Theory of the Linewidth of Intersubband Plasmons in Quantum Wells


URL: DOI:10.1103/PhysRevLett.87.037402Intersubband (ISB) plasmons in remotely doped wide quantum wells acquire a linewidth even at zero temperature and in-plane wave vector q∥ = 0 by a combination of intrinsic (electron-electron interaction) and extrinsic effects (impurities and interface roughness). We present a quantitatively accurate theory of the linewidth that treats both effects on equal footing and from first principles by a combination of time-dependent density-functional theory with the memory function formalism. Comparison with recent optical absorption experiments shows that the ISB plasmon linewidth has a significant contribution from electron-electron interaction, and is only weakly related to the mobility.This work was supported by NSF Grants No. DMR- 9706788 and No. DMR-0074959

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Last time updated on November 17, 2016

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