Dr. Amir Qamar BSc, PhD

I am a PhD candidate student and a member of the beamteam. My research involves discovering the electronic structure of novel materials. To accomplish this, I not only focus on the experimental aspects, but also perform Density Functional Theory (DFT) simulations. The experimental techniques I exploit include: 

• Non-resonant X-ray Emission Spectroscopy (NXES): Core level NXES is a powerful tool to probe the valence band of a material under investigation.
• Resonant X-ray Emission Spectroscopy (RXES): RXES also probes the local partial occupied density of states in the valence band. Here, the energy of the incident photons is selected to resonantly excite one of the core electrons.
• X-ray Absorption Spectroscopy: XAS makes it possible to probe the partial density of unoccupied states in the conduction band of a material under investigation.

The experiments are carried out at the Canadian Light Source (CLS) and Advanced Light Source (ALS). Lately I have been working on PbO films which are promising candidate for their use as direct conversion photodetectors. Another class of materials I am investigating is Na_xRu_yO_z. These materials are gaining interest of researchers due to their magnetic properties.

Publications:

1. X-ray spectroscopic study of various lead oxides for direct conversion imaging
   A. Qamar, K. LeBlanc, J. Lin, Y. Pan, A. Reznik, A. Moewes, Scientific reports 7, 13159 1-10 (2017).