Abstract
We compare our optical data collected for two families of low-dimensionalcorrelated electron systems: the ladders and the organic Bechgaard salts. Our datadisplay a remarkable optical anisotropy between the spectra along the threecrystallographic axes, indicative of the low dimensionality in the electronicband structure. Moreover, we optically identify a dimensionality crossover,induced by Ca doping in the ladders and by chemical pressure in theBechgaard salts. An outlook on the ongoing research on carbon and MoS2nanotubes, as novel one-dimensional quantum wires, is also addressed.
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