G. T. Andrews

activity

20202023

collaborators

5 papers

physics.optics2023

Visible and ultraviolet plasma lines of the He-Ne gas laser

B. D. E. McNiven, M. J. Clouter, G. Todd Andrews

A study of Helium-Neon laser plasma lines was done using a double grating spectrometer and a He-Ne laser with an emission wavelength of 632.8 nm (15,802 cm $^{- 1}$ ). The absolute wa…

cond-mat.mtrl-sci2022

Contact Angle Studies on Porous Silicon: Evidence for Heterogeneous Wetting and Implications of Oxidation

S. J. Spencer, C. G. Deacon, G. T. Andrews

A study of wetting was carried out on porous silicon films with pore diameters spanning three orders of magnitude. Water contact angle measurements on adjoining porous and nonporou…

cond-mat.mtrl-sci2022

Influence of incommensurate structure on the elastic constants of crystalline Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$ by Brillouin light scattering spectroscopy

B. D. E. McNiven, J. P. F. LeBlanc, G. T. Andrews

Brillouin light scattering spectroscopy was used to probe the room-temperature elasticity of crystalline high- $T_{c}$ superconductor Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$ . A complete set of…

cond-mat.str-el2021

Single particle properties of the 2D Hubbard model for real frequencies at weak coupling: Breakdown of the Dyson series for partial self-energy expansions

Bradley D. E. McNiven, G. Todd Andrews, James P. F. LeBlanc

We generate the perturbative expansion of the single-particle Green's function and related self-energy for a half-filled single-band Hubbard model on a square lattice. We invoke al…

cond-mat.supr-con2020

Optical Constants of Crystalline Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$ by Brillouin Light Scattering Spectroscopy