Intrasubband and intersubband electron relaxation in semiconductor quantum wire structures

Article

关键词: EXCITATION SPECTRUM;    PHONON SYSTEM;    GAS;    SPECTROSCOPY;    DISPERSION;    LIFETIME;   

DOI  :  10.1103/PhysRevB.63.045324

来源: SCIE

【 摘 要 】

We calculate the intersubband and intrasubband many-body inelastic Coulomb scattering rates due to electron-electron interaction in two-subband semiconductor quantum wire structures. We analyze our relaxation rates in terms of contributions from inter- and intrasubband charge-density excitations separately. We show that the intersubband (intrasubband) charge-density excitations are primarily responsible for intersubband (intrasubband) inelastic scattering. We identify the contributions to the inelastic-scattering rate coming from the emission of the single-particle and the collective excitations individually. We obtain the lifetime of hot electrons injected in each subband as a function of the total charge density in the wire.

【 授权许可】

Free