[{"day":"13","quality_controlled":"1","ec_funded":1,"abstract":[{"text":"Nominally identical materials exchange net electric charge during contact through a mechanism that is still debated. ‘Mosaic models’, in which surfaces are presumed to consist of a random patchwork of microscopic donor/acceptor sites, offer an appealing explanation for this phenomenon. However, recent experiments have shown that global differences persist even between same-material samples, which the standard mosaic framework does not account for. Here, we expand the mosaic framework by incorporating global differences in the densities of donor/acceptor sites. We develop\r\nan analytical model, backed by numerical simulations, that smoothly connects the global and deterministic charge transfer of different materials to the local and stochastic mosaic picture normally associated with identical materials. Going further, we extend our model to explain the effect of contact asymmetries during sliding, providing a plausible explanation for reversal of charging sign that has been observed experimentally.","lang":"eng"}],"intvolume":"         7","publication":"Physical Review Materials","title":"Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts","publication_status":"published","corr_author":"1","has_accepted_license":"1","month":"06","scopus_import":"1","volume":7,"publication_identifier":{"issn":["2475-9953"]},"oa":1,"acknowledgement":"This project has received funding from the European Research Council Grant Agreement No. 949120 and from\r\nthe European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant\r\nAgreement No. 754411. ","arxiv":1,"project":[{"_id":"0aa60e99-070f-11eb-9043-a6de6bdc3afa","call_identifier":"H2020","name":"Tribocharge: a multi-scale approach to an enduring problem in physics","grant_number":"949120"},{"name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","_id":"260C2330-B435-11E9-9278-68D0E5697425","grant_number":"754411"}],"language":[{"iso":"eng"}],"author":[{"full_name":"Grosjean, Galien M","orcid":"0000-0001-5154-417X","first_name":"Galien M","id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","last_name":"Grosjean"},{"first_name":"Scott R","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","last_name":"Waitukaitis","full_name":"Waitukaitis, Scott R","orcid":"0000-0002-2299-3176"}],"article_processing_charge":"No","citation":{"mla":"Grosjean, Galien M., and Scott R. Waitukaitis. “Asymmetries in Triboelectric Charging: Generalizing Mosaic Models to Different-Material Samples and Sliding Contacts.” <i>Physical Review Materials</i>, vol. 7, no. 6, 065601, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/physrevmaterials.7.065601\">10.1103/physrevmaterials.7.065601</a>.","ieee":"G. M. Grosjean and S. R. Waitukaitis, “Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts,” <i>Physical Review Materials</i>, vol. 7, no. 6. American Physical Society, 2023.","short":"G.M. Grosjean, S.R. Waitukaitis, Physical Review Materials 7 (2023).","chicago":"Grosjean, Galien M, and Scott R Waitukaitis. “Asymmetries in Triboelectric Charging: Generalizing Mosaic Models to Different-Material Samples and Sliding Contacts.” <i>Physical Review Materials</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/physrevmaterials.7.065601\">https://doi.org/10.1103/physrevmaterials.7.065601</a>.","ista":"Grosjean GM, Waitukaitis SR. 2023. Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts. Physical Review Materials. 7(6), 065601.","ama":"Grosjean GM, Waitukaitis SR. Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts. <i>Physical Review Materials</i>. 2023;7(6). doi:<a href=\"https://doi.org/10.1103/physrevmaterials.7.065601\">10.1103/physrevmaterials.7.065601</a>","apa":"Grosjean, G. M., &#38; Waitukaitis, S. R. (2023). Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts. <i>Physical Review Materials</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevmaterials.7.065601\">https://doi.org/10.1103/physrevmaterials.7.065601</a>"},"isi":1,"department":[{"_id":"ScWa"}],"external_id":{"arxiv":["2304.12861"],"isi":["001019565900002"]},"date_updated":"2025-04-14T07:43:55Z","doi":"10.1103/physrevmaterials.7.065601","oa_version":"Submitted Version","file_date_updated":"2023-07-07T12:49:51Z","article_number":"065601","_id":"13197","file":[{"checksum":"75584730d9cdd50eeccb4c52c509776d","access_level":"open_access","date_updated":"2023-07-07T12:49:51Z","creator":"ggrosjea","file_size":1127040,"file_name":"Mosaic_asymmetries.pdf","file_id":"13198","relation":"main_file","date_created":"2023-07-07T12:49:51Z","content_type":"application/pdf","success":1}],"issue":"6","ddc":["537"],"year":"2023","publisher":"American Physical Society","article_type":"original","type":"journal_article","date_created":"2023-07-07T12:48:01Z","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","keyword":["Physics and Astronomy (miscellaneous)","General Materials Science"],"date_published":"2023-06-13T00:00:00Z","status":"public"},{"author":[{"last_name":"Grosjean","first_name":"Galien M","id":"0C5FDA4A-9CF6-11E9-8939-FF05E6697425","orcid":"0000-0001-5154-417X","full_name":"Grosjean, Galien M"},{"full_name":"Wald, Sebastian","orcid":"0000-0002-5869-1604","first_name":"Sebastian","id":"133F200A-B015-11E9-AD41-0EDAE5697425","last_name":"Wald"},{"full_name":"Sobarzo Ponce, Juan Carlos A","last_name":"Sobarzo Ponce","first_name":"Juan Carlos A","id":"4B807D68-AE37-11E9-AC72-31CAE5697425"},{"full_name":"Waitukaitis, Scott R","orcid":"0000-0002-2299-3176","id":"3A1FFC16-F248-11E8-B48F-1D18A9856A87","first_name":"Scott R","last_name":"Waitukaitis"}],"language":[{"iso":"eng"}],"project":[{"_id":"260C2330-B435-11E9-9278-68D0E5697425","name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","grant_number":"754411"}],"isi":1,"article_processing_charge":"Yes","citation":{"mla":"Grosjean, Galien M., et al. “Quantitatively Consistent Scale-Spanning Model for Same-Material Tribocharging.” <i>Physical Review Materials</i>, vol. 4, no. 8, 082602, American Physical Society, 2020, doi:<a href=\"https://doi.org/10.1103/PhysRevMaterials.4.082602\">10.1103/PhysRevMaterials.4.082602</a>.","ieee":"G. M. Grosjean, S. Wald, J. C. A. Sobarzo Ponce, and S. R. Waitukaitis, “Quantitatively consistent scale-spanning model for same-material tribocharging,” <i>Physical Review Materials</i>, vol. 4, no. 8. American Physical Society, 2020.","chicago":"Grosjean, Galien M, Sebastian Wald, Juan Carlos A Sobarzo Ponce, and Scott R Waitukaitis. “Quantitatively Consistent Scale-Spanning Model for Same-Material Tribocharging.” <i>Physical Review Materials</i>. American Physical Society, 2020. <a href=\"https://doi.org/10.1103/PhysRevMaterials.4.082602\">https://doi.org/10.1103/PhysRevMaterials.4.082602</a>.","ista":"Grosjean GM, Wald S, Sobarzo Ponce JCA, Waitukaitis SR. 2020. Quantitatively consistent scale-spanning model for same-material tribocharging. Physical Review Materials. 4(8), 082602.","apa":"Grosjean, G. M., Wald, S., Sobarzo Ponce, J. C. A., &#38; Waitukaitis, S. R. (2020). Quantitatively consistent scale-spanning model for same-material tribocharging. <i>Physical Review Materials</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevMaterials.4.082602\">https://doi.org/10.1103/PhysRevMaterials.4.082602</a>","ama":"Grosjean GM, Wald S, Sobarzo Ponce JCA, Waitukaitis SR. Quantitatively consistent scale-spanning model for same-material tribocharging. <i>Physical Review Materials</i>. 2020;4(8). doi:<a href=\"https://doi.org/10.1103/PhysRevMaterials.4.082602\">10.1103/PhysRevMaterials.4.082602</a>","short":"G.M. Grosjean, S. Wald, J.C.A. Sobarzo Ponce, S.R. Waitukaitis, Physical Review Materials 4 (2020)."},"oa":1,"arxiv":1,"acknowledgement":"We would like to thank Philip Born, Bartosz Grzybowski, Tarik Baytekin, and Bilge Baytekin for helpful discussions.\r\nThis project has received funding from the European Unions Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 754411.","publication_identifier":{"issn":["2475-9953"]},"volume":4,"month":"08","scopus_import":"1","publication":"Physical Review Materials","intvolume":"         4","abstract":[{"text":"By rigorously accounting for mesoscale spatial correlations in donor/acceptor surface properties, we develop a scale-spanning model for same-material tribocharging. We find that mesoscale correlations affect not only the magnitude of charge transfer but also the fluctuations—suppressing otherwise overwhelming charge-transfer variability that is not observed experimentally. We furthermore propose a generic theoretical mechanism by which the mesoscale features might emerge, which is qualitatively consistent with other proposals in the literature.","lang":"eng"}],"has_accepted_license":"1","title":"Quantitatively consistent scale-spanning model for same-material tribocharging","corr_author":"1","publication_status":"published","ec_funded":1,"day":"17","quality_controlled":"1","status":"public","date_published":"2020-08-17T00:00:00Z","date_created":"2020-07-07T11:33:54Z","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","keyword":["electric charge","tribocharging","soft matter","granular materials","polymers"],"article_type":"original","type":"journal_article","publisher":"American Physical Society","ddc":["530"],"issue":"8","year":"2020","license":"https://creativecommons.org/licenses/by/4.0/","file_date_updated":"2020-08-17T15:54:20Z","oa_version":"Published Version","article_number":"082602","_id":"8101","file":[{"relation":"main_file","content_type":"application/pdf","success":1,"date_created":"2020-08-17T15:54:20Z","date_updated":"2020-08-17T15:54:20Z","access_level":"open_access","checksum":"288fef1eeb6540c6344bb8f7c8159dc9","file_id":"8277","file_size":853753,"file_name":"Grosjean2020.pdf","creator":"ggrosjea"}],"tmp":{"short":"CC BY (4.0)","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)"},"doi":"10.1103/PhysRevMaterials.4.082602","external_id":{"arxiv":["2006.07120"],"isi":["000561897000001"]},"date_updated":"2025-04-23T08:51:12Z","related_material":{"record":[{"id":"12697","relation":"popular_science","status":"public"}]},"department":[{"_id":"ScWa"}]},{"intvolume":"         3","abstract":[{"text":"We study the electronic structure of delafossite PtCoO2 to elucidate its extremely small resistivity and high mobility. The band exhibits steep dispersion near the Fermi level despite the fact that it is formed mainly by Pt 𝑑 orbitals that are typically localized. We propose a picture based on two hidden kagome-lattice-like electronic structures: one originating from Pt 𝑠+𝑝𝑥/𝑝𝑦 orbitals, and the other from Pt 𝑑3⁢𝑧2−𝑟2+𝑑𝑥⁢𝑦/𝑑𝑥2−𝑦2 orbitals, each placed on the bonds of the triangular lattice. In particular, we find that the underlying Pt 𝑠+𝑝𝑥/𝑝𝑦 bands actually determine the steepness of the original dispersion, so that the large Fermi velocity can be attributed to the large width of the Pt 𝑠+𝑝𝑥/𝑝𝑦 band. In addition, the kagome-like electronic structure gives rise to “orbital-momentum locking” on the Fermi surface, which reduces the electron scattering by impurities. We conclude that the combination of the large Fermi velocity and the orbital-momentum locking is likely to be the origin of the extremely small resistivity in PtCoO2.","lang":"eng"}],"publication":"Physical Review Materials","OA_place":"repository","publication_status":"published","title":"Hidden kagome-lattice picture and origin of high conductivity in delafossite PtCoO2","OA_type":"green","day":"12","quality_controlled":"1","main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.1812.07213"}],"language":[{"iso":"eng"}],"author":[{"last_name":"Usui","first_name":"Hidetomo","full_name":"Usui, Hidetomo"},{"full_name":"Ochi, Masayuki","first_name":"Masayuki","last_name":"Ochi"},{"full_name":"Kitamura, Sota","last_name":"Kitamura","first_name":"Sota"},{"first_name":"Takashi","last_name":"Oka","full_name":"Oka, Takashi"},{"first_name":"Daisuke","last_name":"Ogura","full_name":"Ogura, Daisuke"},{"full_name":"Rosner, Helge","last_name":"Rosner","first_name":"Helge"},{"full_name":"Haverkort, Maurits W.","first_name":"Maurits W.","last_name":"Haverkort"},{"full_name":"Sunko, Veronika","orcid":"0000-0003-2724-3523","first_name":"Veronika","id":"23cb1cf6-2c7a-11ef-91a4-f72fc19f20b3","last_name":"Sunko"},{"first_name":"Philip D. C.","last_name":"King","full_name":"King, Philip D. C."},{"last_name":"Mackenzie","first_name":"Andrew P.","full_name":"Mackenzie, Andrew P."},{"last_name":"Kuroki","first_name":"Kazuhiko","full_name":"Kuroki, Kazuhiko"}],"citation":{"mla":"Usui, Hidetomo, et al. “Hidden Kagome-Lattice Picture and Origin of High Conductivity in Delafossite PtCoO2.” <i>Physical Review Materials</i>, vol. 3, no. 4, 045002, American Physical Society, 2019, doi:<a href=\"https://doi.org/10.1103/physrevmaterials.3.045002\">10.1103/physrevmaterials.3.045002</a>.","ieee":"H. Usui <i>et al.</i>, “Hidden kagome-lattice picture and origin of high conductivity in delafossite PtCoO2,” <i>Physical Review Materials</i>, vol. 3, no. 4. American Physical Society, 2019.","short":"H. Usui, M. Ochi, S. Kitamura, T. Oka, D. Ogura, H. Rosner, M.W. Haverkort, V. Sunko, P.D.C. King, A.P. Mackenzie, K. Kuroki, Physical Review Materials 3 (2019).","chicago":"Usui, Hidetomo, Masayuki Ochi, Sota Kitamura, Takashi Oka, Daisuke Ogura, Helge Rosner, Maurits W. Haverkort, et al. “Hidden Kagome-Lattice Picture and Origin of High Conductivity in Delafossite PtCoO2.” <i>Physical Review Materials</i>. American Physical Society, 2019. <a href=\"https://doi.org/10.1103/physrevmaterials.3.045002\">https://doi.org/10.1103/physrevmaterials.3.045002</a>.","ista":"Usui H, Ochi M, Kitamura S, Oka T, Ogura D, Rosner H, Haverkort MW, Sunko V, King PDC, Mackenzie AP, Kuroki K. 2019. Hidden kagome-lattice picture and origin of high conductivity in delafossite PtCoO2. Physical Review Materials. 3(4), 045002.","apa":"Usui, H., Ochi, M., Kitamura, S., Oka, T., Ogura, D., Rosner, H., … Kuroki, K. (2019). Hidden kagome-lattice picture and origin of high conductivity in delafossite PtCoO2. <i>Physical Review Materials</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevmaterials.3.045002\">https://doi.org/10.1103/physrevmaterials.3.045002</a>","ama":"Usui H, Ochi M, Kitamura S, et al. Hidden kagome-lattice picture and origin of high conductivity in delafossite PtCoO2. <i>Physical Review Materials</i>. 2019;3(4). doi:<a href=\"https://doi.org/10.1103/physrevmaterials.3.045002\">10.1103/physrevmaterials.3.045002</a>"},"article_processing_charge":"No","oa":1,"arxiv":1,"publication_identifier":{"issn":["2475-9953"]},"scopus_import":"1","month":"04","volume":3,"oa_version":"Preprint","_id":"19825","article_number":"045002","doi":"10.1103/physrevmaterials.3.045002","external_id":{"arxiv":["1812.07213"]},"extern":"1","date_updated":"2025-06-11T06:05:56Z","date_published":"2019-04-12T00:00:00Z","status":"public","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_created":"2025-06-10T09:22:04Z","publisher":"American Physical Society","article_type":"original","type":"journal_article","issue":"4","year":"2019"}]