Spin effects in quasi-one-dimensional conductors under magnetic field

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Abstract
We study the effect of the magnetic field on the relative stability of charge density wave, spin density wave, metallic or superconducting states of quasi-one-dimensional superconductors. First, we study the case of the one-dimensional electron gas in the g-ology model with a multiplicative renormalization group method with two cut-off energies. Then, three-dimensional couplings are simply taken into account by the decoupling of the Cooper and zero sound channels which interfere in one dimension. For a given set of interactions and neglecting diamagnetic effects, we find that a SDW state is stabilized under field. Applicability to the (TMTSF)2X compounds is discussed