More than a decade ago, researchers discovered that when they added boron to the carbon structure of diamond, the combination was superconductive. Since then, growing interest has been generated in understanding these superconducting properties.

With this interest, a research group in India focused on a Fano resonance in a heavily boron-doped diamond (BDD) that involves the vibrational mode of diamond. The researchers, from the Indian Institute of Technology Madras, report their findings this week in Applied Physics Letters.

In probing the vibrational properties of BDD films, the researchers used Raman scattering and presented a comprehensive analysis of the Fano effect as a function of boron concentration and the excitation frequency used in the Raman measurement.