RESONANT RAMAN-SCATTERING BY COLLECTIVE MODES OF THE ONE-DIMENSIONAL ELECTRON-GAS

We show that the low-energy peak in the polarized resonant Raman spect ra of quantum wires, which is commonly associated with ''single partic le excitations,'' can be interpreted as a signature of intraband colle ctive spin excitations. A broad maximum in the resonant depolarized sp ectra is predicted to exist above the frequency of the spin-density ex citation, due to simultaneous but independent propagation of spin- and charge-density modes. [S0031-9007(98)05345-9].