Spin density wave states

Charge Density Wave and Spin Density Wave States... 

Fig. 8 Schematic phase diagram for the two-site E e system at half-filling in the g, J) space. AFO and SDW indicate, respectively, antiferro-orbital ordering and spin density wave states. The electronic state is specified by either the bare electron (Bare), the single-polaron (SP), or the bipolaron (BP). Parameters g, (Oo/t, and J/U are, respectively, chosen as 1, 1, 0.5 along the line 1...

The appeal to an admittedly restrictive model of repulsive -function interactions between the Fermions was motivated by the desire to compare and contrast with the Overhauser [7] spin density wave state. Strongly orthogonal two-body functions (geminals) were employed by Ede and myself in the above model problem. Such geminals have implications for low-order density matrices, which we shall discuss immediately below. 

Organic superconductivity now exists in two families of organic compounds. In the first series, (TMTSF)2X, the quasi-one-dimensionality manifests itself, first, in the competition between various ound states, which is governed by parameters such as the efficiency of Coulomb interactions, the amplitude of the interchain coupling, etc. and, secondly, in the remarkable field-induced spin density wave states. 

NONLINEAR ELECTRICAL TRANSPORT EFFECTS IN THE SPIN-DENSITY WAVE STATE OF THE ORGANIC CONDUCTORS (TMTSF>2X... 

Fig. 6.9. Schematic energy level diagram of the spin-density-wave states and the j = 1 members of the Mott-Hubbaxd exciton families. J = / U — Vi). The symmetry...

Figure 14 Chemical structure of halogen-bridged mixed-valence complex [M(en)2][MX2(en)2) + (M = Pt, Pd, Ni X = Cl, Br, I) and electronic structures. Counter anions are omitted for clarity, (a) Spin density wave state (SDW) (b) charge density wave state (CDW).

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