Conveners
M4-1 Condensed Matter Theory (DCMMP/DTP) | Théorie de la matière condensée (DPMCM/DPT)
- Svetlana Barkanova (Acadia University)
Presentation materials
The methods of finite group theory are a powerful means of reducing the complexity of highly symmetric crystals such as the rare-earth pyrochlores. In these materials, the rare-earth ions are located at the vertices of a network of corner-sharing tetrahedra, an arrangement known as "geometric frustration". The family of rare-earth pyrochlores has a diverse membership which exhibit a variety of...
Since crystals are made of periodic structures in space, how to determine their three independent period vectors (starting from any values) is a basic physics problem. One choice is to minimize (Gibbs) energy or enthalpy for the situation where crystals are under constant external pressure. For crystals under constant external stress, we derived dynamical equations of the period vectors, for...
Granular chains have numerous applications, ranging from shock absorption and vibration reduction, to detecting buried objects, to energy localization. As energy is transferred between grains they deform slightly, and the contact potential arising from the elastic deformation of grains is given by the Hertz law. The discrete nature of these systems in combination with the nonlinear contact...
Graphene as a zero-bandgap two-dimensional semiconductor with a linear electron band dispersion
near the Dirac points has potential to exhibit very interesting nonlinear optical properties [1]. In particular, third harmonic generation of terahertz (THz) radiation should occur both due to the nonlinear relationship between the crystal momentum and the current density, and due to the...
I will give a general update of our photoemission endstations at Canadian Light Source Inc. first, present some recent work in VUV photoemission (UPS) and hard x-ray photoemission (HXPS). I will also introduce the new angular resolved photoemission spectroscopy capability at CLS in the coming year.
The idea of using photonic crystals (PCs) to alter the dispersion relation of photons has received widespread interest. However, most of the existing research focused on the stationary PCs, while moving PCs were somewhat overlooked. In this abstract, we explore the guidance properties of moving hollow-core (HC) PCs. We find that the interaction between light and a moving HC-PC can lead to...
