Electrical resistivity, heavy electron

We now give a simple application of the present method to Plutonium which is a good test case. Pu lies between light actinides with itinerant 5/ electrons and heavy actinides with localized 5/ electrons. The competition between these two electronic regimes in Pu is responsible for a lot of unusual properties as large values of the linear term in the specific heat coefficient and of the electrical resistivity or a very complex phase diagram. 

Similar information can be also obtained by the ESR linewidth as a function of temperature, dominated by the Elliott mechanism through the spin-orbit coupling. It could possibly yield temperature dependence of the electrical resistivity if it were analyzed together with the g-shift and/or g-shift anisotropy and the spin dynamics data. It is noteworthy that a variety of temperature dependences are uniformly understandable with a single formulation characteristic of one-dimensional electronic systems. This mechanism is observable only in polymers with heavy nuclei, such as alkali and sulphur. It is also worth noting that the dopant nuclei could contribute to the Elliott mechanism in the donor dopant systems. Contrary to this, nuclei in the acceptor dopants could contribute little, Such a difference reflects each electronic state. Further investigation makes clear these points. 

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