{"refrec":{"BRefID":302227,"RR":"<b>Soubiran, F.; Militzer, B.</b> (2018). Electrical conductivity and magnetic dynamos in magma oceans of Super-Earths. <i>Nature Comm. 9(1)</i>: 7 pp. <a href=\"https://dx.doi.org/10.1038/s41467-018-06432-6\" target=\"_blank\">https://dx.doi.org/10.1038/s41467-018-06432-6</a>","BEntID":294469,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Nature Comm. 9(1)</i>: 7 pp. <a href=\"https://dx.doi.org/10.1038/s41467-018-06432-6\" target=\"_blank\">https://dx.doi.org/10.1038/s41467-018-06432-6</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Soubiran, F.; Militzer, B.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Soubiran, F.; Militzer, B.","Englishabstract":"Super-Earths are extremely common among the numerous exoplanets that have been discovered. The high pressures and temperatures in their interiors are likely to lead to long-lived magma oceans. If their electrical conductivity is sufficiently high, the mantles of Super-Earth would generate their own magnetic fields. With ab initio simulations, we show that upon melting, the behavior of typical mantle silicates changes from semi-conducting to semi-metallic. The electrical conductivity increases and the optical properties are substantially modified. Melting could thus be detected with high-precision reflectivity measurements during the short time scales of shock experiments. We estimate the electrical conductivity of mantle silicates to be of the order of 100 Ω−1 cm−1, which implies that a magnetic dynamo process would develop in the magma oceans of Super-Earths if their convective velocities have typical values of 1 mm/s or higher. 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