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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 TMTSF2X compounds is discussed.

Keywords : charge density waves Cooper pairs electron gas one dimensional conductivity renormalisation spin density waves superconducting materials zero sound quasione dimensional conductors quasione dimensional superconductors CDW states SDW states spin effects metallic states Cooper pair channels superconducting states one dimensional electron gas g ology model multiplicative renormalization group method three dimensional couplings decoupling zero sound channels TMTSF sub 2 X

Autor: G. Montambaux M. Héritier P. Lederer

Fuente: https://hal.archives-ouvertes.fr/


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