Events in Physics
Thursday, December 01, 2016
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PS1.28
Controlling the structural and electronic properties of solids with THz lasers has opened up tantalizing prospect in ultrafast materials science. In contrast to optical frequencies it enables mode-selective driving of vibrational excitations relevant for the establishment of various broken-symmetry states. In particular so-called light-induced superconductivity has been observed in several materials ranging from cuprates to alkali-doped fullerenes. Motivated by experiments on driven infrared active molecular vibrations in organic materials, I will discuss the effect of a finite frequency ω modulation of on-site energies in the Hubbard model with a checkerboard spatial periodicity. In particular we focus on the strong-coupling limit U >> t of the doped Hubbard model where the effective t-J Hamiltonian is applicable and super-exchange pairing can occur. Through a Floquet analysis, in the physically relevant regime where U >> ω and ω >> t, J, we show that this driving causes a substantial suppression of the electronic hopping t, while leaving the bare super-exchange interaction J unchanged. This suggests that electrons can be slowed down enough in the out-of-equilibrium state to allow the normally subordinate super-exchange interaction to become dominant, and thus favour nearest-neighbour pairing. I will show that this leads to a compelling new pathway to engineering light-induced superconductivity in strongly correlated quantum materials. |
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STFC External Innovations runs a Challenge Led Applied Systems Programme (CLASP) to support the application and commercialisation of STFC research in the key global research challenge areas of energy, environment, healthcare and security. Individual annual calls are aligned to specific challenge areas. STFC is now offering £1.5M to fund a range of projects from short feasibility studies to large developmental projects that will use STFC funded research to solve key challenges in the Security sector. There is a two stage application process for CLASP. Applicants are invited to submit a short outline, which is assessed by the CLASP panel. Short listed applicants are then invited to develop a full proposal with the assistance of CLASP panel members assigned as mentors. |
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EOIThe RCUK Digital Economy (DE) Theme is running a competition designed to help capture and promote the impact that your digital economy research is having. Three prizes of £10,000 are available to support researchers to further tell the story of research impact in an interesting and engaging way to a wider audience. New for this year, the TTE (Telling Tales of Engagement) 2016 competition has two aims. We want you to:
To apply, please complete the online form addressing the questions in the Call Scope by 12:00 noon on Thursday 01 December 2016. |
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A Detailed Application is only accessible to applicants once they have received an invitation to progress from the Outline stage. |