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Electron spin resonance driven photogalvanic effect in graphene-based structures

Year: 2026
Type: preprint
Abstract: We report an electron-spin-resonance-driven linear photogalvanic effect (LPGE) in unbiased monolayer graphene and WSe_2/graphene heterostructures. Under linearly polarized 45--75 GHz radiation, the photovoltage exhibits pronounced resonant features in both Faraday and Voigt geometries. Multiple resonances associated with the electron spin resonance in graphene are observed for both out-of-plane and in-plane magnetic-field orientations. Their magnetic-field positions vary linearly with frequency, their amplitudes reverse sign across the charge-neutrality point, and the resonant contribution has the opposite sign to the nonresonant Drude photogalvanic background. We develop a microscopic theory in which radiation-induced momentum alignment followed by skew scattering generates both contributions. Their opposite signs originate from the orthogonal momentum alignments produced by indirect Drude absorption and direct spin-resonant transitions. The theory describes well the main features of the observed resonant photocurrent and provides a microscopic description of ESR-induced LPGE in two-dimensional systems. These results establish the photogalvanic response as a probe of ESR in unbiased micron-scale graphene-based devices.
Authors: Bray, C., Yahniuk, I., Golub, L. E., Marocko, M., Consejo, C., Benhamou-Bui, B., Gan, Ziyang, George, A., Turchanin, A., Sadovyi, P., Watanabe, K., Taniguchi, T., Eroms, J., Fabian, J., Teppe, F., Ganichev, S. D.
Institutions: Centre National de la Recherche Scientifique, Université de Montpellier, Laboratoire Charles Coulomb, Institute of High Pressure Physics, University of Regensburg, Friedrich Schiller University Jena, Polish Academy of Sciences, National Institute for Materials Science, Research Center for Materials Nanoarchitectonics
Language: English
Open Access status: green
Funders: Equipex, Graphene Flagship, European Commission, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Ministry of Education, Culture, Sports, Science and Technology, Japan Society for the Promotion of Science, Core Research for Evolutional Science and Technology
Awards: G1412367570, G1957822890, G2350469352, G2442584775, G3297474809, G3866635697, G3899157429, G4091144171, G4162329948, Hybrid antimonide technologies, G4498736070, G4606801782, G4806815962, G5777085419, COMPosants électroniques pour l'imagerie TERAhertz, Dipolare Exzitonen und Kopplung zwischen Monolagen: Optik, Dynamik und Transport in JanusTMDHeterostrukturen, G692187525, G708600390, 2D Heterostructure Non-volatile Spin Memory Technology, G7842812455, SFB 1277: Emergente relativistische Effekte in der Kondensierten Materie: Von grundlegenden Aspekten zu elektronischer Funktionalität, G8918705045, G898758523, G977229675
OpenAlex ID: W7204606857
Cites: 1
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