Abstract
A recent paper [R. H. Silsbee, Phys. Rev. B 63, 155305 (2001)] presented a phenomenological theory for experiments of Hammar et al. [Appl. Phys. Lett. 79, 2591 (2001)] probing the non-equilibrium spin polarization in a two-dimensional electron gas induced by an electric current. This paper develops a relation between the ``potentiometric signal'' and the ``diode signal'' in those experiments.
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