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Strong interactions between charges and light-matter coupled quasiparticles offer an intriguing prospect with applications from optoelectronics to light-induced superconductivity. Here, we investigate how the interactions between electrons and exciton-polaritons in a two-dimensional semiconductor microcavity can be resonantly enhanced due to a strong coupling to a trion, i.e., an electron-exciton bound state. We develop a microscopic theory that uses a strongly …

Magnetic proximity between topological insulators and magnetic insulators is expected to yield interesting states such as the quantum anomalous Hall insulator or axion insulator. In this work, we demonstrate progress towards the creation and characterisation of such structures through transferred MBE TI growths onto MIs, or direct growths on MIs. About the presenter Matthew Gebert is a PhD student in …

A superfluid transistor requires flow through a potentially disordered channel. This poster will provide an overview of research at UQ on the nonequilibrium flow of superfluids through two-dimensional channels. About the presenter CI Prof Matthew Davis makes use of the methods of reservoirs and open quantum systems to drive transitions between novel nonequilibrium states of matter, and his work focuses …

About the presenter Matthew Berkman is an Honours student working with CI Jeff Davis at Swinburne. His project is focusing on measuring polariton interactions with multidimensional coherent spectroscopy. Specifically, he’s quantifying the complex valued interaction strength between polaritons (in GaAs system) as a function of exciton fraction and for same and opposite spin polaritons

About the presenter Mateusz is a Research Fellow in CI Elena Ostrovskaya‘s group. He received his PhD at the University of Warsaw in Poland where he worked on microcavities filled with liquid crystals. His work fits the FLEET Research Theme 2, Exciton Superfluids.

The electron skew scattering by impurities is one of the major mechanisms causing the anomalous Hall effects in semiconductor nanostructures. In this Letter, we argue that in plasmonic setups the skew scattering of plasma waves can be engineered to be giant and observed directly via near-field probes. In particular, we consider the scattering of plasma waves in gated two-dimensional electron …

Overview of recent exciting results on room temperature condensation of exciton-polaritons and Optical Pump Terahertz Probe (OPTP) results in graphene. About the presenter Gary Beane is a Research Fellow working with A/Prof Agustin Schiffrin at Monash University, where he is investigating optically driven topological phases of matter using terahertz time domain spectroscopy and ultrafast pump-probe spectroscopy. He is mainly involved …

A long standing puzzle has been resolved… About the presenter CI Prof Oleg Sushkov leads two theoretical investigations within Research Theme 1: (i) Artificial nanofabricated materials including artificial topological insulators. (ii) Laterally modulated oxide interfaces. Within Research Theme 3 Sushkov also participates in studies of theoretical many-body physics aspects of exciton condensates and cold atoms aimed at support of the …

Liquid metal alloys are an ever growing industry with a myriad of potential applications such as catalysis, and electronics.1 Unfortunately, the full potential of these materials are under-utilised and is outside the scope of other research parameters.2 Herein, nanodroplet alloyed materials are probed and investigated with the use of a Transmission Electron Microscope (TEM), thus unlocking the potential these materials …

The surfaces of liquid metals can serve as a platform to synthesise two-dimensional materials. By exploiting the self-limiting Cabrera-Mott oxidation reaction that takes place at the surface of liquid metals exposed to ambient air, an ultrathin oxide layer can be synthesised and isolated. Several synthesis approaches based on this phenomenon have been developed in recent years, resulting in a diverse …

I will present on recent results in our group on 1) room temperature condensation of exciton-polaritons in perovskite-DBR microcavities and 2) Broadband optical-pump THz probe (OPTP) results with graphene. About the presenter Gary Beane is a Research Fellow working with A/Prof Agustin Schiffrin at Monash University, where he is investigating optically driven topological phases of matter using terahertz time domain …

About the presenter Brendan is working with CI Meera Parish to investigate the dynamics of excitons in two-dimensional semiconductors, with a particular focus on spectroscopic probes and the effect of electron doping or large carrier densities. to characterise the topology of an exciton-polariton system and to show how to calculate and measure its quantum geometric tensor (including complex Berry curvature). …

About the presenter Mitko Oldfield is an experimental physicist specialising in terahertz time-domain spectroscopy and exciton-polariton condensation, working with A/Prof Agustin Schiffrin and Dr Gary Beane at Monash University within FLEET’s research theme 2 and research theme 3. Mikto’s research focuses on forming a polariton condensate in high Q-factor microcavities through the use of a terahertz pumping beam generated via …

The quantum kicked rotor (QKR) is a system used to explore quantum chaos, which is extensively studied theoretically and experimentally. The QKR also has many flavours such as the single kicked rotor revealing localisation, delocalisation and anti-resonant behaviours. Moreover, it has the ability to expand to higher dimensions by the modulation of the kick strength with incommensurate frequencies resulting in …

Quasiparticles with Weyl dispersion can display an abundance of novel topological, thermodynamic and transport phenomena, which is why novel Weyl materials and platforms for Weyl physics are being intensively looked for in electronic, magnetic, photonic and acoustic systems. We demonstrate that conducting materials in magnetic fields generically host Weyl excitations due to the hybridization of phonons with helicons, collective neutral …

Monolayer tungsten diselenide (1L-WSe2) has recently received attention because of its favourable band structure for probing novel correlated phenomena of p-type carriers, such as interaction-driven and topological insulating phases and superconductivity in twisted bilayers, and Bose-Einstein condensation of excitons in double-layer heterostructures. However, electrical transport studies have been impeded by the lack of a reliable method to realize Ohmic hole-conducting …

As the Earth rotates, the Coriolis force causes several oceanic and atmospheric waves to be trapped along the equator, including Kelvin, Yanai, Rossby, and Poincaré modes. It has been demonstrated that the mathematical origin of these waves is related to the nontrivial topology of the underlying hydrodynamic equations. Inspired by recent observations of Bose-Einstein condensation (BEC) in bubble-shaped traps in …