{"year":"2023","volume":19,"intvolume":"        19","isi":1,"acknowledgement":"We acknowledge the crucial contribution of the LULI2000 laser and support teams to the success of the experiments. We also thank S. Brygoo and P. Loubeyre for useful discussions. This research was supported by the French National Research Agency (ANR) through the projects POMPEI (grant no. ANR-16-CE31-0008) and SUPER-ICES (grant ANR-15-CE30-008-01), and by the PLAS@PAR Federation. M.F. and R.R. gratefully acknowledge support by the DFG within the Research Unit FOR 2440. M.B. was supported by the European Union within the Marie Skłodowska-Curie actions (xICE grant 894725) and the NOMIS foundation. The DFT-MD calculations were performed at the North-German Supercomputing Alliance facilities.","publication_identifier":{"eissn":["1745-2481"],"issn":["1745-2473"]},"external_id":{"isi":["000996921200001"]},"page":"1280-1285","doi":"10.1038/s41567-023-02074-8","author":[{"full_name":"Hernandez, J.-A.","last_name":"Hernandez","first_name":"J.-A."},{"full_name":"Bethkenhagen, Mandy","id":"201939f4-803f-11ed-ab7e-d8da4bd1517f","last_name":"Bethkenhagen","first_name":"Mandy","orcid":"0000-0002-1838-2129"},{"last_name":"Ninet","first_name":"S.","full_name":"Ninet, S."},{"first_name":"M.","last_name":"French","full_name":"French, M."},{"full_name":"Benuzzi-Mounaix, A.","last_name":"Benuzzi-Mounaix","first_name":"A."},{"first_name":"F.","last_name":"Datchi","full_name":"Datchi, F."},{"last_name":"Guarguaglini","first_name":"M.","full_name":"Guarguaglini, M."},{"first_name":"F.","last_name":"Lefevre","full_name":"Lefevre, F."},{"full_name":"Occelli, F.","first_name":"F.","last_name":"Occelli"},{"first_name":"R.","last_name":"Redmer","full_name":"Redmer, R."},{"full_name":"Vinci, T.","first_name":"T.","last_name":"Vinci"},{"full_name":"Ravasio, A.","last_name":"Ravasio","first_name":"A."}],"publication":"Nature Physics","language":[{"iso":"eng"}],"_id":"13118","citation":{"ieee":"J.-A. Hernandez <i>et al.</i>, “Melting curve of superionic ammonia at planetary interior conditions,” <i>Nature Physics</i>, vol. 19. Springer Nature, pp. 1280–1285, 2023.","mla":"Hernandez, J. A., et al. “Melting Curve of Superionic Ammonia at Planetary Interior Conditions.” <i>Nature Physics</i>, vol. 19, Springer Nature, 2023, pp. 1280–85, doi:<a href=\"https://doi.org/10.1038/s41567-023-02074-8\">10.1038/s41567-023-02074-8</a>.","short":"J.-A. Hernandez, M. Bethkenhagen, S. Ninet, M. French, A. Benuzzi-Mounaix, F. Datchi, M. Guarguaglini, F. Lefevre, F. Occelli, R. Redmer, T. Vinci, A. Ravasio, Nature Physics 19 (2023) 1280–1285.","ama":"Hernandez J-A, Bethkenhagen M, Ninet S, et al. Melting curve of superionic ammonia at planetary interior conditions. <i>Nature Physics</i>. 2023;19:1280-1285. doi:<a href=\"https://doi.org/10.1038/s41567-023-02074-8\">10.1038/s41567-023-02074-8</a>","chicago":"Hernandez, J.-A., Mandy Bethkenhagen, S. Ninet, M. French, A. Benuzzi-Mounaix, F. Datchi, M. Guarguaglini, et al. “Melting Curve of Superionic Ammonia at Planetary Interior Conditions.” <i>Nature Physics</i>. Springer Nature, 2023. <a href=\"https://doi.org/10.1038/s41567-023-02074-8\">https://doi.org/10.1038/s41567-023-02074-8</a>.","ista":"Hernandez J-A, Bethkenhagen M, Ninet S, French M, Benuzzi-Mounaix A, Datchi F, Guarguaglini M, Lefevre F, Occelli F, Redmer R, Vinci T, Ravasio A. 2023. Melting curve of superionic ammonia at planetary interior conditions. Nature Physics. 19, 1280–1285.","apa":"Hernandez, J.-A., Bethkenhagen, M., Ninet, S., French, M., Benuzzi-Mounaix, A., Datchi, F., … Ravasio, A. (2023). Melting curve of superionic ammonia at planetary interior conditions. <i>Nature Physics</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41567-023-02074-8\">https://doi.org/10.1038/s41567-023-02074-8</a>"},"article_type":"original","scopus_import":"1","publisher":"Springer Nature","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_created":"2023-06-04T22:01:02Z","oa_version":"None","related_material":{"link":[{"url":"10.1038/s41567-023-02130-3","relation":"erratum"}]},"status":"public","quality_controlled":"1","title":"Melting curve of superionic ammonia at planetary interior conditions","date_updated":"2023-11-14T12:58:31Z","article_processing_charge":"No","month":"09","day":"01","type":"journal_article","abstract":[{"lang":"eng","text":"Under high pressures and temperatures, molecular systems with substantial polarization charges, such as ammonia and water, are predicted to form superionic phases and dense fluid states with dissociating molecules and high electrical conductivity. This behaviour potentially plays a role in explaining the origin of the multipolar magnetic fields of Uranus and Neptune, whose mantles are thought to result from a mixture of H2O, NH3 and CH4 ices. Determining the stability domain, melting curve and electrical conductivity of these superionic phases is therefore crucial for modelling planetary interiors and dynamos. Here we report the melting curve of superionic ammonia up to 300 GPa from laser-driven shock compression of pre-compressed samples and atomistic calculations. We show that ammonia melts at lower temperatures than water above 100 GPa and that fluid ammonia’s electrical conductivity exceeds that of water at conditions predicted by hot, super-adiabatic models for Uranus and Neptune, and enhances the conductivity in their fluid water-rich dynamo layers."}],"department":[{"_id":"BiCh"}],"date_published":"2023-09-01T00:00:00Z","publication_status":"published"}