2022 CAP Congress / Congrès de l'ACP 2022

Session

R2-4 Quantum Materials II (DCMMP) | Matériaux quantiques II (DPMCM)

R2-4

9 Jun 2022, 10:45

McMaster University

Conveners

R2-4 Quantum Materials II (DCMMP) | Matériaux quantiques II (DPMCM)

• Tamar Pereg-Barnea (McGill University)

3072. Probing a Novel Low Temperature State in Cs2AgBiBr6 via Resonance Raman Spectroscopy and Photoluminescence

Collin Tower (Brock University)

09/06/2022, 10:45

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)

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...

3071. Psudogap formation at the β to β’ phase transition in the Chalcogenide As2Te3

Mr Jeremy Dion

09/06/2022, 11:00

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)

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...

3133. WITHDRAWN Atomically Defined Wires on P-Type Silicon

Furkan Altincicek (University of Alberta)

09/06/2022, 11:15

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)

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...

3482. Density changes in amorphous silicon provoked by swift heavy ions

Prof. Sjoerd Roorda

09/06/2022, 11:30

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral (Non-Student) / Orale (non-étudiant(e))

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...

3391. Beta-SRF at TRIUMF - A Unique Facility to Characterize SRF Materials Near Fundamental Limits

Edward Thoeng (TRIUMF)

09/06/2022, 11:45

Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM)

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)

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...