Abstract
An examination of the properties of many-electron conduction through spin-degenerate systems can lead to situations where increasing the bias voltage applied to the system is predicted to decrease the current flowing through it, for the electrons of a particular spin. While this does not necessarily constitute negative differential conductance (NDC) per se, it is an example of negative differential conductance per spin (NDSC) which, to our knowledge, is discussed here for the first time. Within a many-body master equation approach which accounts for charging effects in the Coulomb blockade regime, we show how this might occur.
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