  Significant attention has been drawn to electronic transport in chiral
materials coupled to ferromagnets in the chirality induced spin selectivity
(CISS) effect. A large magnetoresistance (MR) is usually observed which is
widely interpreted to originate from spin (dependent) transport. However, there
are severe discrepancies between the experimental results and theoretical
interpretations, most notably the apparent failure of the Onsager reciprocity
relation in the linear response regime. We provide an alternative explanation
for the mechanism of the two terminal MR in chiral systems coupled to a
ferromagnet. For this we point out that it was observed that the electrostatic
contact potential of chiral materials on a ferromagnet depends on the
magnetization direction and chirality. In our explanation this causes the
transport barrier to be modified by the magnetization direction, already in
equilibrium, in the absence of a bias current. This strongly alters the charge
transport through/over the barrier, not requiring spin transport. This provides
a mechanism that allows the linear response resistance to be sensitive to the
magnetization direction and also explains the failure of the Onsager
reciprocity relations. We propose experimental configurations to confirm our
alternative mechanism for MR.
