Sassetti, M.; Napoli, F.; Kramer, B. - In: The European Physical Journal B - Condensed Matter and … 11 (1999) 4, pp. 643-654
Using the bosonization technique, a theory for the collective excitations of the interacting electrons in quantum wires with two subbands occupied is developed. The dispersion relations for the inter-subband charge and spin density excitations are determined. The results are used to interpret...