article published yes Abhishek Shiva Kumar author 5e9a6931-eb97-11eb-a6c2-e96f7058d77a Mikhail Maslov author 2E65BB0E-F248-11E8-B48F-1D18A9856A870000-0003-4074-2570 Mikhail Lemeshko author 37CB05FA-F248-11E8-B48F-1D18A9856A870000-0002-6990-7802 Artem Volosniev author 37D278BC-F248-11E8-B48F-1D18A9856A870000-0003-0393-5525 Zhanybek Alpichshev author 45E67A2A-F248-11E8-B48F-1D18A9856A870000-0002-7183-5203 GradSch department ZhAl department MiLe department 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. https://research-explorer.ista.ac.at/download/19531/19536/2025_njpQuantumMaterials_Kumar.pdf application/pdfno https://creativecommons.org/licenses/by-nc-nd/4.0/ Springer Nature2025 eng 2397-4648 00145983010000210.1038/s41535-025-00754-7 10 https://git.ista.ac.at/mmaslov/dirac_pauli_LHP 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> 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>. 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>. A. Shiva Kumar, M. Maslov, M. Lemeshko, A. Volosniev, Z. Alpichshev, Npj Quantum Materials 10 (2025). 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. 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. 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> 195312025-04-08T18:13:06Z2025-09-30T11:32:32Z