Width of phonon sidebands in the Brownian oscillator model

• Main Authors: Ye, Jun, Zhao, Yang, Ng, Nathaniel, Cao, Jianshu
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2011
• Subjects: DRNTU::Science::Chemistry::Physical chemistry::Solid state chemistry
• Online Access: https://hdl.handle.net/10356/101328; http://hdl.handle.net/10220/7401
• Institution: Nanyang Technological University

The line width dependence of zero-phonon lines and phonon sidebands on temperature, bath dissipation, and electron−phonon coupling is studied for an underdamped Brownian oscillator model with an Ohmic dissipative bath. Factors determining the line widths vary from the zero-phonon lines to the phonon sidebands. The control-parameter space of line broadening has been mapped out, revealing that the line widths of the zero-phonon lines and phonon sidebands are linearly dependent on both the temperature and the Huang−Rhys factor. It is also found that the dependence of the line widths on the bath damping factor is linear for the zero-phonon lines and quadratic for the phonon sidebands.