Upcoming Condensed Matter Talks

Thu, 2017-10-26 14:00 - 15:00
Igor Herbut, Simon Fraser University
AMPEL #311
Abrikosov proposed in 1974 that a 3D electronic system with its fermi level at the point of quadratic band crossing, as in the (spin-orbit coupled) gray tin or mercury telluride, should represent the simplest non-fermi liquid. I will review this idea and discuss how a non-fermi liquid ground state may become unstable to ordering via the mechanism of "fixed-point collision".
Thu, 2017-11-02 14:00 - 15:00
Paul Barclay, University of Calgary
AMPEL #311

Nano-optomechanical devices enhance the interaction between light and nanomechanical resonators, enabling coherent coupling between photons and mesoscopic phonons. When spin systems are attached to or embedded within these devices, technologies for nanoscale sensing, and for transducing quantum information between photons, phonons and spins become viable. In this talk I will illustrate this potential by presenting measurements of the susceptibility of nanomagnetic spin systems using optomechanical “split-beam” nanocavities [1].

Thu, 2017-11-16 14:00 - 15:00
Eundeok Mun, Department of Physics, Simon Fraser University
AMPEL #311

To date, magnetic frustration has primarily been studied in insulators. There have been little theoretical and experimental studies in magnetically frustrated conducting materials, where the localized moments reside on geometrically frustrated lattices (pyrochlore, kagome, triangular). For the 4f - electron metallic systems, the competition between Kondo and RKKY interactions results in a great variety of ground states, leading to a rich phase diagram, which can be tuned through a quantum critical point.

Thu, 2017-11-23 14:00 - 15:00
Igor Boettcher, Department of Physics, Simon Fraser University
AMPEL #311

A revolutionary new direction in the field of superconductivity emerged recently with the synthesis of superconductors with strong inherent spin-orbit coupling of electrons, such as the half-Heusler compounds YPtBi or LuPdBi. Due to band inversion, the low-energy degrees of freedom are electrons at a three-dimensional quadratic band touching point with an effective spin-3/2, which allows for Cooper pairs with spins ranging from 0 to 3.

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