Nomadic polarization

It is, of course, recognized that there are polarization mechanisms with a fundamentally molecular basis in addition to the electronic and the dipolar orientation types referred to above. Indeed, the two other principal mechanisms, atomic and nomadic polarization, provide... 

The presence of nomadic polarization in biological materials can add substantially to the polarizability. The roving carriers can be mobile electrons, mobile holes, or even mobile ions such as or Na. ... 

Said another way, studying and understanding nomadic polarization in biological materials is often merely taking a look at the organic condition present in these materials, but from a very different viewpoint. 

H. A. Pohl, Quasi One-Dimensional Electronic Conduction and Nomadic Polarization in Polymers, J. Biol. Phys. 2, 113-172 (1974). 

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