Below you'll find a list of all posts that have been categorized as “Annual Workshop”
Finding tunable van der Waals (vdW) ferromagnets that operate at above room temperature is an important research focus in physics and materials science. Most vdW magnets are only intrinsically magnetic far below room temperature and magnetism with square-shaped hysteresis at room temperature has yet to be observed. Here, we report magnetism in a quasi-2D magnet Cr1.2Te2 observed at room temperature …
The electronic properties of materials are determined by the atomic constituents and their crystal lattice structure. Engineered electronic materials, which are created by applying a designed spatially periodic potential, a superlattice, have offered a powerful way to alter the properties of natural crystals in a controlled manner. Imposing spatially periodic electric field via nanolithography has also been proven to be …
The QAH state can only be observed bellow 1 K, although the magnetic ordering can go beyond 100 K. Electron phonon interactions (EPI) come into play a role on the QAH state due to the raise of temperature. Here we show, based on the density functional perturbation theory (DFPT), that EPI in MBT strongly correlate with the magnetic ordering, septuple …
Co2MnGa, a Weyl ferromagnet characterized by its cubic-based high structural symmetry, has garnered significant attention owing to its promising capabilities in electronic and spintronic applications. The specific structural attributes of this compound play a pivotal role in shaping its electronic transport properties, often leading to unconventional phenomena that diverge from conventional expectations. In this study, we employ a combination of …
The kagome magnet TbMn6Sn6 exhibits a near-perfect structure for exploring topological Chern physics, which features a Mn kagome plane and a nearby perpendicular magnetic anisotropic Tb layer below 310 K (the spontaneous spin reorientation transition “point”, T SR ). Scanning tunnelling microscopy/spectroscopy has confirmed the presence of Chern gap and chiral boundary states within TbMn6Sn6. Additionally, the Berry curvature, generated …
Viscous effects in electronic systems typically arise from vorticity at the boundaries of the 2D system. This limits the contribution of the viscous dissipation to the total dissipation of the system, making the viscous effect challenging to measure. In our work, we use a periodic array of micromagnets to create vorticity – and thus viscous dissipation – across the entire …
About the presenter Dr Sascha Hoinka is an ARC DECRA Fellow in Prof Chris Vale’s group at Swinburne University of Technology, where he experimentally studies one-dimensional quantum wires of Fermi atoms. Within FLEET, Dr Hoinka has taken a lead role in designing and constructing Australia’s first quantum-gas microscope – a multi-institution facility hosted at Swinburne. Intended to be accessible by …
About the presenter Simon joins FLEET as a partner investigator from the MacDiarmid Institute for Advanced Materials and Nanotechnology, where he leads the Institute’s Future Computing project to control electron transport and spin through superconductivity and topology. As a Senior Scientist at the Robinson Research Institute (Victoria University of Wellington), Simon applies his expertise in magnetic thin films and structures …
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 …
The presence of a controllable and switchable spontaneous dipole enables ferroelectrics to be exploited for data storage as well as capacitance applications. The ferroelectric domain structures and corresponding properties are strongly dependent on the selection of materials and heterostructure configurations. Resonant tunnelling is a quantum-mechanical effect in which electron transport is controlled by the discrete energy levels within a quantum-well …
Transition metal dichalcogenides (TMDs) are atomically thin materials that, when stacked together, create a moiré lattice where the existence of flat bands has been predicted and observed. Hence, a plethora of phenomena related to electronic correlations such as superconductivity, topological non-trivial effects or Mott insulating phases can be observed in these synthetic materials. In this research, we fabricate the materials …
In ferroics, emergent phenomena arise from complex interactions among various degrees of freedom that can be used as tuning knobs for physical responses. In particular, strain-polarization coupling in ferroelectrics enables the formation of exotic polarization textures, such as topologically protected states. Notably, due to high local crystalline anisotropy, such topological textures are limited to a few nanometres and are highly …
Kyle Boschen completed his Honours project in 2022 and is now undertaking a PhD in CI Jeff Davis‘ group. He is investigating the properties of two dimensional semiconducting TMDs using ultrafast spectroscopy. The project fits the FLEET Enabling Research Theme 2, Exciton Superfluids
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 …
La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3 is a high entropy perovskite oxide which has attracted interest due to the ability to switch between antiferromagnetic and ferromagnetic ground states by varying its Mn concentration. We have grown thin films of this material, and using X-ray, electron, and neutron diffraction, examined how it changes under different epitaxial strain conditions About the presenter Kayla Lord is a PhD …
Recent experiments have demonstrated that holes in a two-dimensional hole gas (2DHG) can be focused using a transverse magnetic field to create a viable spin filter [1]. While transverse magnetic focusing (TMF) has been studied extensively in two-dimensional electron gases, theoretical studies on TMF in 2DHGs is sparse as of this writing. We demonstrate that numerical modelling allows us to …
About the presenter Zhao is a Research Fellow in CI Nikhil Medhekar‘s group. After completing his PhD in 2018, Zhao is exploring magnetic materials and topological materials theoretically. He aims to understand the integration of magnetism and topology in 2D materials. This work fits the FLEET Research Theme 1, Topological Materials.
Quantum gases with internal degrees of freedom give access to novel quantum vortex phases due to the interplay of mass and spin density-density interactions. Spin-1 Bose-Einstein condensates facilitate unusual vortex phenomenology as they are able to host different ground state phases which can in turn support vortex configurations which support higher and even fractional winding numbers, such as polar core …
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.
With the increasing demand of new age electronics, there has been a constant attempt to incorporate the electronics with nanotechnology. This brings a dire need to include ferroelectrics in the electronics because of their intriguing functionalities. Upon reducing the dimension of ferroelectrics in nanoscale regime, owing to complex interaction between charge, strain, and chemical composition degrees of freedom, one can observe …
Recent evidence suggests monolayer WTe2 could be an excitonic insulator. If so, carrier doping and interaction with the substrate should heavily affect the bandgap. The Bose-Einstein condensate of excitons are predicted to exhibit charge order with a characteristic momentum. When grown on an insulator as opposed to a conductor, we have observed the formation of a significantly larger (∼ 200 …
On surface synthesis of metal organic frameworks has been a hot topic during the past decade. Nevertheless, just recently the electronic and magnetic properties of these materials have started to attract the attention of the researchers due to their potential applications in quantum sensing and quantum information storage. In this poster, magnetic and electronic properties of lanthanide MOFs will be …
