Carrier renormalization effects on the optical response of doped semiconducting single-walled-carbon nanotubes

ORAL

Abstract

It is known that many-electron effects dramatically change the optical properties of single-walled carbon nanotubes (SWCNTs). Recently, researchers have succeeded in tuning the Fermi energy of an individual SWCNT by applying a gate voltage or by introducing adsorbate dopants. Therefore, the optical response of doped SWCNTs is not only interesting from a pure scientific point of view but also important for the application of these systems. We present here first-principles calculations, based on the GW-Bethe Salpeter equation (GW-BSE) approach, of the quasiparticle (single-particle excitation) spectrum and the optical (electron-hole excitation) spectrum of doped SWCNTs.

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Authors

  • Sheng Ju

    Department of Physics, University of California, Berkeley, California 94720, USA

  • Cheol-Hwan Park

    The department of Physics, University of California at Berkeley and Materials Sciences Division, Lawrence Berkeley National Laboratory, Department of Physics, University of California, Berkeley, California 94720, USA and Materials Science Division, Lawrence Berkeley National Laboratory

  • Steven Louie

    Department of Physics, University of California, Berkeley, California 94720, USA and Materials Science Division, Lawrence Berkeley National Laboratory