Conveners
R2-4 Quantum Materials II (DCMMP) | Matériaux quantiques II (DPMCM)
- Tamar Pereg-Barnea (McGill University)
Presentation materials
Halide double perovskites are of interest due to their potential as high efficiency solar cell materials while eliminating toxicity and stability issues that affect current high efficiency perovskites[1]. Within this family, Cs2AgBiBr6 has advantageous characteristics as a solar cell material including strong absorption and long carrier lifetimes[2]. While a cubic to tetragonal structural...
The chalcogenides are a family of layered compounds that exhibit interesting properties. As2Te3 is a layered chalcogenide that has α, β and β′ polymorphic phases. β-As2Te3 exhibits significantly different electronic properties when compared to α-As2Te3, with the former metallic with significantly lower resistivity and the latter behaving as a typical semiconductor. Below a...
Dangling bonds (DBs) on a hydrogen terminated Si(100)-2x1 surface are silicon atoms unbound to hydrogen atoms. They are point defects with electronic states in the band gap. Placing DBs at strategic locations on the surface enables them to be used as fundamental components for atom-defined electronics. In this work, we use low temperature scanning tunneling microscopy techniques to create...
Pure and gold-doped amorphous silicon membranes were irradiated with swift heavy ions (75
MeV Ag or 1.1 GeV Au ions) and studied by small angle X-ray scattering. The samples that
were irradiated with 1.1 GeV Au ions produced a scattering pattern consistent with core-shell type
ion tracks of 2.0 ± 0.1 nm (core) and 7.0 ± 0.3 nm (total) radius irrespective of gold doping and
consistent with...
Superconducting Radio-frequency (SRF) technology provides the cutting-edge technology that enables high performance acceleration for modern accelerator projects. RF losses are a major cost driver that both limit gradient and increase cryogenic demand. TRIUMF and U. Victoria have an active program in characterizing loss mechanisms in SRF materials using both muSR and beta-NMR. At TRIUMF, a...
