","orcid":"0000-0002-6990-7802","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Volosniev","id":"37D278BC-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0003-0393-5525","first_name":"Artem","full_name":"Volosniev, Artem"},{"first_name":"Zhanybek","full_name":"Alpichshev, Zhanybek","last_name":"Alpichshev","orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87"}],"article_processing_charge":"Yes","corr_author":"1","publication_status":"published","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","year":"2025","DOAJ_listed":"1","status":"public","scopus_import":"1","file_date_updated":"2025-04-10T06:12:49Z","type":"journal_article","_id":"19531","OA_place":"publisher","has_accepted_license":"1","abstract":[{"lang":"eng","text":"In standard quantum electrodynamics (QED), the so-called non-minimal (Pauli) coupling is suppressed for elementary particles and has no physical implications. Here, we show that the Pauli term naturally appears in a known family of Dirac materials—the lead-halide perovskites, suggesting a novel playground for the study of analog QED effects. We outline measurable manifestations of the Pauli term in the phenomena pertaining to (i) relativistic corrections to bound states (ii) the Klein paradox, and (iii) spin effects in scattering. In particular, we demonstrate that (a) the binding energy of an electron in the vicinity of a positively charged defect is noticeably decreased due to the polarizability of lead ions and the appearance of a Darwin-like term, (b) strong spin-orbit coupling due to the Pauli term affects the exciton states, and (c) scattering of an electron off an energy barrier with broken mirror symmetry produces spin polarization in the outgoing current. Our study adds to the understanding of quantum phenomena in lead-halide perovskites and paves the way for tabletop simulations of analog Dirac-Pauli equations."}],"month":"04","article_number":"37","language":[{"iso":"eng"}],"external_id":{"isi":["001459830100002"]},"isi":1,"publication":"npj Quantum Materials","OA_type":"gold","publisher":"Springer Nature","date_created":"2025-04-08T18:13:06Z","ddc":["530"],"citation":{"mla":"Shiva Kumar, Abhishek, et al. “Massive Dirac-Pauli Physics in Lead-Halide Perovskites.” <i>Npj Quantum Materials</i>, vol. 10, 37, Springer Nature, 2025, doi:<a href=\"https://doi.org/10.1038/s41535-025-00754-7\">10.1038/s41535-025-00754-7</a>.","short":"A. Shiva Kumar, M. Maslov, M. Lemeshko, A. Volosniev, Z. Alpichshev, Npj Quantum Materials 10 (2025).","apa":"Shiva Kumar, A., Maslov, M., Lemeshko, M., Volosniev, A., &#38; Alpichshev, Z. (2025). Massive Dirac-Pauli physics in lead-halide perovskites. <i>Npj Quantum Materials</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41535-025-00754-7\">https://doi.org/10.1038/s41535-025-00754-7</a>","chicago":"Shiva Kumar, Abhishek, Mikhail Maslov, Mikhail Lemeshko, Artem Volosniev, and Zhanybek Alpichshev. “Massive Dirac-Pauli Physics in Lead-Halide Perovskites.” <i>Npj Quantum Materials</i>. Springer Nature, 2025. <a href=\"https://doi.org/10.1038/s41535-025-00754-7\">https://doi.org/10.1038/s41535-025-00754-7</a>.","ista":"Shiva Kumar A, Maslov M, Lemeshko M, Volosniev A, Alpichshev Z. 2025. Massive Dirac-Pauli physics in lead-halide perovskites. npj Quantum Materials. 10, 37.","ieee":"A. Shiva Kumar, M. Maslov, M. Lemeshko, A. Volosniev, and Z. Alpichshev, “Massive Dirac-Pauli physics in lead-halide perovskites,” <i>npj Quantum Materials</i>, vol. 10. Springer Nature, 2025.","ama":"Shiva Kumar A, Maslov M, Lemeshko M, Volosniev A, Alpichshev Z. Massive Dirac-Pauli physics in lead-halide perovskites. <i>npj Quantum Materials</i>. 2025;10. doi:<a href=\"https://doi.org/10.1038/s41535-025-00754-7\">10.1038/s41535-025-00754-7</a>"},"intvolume":"        10","publication_identifier":{"eissn":["2397-4648"]},"volume":10,"article_type":"original","related_material":{"link":[{"url":"https://git.ista.ac.at/mmaslov/dirac_pauli_LHP","relation":"software"}]},"date_updated":"2026-05-06T13:06:08Z","oa":1,"oa_version":"Published Version"},{"date_updated":"2025-04-23T08:53:33Z","oa":1,"oa_version":"Preprint","date_created":"2023-03-14T13:11:59Z","citation":{"mla":"Volosniev, Artem, et al. “Spin-Electric Coupling in Lead Halide Perovskites.” <i>Physical Review Letters</i>, vol. 130, no. 10, 106901, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/physrevlett.130.106901\">10.1103/physrevlett.130.106901</a>.","short":"A. Volosniev, A. Shiva Kumar, D. Lorenc, Y. Ashourishokri, A.A. Zhumekenov, O.M. Bakr, M. Lemeshko, Z. Alpichshev, Physical Review Letters 130 (2023).","ista":"Volosniev A, Shiva Kumar A, Lorenc D, Ashourishokri Y, Zhumekenov AA, Bakr OM, Lemeshko M, Alpichshev Z. 2023. Spin-electric coupling in lead halide perovskites. Physical Review Letters. 130(10), 106901.","apa":"Volosniev, A., Shiva Kumar, A., Lorenc, D., Ashourishokri, Y., Zhumekenov, A. A., Bakr, O. M., … Alpichshev, Z. (2023). Spin-electric coupling in lead halide perovskites. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevlett.130.106901\">https://doi.org/10.1103/physrevlett.130.106901</a>","chicago":"Volosniev, Artem, Abhishek Shiva Kumar, Dusan Lorenc, Younes Ashourishokri, Ayan A. Zhumekenov, Osman M. Bakr, Mikhail Lemeshko, and Zhanybek Alpichshev. “Spin-Electric Coupling in Lead Halide Perovskites.” <i>Physical Review Letters</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/physrevlett.130.106901\">https://doi.org/10.1103/physrevlett.130.106901</a>.","ama":"Volosniev A, Shiva Kumar A, Lorenc D, et al. Spin-electric coupling in lead halide perovskites. <i>Physical Review Letters</i>. 2023;130(10). doi:<a href=\"https://doi.org/10.1103/physrevlett.130.106901\">10.1103/physrevlett.130.106901</a>","ieee":"A. Volosniev <i>et al.</i>, “Spin-electric coupling in lead halide perovskites,” <i>Physical Review Letters</i>, vol. 130, no. 10. American Physical Society, 2023."},"intvolume":"       130","publisher":"American Physical Society","publication":"Physical Review Letters","article_type":"original","main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.2203.09443"}],"publication_identifier":{"issn":["0031-9007"],"eissn":["1079-7114"]},"volume":130,"abstract":[{"lang":"eng","text":"Lead halide perovskites enjoy a number of remarkable optoelectronic properties. To explain their origin, it is necessary to study how electromagnetic fields interact with these systems. We address this problem here by studying two classical quantities: Faraday rotation and the complex refractive index in a paradigmatic perovskite CH3NH3PbBr3 in a broad wavelength range. We find that the minimal coupling of electromagnetic fields to the k⋅p Hamiltonian is insufficient to describe the observed data even on the qualitative level. To amend this, we demonstrate that there exists a relevant atomic-level coupling between electromagnetic fields and the spin degree of freedom. This spin-electric coupling allows for quantitative description of a number of previous as well as present experimental data. In particular, we use it here to show that the Faraday effect in lead halide perovskites is dominated by the Zeeman splitting of the energy levels and has a substantial beyond-Becquerel contribution. Finally, we present general symmetry-based phenomenological arguments that in the low-energy limit our effective model includes all basis coupling terms to the electromagnetic field in the linear order."}],"_id":"12723","type":"journal_article","external_id":{"arxiv":["2203.09443"],"isi":["000982435900002"],"pmid":["36962044"]},"isi":1,"language":[{"iso":"eng"}],"article_number":"106901","month":"03","status":"public","keyword":["General Physics and Astronomy"],"pmid":1,"scopus_import":"1","issue":"10","publication_status":"published","year":"2023","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","author":[{"orcid":"0000-0003-0393-5525","id":"37D278BC-F248-11E8-B48F-1D18A9856A87","last_name":"Volosniev","full_name":"Volosniev, Artem","first_name":"Artem"},{"last_name":"Shiva Kumar","id":"5e9a6931-eb97-11eb-a6c2-e96f7058d77a","first_name":"Abhishek","full_name":"Shiva Kumar, Abhishek"},{"first_name":"Dusan","full_name":"Lorenc, Dusan","last_name":"Lorenc","id":"40D8A3E6-F248-11E8-B48F-1D18A9856A87"},{"id":"e32c111f-f6e0-11ea-865d-eb955baea334","last_name":"Ashourishokri","full_name":"Ashourishokri, Younes","first_name":"Younes"},{"first_name":"Ayan A.","full_name":"Zhumekenov, Ayan A.","last_name":"Zhumekenov"},{"last_name":"Bakr","full_name":"Bakr, Osman M.","first_name":"Osman M."},{"full_name":"Lemeshko, Mikhail","first_name":"Mikhail","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-6990-7802","last_name":"Lemeshko"},{"last_name":"Alpichshev","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-7183-5203","first_name":"Zhanybek","full_name":"Alpichshev, Zhanybek"}],"day":"10","date_published":"2023-03-10T00:00:00Z","corr_author":"1","arxiv":1,"article_processing_charge":"No","quality_controlled":"1","doi":"10.1103/physrevlett.130.106901","department":[{"_id":"GradSch"},{"_id":"ZhAl"},{"_id":"MiLe"}],"title":"Spin-electric coupling in lead halide perovskites"},{"month":"03","article_number":"125201","language":[{"iso":"eng"}],"external_id":{"isi":["000972602200006"],"arxiv":["2204.04022"]},"isi":1,"type":"journal_article","_id":"12724","abstract":[{"text":"We use general symmetry-based arguments to construct an effective model suitable for studying optical properties of lead halide perovskites. To build the model, we identify an atomic-level interaction between electromagnetic fields and the spin degree of freedom that should be added to a minimally coupled k⋅p Hamiltonian. As a first application, we study two basic optical characteristics of the material: the Verdet constant and the refractive index. Beyond these linear characteristics of the material, the model is suitable for calculating nonlinear effects such as the third-order optical susceptibility. Analysis of this quantity shows that the geometrical properties of the spin-electric term imply isotropic optical response of the system, and that optical anisotropy of lead halide perovskites is a manifestation of hopping of charge carriers. To illustrate this, we discuss third-harmonic generation.","lang":"eng"}],"issue":"12","scopus_import":"1","status":"public","oa_version":"Preprint","date_updated":"2024-10-09T21:04:46Z","oa":1,"publication_identifier":{"eissn":["2469-9969"],"issn":["2469-9950"]},"volume":107,"main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.2204.04022"}],"article_type":"original","publisher":"American Physical Society","publication":"Physical Review B","intvolume":"       107","date_created":"2023-03-14T13:13:05Z","citation":{"mla":"Volosniev, Artem, et al. “Effective Model for Studying Optical Properties of Lead Halide Perovskites.” <i>Physical Review B</i>, vol. 107, no. 12, 125201, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/physrevb.107.125201\">10.1103/physrevb.107.125201</a>.","short":"A. Volosniev, A. Shiva Kumar, D. Lorenc, Y. Ashourishokri, A. Zhumekenov, O.M. Bakr, M. Lemeshko, Z. Alpichshev, Physical Review B 107 (2023).","ista":"Volosniev A, Shiva Kumar A, Lorenc D, Ashourishokri Y, Zhumekenov A, Bakr OM, Lemeshko M, Alpichshev Z. 2023. Effective model for studying optical properties of lead halide perovskites. Physical Review B. 107(12), 125201.","chicago":"Volosniev, Artem, Abhishek Shiva Kumar, Dusan Lorenc, Younes Ashourishokri, Ayan Zhumekenov, Osman M. Bakr, Mikhail Lemeshko, and Zhanybek Alpichshev. “Effective Model for Studying Optical Properties of Lead Halide Perovskites.” <i>Physical Review B</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/physrevb.107.125201\">https://doi.org/10.1103/physrevb.107.125201</a>.","apa":"Volosniev, A., Shiva Kumar, A., Lorenc, D., Ashourishokri, Y., Zhumekenov, A., Bakr, O. M., … Alpichshev, Z. (2023). Effective model for studying optical properties of lead halide perovskites. <i>Physical Review B</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevb.107.125201\">https://doi.org/10.1103/physrevb.107.125201</a>","ieee":"A. Volosniev <i>et al.</i>, “Effective model for studying optical properties of lead halide perovskites,” <i>Physical Review B</i>, vol. 107, no. 12. American Physical Society, 2023.","ama":"Volosniev A, Shiva Kumar A, Lorenc D, et al. Effective model for studying optical properties of lead halide perovskites. <i>Physical Review B</i>. 2023;107(12). doi:<a href=\"https://doi.org/10.1103/physrevb.107.125201\">10.1103/physrevb.107.125201</a>"},"doi":"10.1103/physrevb.107.125201","quality_controlled":"1","title":"Effective model for studying optical properties of lead halide perovskites","department":[{"_id":"GradSch"},{"_id":"ZhAl"},{"_id":"MiLe"}],"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","year":"2023","publication_status":"published","arxiv":1,"article_processing_charge":"No","corr_author":"1","date_published":"2023-03-15T00:00:00Z","day":"15","author":[{"first_name":"Artem","full_name":"Volosniev, Artem","last_name":"Volosniev","orcid":"0000-0003-0393-5525","id":"37D278BC-F248-11E8-B48F-1D18A9856A87"},{"id":"5e9a6931-eb97-11eb-a6c2-e96f7058d77a","last_name":"Shiva Kumar","full_name":"Shiva Kumar, Abhishek","first_name":"Abhishek"},{"full_name":"Lorenc, Dusan","first_name":"Dusan","id":"40D8A3E6-F248-11E8-B48F-1D18A9856A87","last_name":"Lorenc"},{"full_name":"Ashourishokri, Younes","first_name":"Younes","id":"e32c111f-f6e0-11ea-865d-eb955baea334","last_name":"Ashourishokri"},{"last_name":"Zhumekenov","first_name":"Ayan","full_name":"Zhumekenov, Ayan"},{"full_name":"Bakr, Osman M.","first_name":"Osman M.","last_name":"Bakr"},{"last_name":"Lemeshko","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-6990-7802","first_name":"Mikhail","full_name":"Lemeshko, Mikhail"},{"full_name":"Alpichshev, Zhanybek","first_name":"Zhanybek","orcid":"0000-0002-7183-5203","id":"45E67A2A-F248-11E8-B48F-1D18A9856A87","last_name":"Alpichshev"}]}]