Events

SBQMI hosts numerous academic and other events throughout the year. Please search by audience or event type, or enter a keyword, to find events of interest to you.

If you are interested in inviting our faculty as keynote speakers at your event, or are a school group interested in visiting our labs, please contact us to submit your request.

Design and Manipulation of Functional Molecular Nanosystems

10 Aug2016

Speaker: Johannes Barth, Department of Physics, Technical University of Munich

Time: August 10, 2016, 2:00 - 3:00

Location: AMPEL 311

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Towards Realizing Topological Superconductivity in Quantum Wires

23 Jun2016

Speaker: Vincent Mourik, University of New South Wales

Time: June 23, 2016, 2:00 - 3:00

Location: Hennings 318

The engineering of topological superconductors and the observation and control of their non-abelian quasiparticles is a dominant effort in condensed matter physics, both out of fundamental interest and for their potential application in topological quantum computing. A one-dimensional semiconducting nanowire with strong spin-orbit interaction that is proximity coupled to a standard s-wave superconductor is a particularly attractive implementation of...

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Cross-Interface Electron-Photon Interactions in FeSe Films on Oxide Substrates

02 Jun2016

Speaker: Steve Johnston, University of Tennessee

Time: June 2, 2016, 2:00 - 3:00

Location: Hennings 318

A flurry of scientific activities has been generated by the discovery of a significantly enhanced superconductivity in ultra thin films of FeSe grown on oxide substrates such as SrTiO3 . At present there are two main groups of proposals for the origin of this enhancement: those involving excess electron doping by the substrate or those involving a more direct...

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Discovery of an Electronic Goldstone mode in the (Putative) Exitonic Insulator, 1T-TiSe2

27 May2016

Speaker: Peter Abbamonte, University of Illinois

Time: May 27, 2016, 2:00 - 3:00

Location: AMPEL 311

1T-TiSe2 is a layered, transition metal dichalcogenide that exhibits a competition between superconducting and charge density wave (CDW) ground states, mimicking many aspects of the phase diagram of high temperature superconductors. Because of its nearly inverted band structure, the CDW phase has often been interpreted as an “excitonic insulator” ground state formed via spontaneous proliferation of excitons with finite...

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Design Principles of Shift Current Photovoltaics

26 May2016

Speaker: Ashley Cook (U Toronto)

Time: May 26, 2016, 2:00 - 3:00

Location: Hennings 304

While the basic principles and limitations of conventional solar cells are well understood, relatively little attention has gone toward evaluating and maximizing the potential efficiency of photovoltaic devices based on shift currents. In this talk, we give a brief introduction to the shift current. We discuss its promise as a mechanism for high-performance, low-cost photovoltaics and how it may...

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Fluctuating Charge Order in the Optimally-Doped High Temperature Superconductor, Bi2Sr2CaCu2O8+x

26 May2016

Speaker: Peter Abbamonte, University of Illinois

Time: May 26, 2016, 11:00 - 12:00

Location: AMPEL 311

The field of high temperature superconductivity has been revolutionized by the recent discovery of charge order in most families of underdoped copper‐oxides. There are still fundamental mysteries, however, about how this order is related to superconductivity, i.e., whether it is present at optimal doping, whether it is static or fluctuating, etc.

In this talk I will present...

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Aspects of Ising-Nematic Quantum Critical Point

25 May2016

Speaker: Ipsita Mandal

Time: May 25, 2016, 2:00 - 3:00

Location: Hennings 304

We devise a renormalization group analysis for quantum field theories with Fermi surface to study scaling behaviour of non-Fermi liquid states in a controlled approximation. The non-Fermi liquid fixed points are identified from a Fermi surface in (m+1) spatial dimensions, while the co-dimension of Fermi surface is also extended to a generic value. We also study superconducting instability in...

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Transform & Diagonalize (T&D) Approaches to Electronic Structure with Applications to Molecular Spectroscopy

13 May2016

Speaker: Marcel Nooijen, Department of Chemistry, University of Waterloo

Time: May 13, 2016, 2:00 - 3:00

Location: Hennings 318

One of the remaining open challenges for quantum chemistry concerns the routine calculation of molecular systems that require a multireference description, and the simulation of their spectroscopic properties. Notoriously are molecules containing one or more transition metal atoms. I will describe a recent coupled cluster approach that enables the calculation of a large number of electronic states

...

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Quantum Criticality in Heavy Fermion Metals

12 May2016

Speaker: Emilian Marius Nica, Department of Physics and Astronomy & Rice Center for Quantum Materials, Rice University

Time: May 12, 2016, 2:00 - 3:00

Location: Hennings 318

Heavy fermion systems provide a prototype-setting for the study of strongly-correlated electrons. Experiments on heavy-fermion metals such as CeCu6-xAux, YbRh2Si2, and CeRhIn5 have generated a great deal of interest in the general context of magnetic quantum phase transitions and associated non-Fermi liquid behaviors. In contrast to transitions out of a spin-density-wave state, the suppression of magnetic order in these...

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Transient Dynamics of d-Wave Superconductors After a Sudden Excitation

21 Apr2016

Speaker: Francesco Peronaci, International School for Advanced Studies (SISSA)

Time: April 21, 2016, 2:00 - 3:00

Location: Hennings 318

Motivated by recent ultrafast pump-probe experiments on high-temperature superconductors, we discuss the transient dynamics of a d-wave BCS model after a quantum quench of the interaction parameter. We find that the existence of gap nodes, with the associated nodal quasiparticles, introduces a decay channel which makes the dynamics much faster than in the conventional s-wave model. For every value...

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