Unconventional field-induced spin density wave phases in quasi-one-dimensional conductors in high magnetic fields

It is known that the field-induced spin-density-wave (FISDW) phases are experimentally observed in the quasi-one-dimensional (Q1D) organic conductors with chemical formula (TMTSF_{) 2}X (X =PF₆ , ClO₄, etc.) and some others in moderate magnetic fields. From a theoretical point of view, they appear as a result of "one dimensionalization" of the Q1D electron spectra due to the orbital electron effect in a magnetic field. We predict that the novel FISDW phases with different physical meaning have to appear in inclined high magnetic fields in Q1D conductors as a result of combination of the spin-splitting and orbital electron effects. We suggest performing the corresponding experiments in the (TMTSF_{) 2}X materials.