Department Calendar

July 2018

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CM / AMO Seminar: Maria Maragkou, Nature Materials

CM / AMO Seminar: Maria Maragkou, Nature Materials

Date: 
Tue, 07/10/2018 - 12:00pm
Location: 
705 Pupin Hall

Special day & time:  Tuesday, July 10, 2018, 12:00 PM*

"Inside Nature Materials"

Maria Maragkou, Nature Materials

Since its launch in 2002, Nature Materials remains a leading journal in the field of materials science across many disciplines, aiming at publishing cutting edge science for the relevant scientific communities as well as disseminating exciting results among the wider readership of materials scientists. This talk will describe how these principles shape the editorial process in Nature Materials and other journals within the Nature family, amidst a rapidly changing scientific publishing landscape, underlining the key points from submission of original research papers to publication.

About the speaker

Maria joined Nature Materials in January 2015, after briefly working in Nature Photonics. She has a first degree in electrical and computer engineering from the University of Patras, Greece, and a PhD in physics from the University of Southampton, UK on the topic of light-matter interactions in semiconductor microcavities. She then worked as a postdoctoral researcher at the Universidad Autónoma de Madrid, Spain and at the École Normale Superiéure in Paris, studying quantum optics with epitaxial quantum dots.

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07/10/2018 - 12:00pm
 
 
 
CM / AMO Seminar: Giacomo Mazza, Ecole Polytechnique

CM / AMO Seminar: Giacomo Mazza, Ecole Polytechnique

Date: 
Fri, 07/13/2018 - 1:15pm
Location: 
705 Pupin Hall

*Special Condensed Matter Physics Seminar:  Friday, July 13, 2018, 1:15 - 2:15 PM*

Strong light-matter coupling and collective phenomena in quantum materials

Giacomo Mazza, Ecole Polytechnique

Collective phenomena originating from interactions between light and matter have become a major focus of interest spanning different fields of research.  By allowing the creation of entangled quantum states of light and collective matter excitations, cavity quantum electrodynamics offers a fascinating platform in this context.

In this talk I will discuss how a cooperative effect between long-range correlations induced by the light-matter interaction and strong electron interactions intrinsic to quantum materials can lead to the stabilisation of coherent phases of light and matter.

By studying a simple model of interacting electrons coupled to a single mode cavity field I will show that a phase characterised by the simultaneous condensation of excitons and photon superradiance, the “superradiant excitonic insulator" (SXI) can be realised. Superradiance cannot be reached in the absence of electronic interactions. At the same time coupling with the cavity field promotes excitonic condensation in regimes of temperature and interaction where it cannot be stabilised in the absence of light-matter coupling. Therefore, the SXI intertwines excitonic condensation and superradiance in conditions where the two phases cannot be individually stabilised in the absence of such cooperative effect.

I will discuss probes to detect the SXI phase as photon spectra and optical conductivity of the hybrid light-matter system.

G. Mazza and A. Georges arXiv 1804.08534

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07/13/2018 - 1:15pm
 
 
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