A detailed analysis of the Raman spectra in superconducting boron doped nanocrystalline diamond

TL;DR

This study investigates the Raman spectra of superconducting boron-doped nanocrystalline diamond, revealing Fano interference effects and wavelength-dependent anomalies in phonon-electron interactions.

Contribution

It provides a detailed analysis of the Raman spectral features and Fano lineshapes in superconducting boron-doped nanocrystalline diamond, highlighting new insights into its light scattering properties.

Findings

Fano interference observed in Raman spectra

Significant asymmetry in lineshape with q=-2

Wavelength dependence of Raman scattering amplitude

Abstract

The light scattering properties of superconducting (Tc=3.8 K) heavily boron doped nanocrystalline diamond has been investigated by Raman spectroscopy using visible excitations. Fano type interference of the zone-center phonon line and the electronic continuum was identified. Lineshape analysis reveals Fano lineshapes with a significant asymmetry (q=-2). An anomalous wavelength dependence and small value of the Raman scattering amplitude is observed in agreement with previous studies.