Open questions in the physics of quasi-one-dimensional metals

摘要: The dc conductivity, spin susceptibility and 2kF 4kF structural instabilities for a one-band one-dimensional conductor are reviewed in the limiting cases of very weak strong electron-electron repulsions. experimental evidence from X-ray neutron scattering, EPR conductivity various members alloy series (TTF)1−x(TSeF)x-TCNQ is analyzed terms predictions these two cases. It concluded that even relative strength repulsions on kinds stacks must still be considered an open question. superstructural behavior this semiconducting phase also with particular emphasis relation superlattice dimension a′ along axis to tendencies show instabilities. original picture, so relatively satisfactory TTF-TCNQ, becomes less as more diagram explored. Though models have been proposed explain parts diagram, general statistical mechanical theory, presumably including non-nearest-neighbor competing interactions, higher-order disorder, needed.