Conveners
AIP: Condensed Matter, Materials and Surface Physics: CMM 1
- Gunther Andersson (Flinders University)
AIP: Condensed Matter, Materials and Surface Physics: CMM 2
- Kirrily Rule (Australian Nuclear Science and Technology Organisation)
AIP: Condensed Matter, Materials and Surface Physics: CMM 3
- Sarah Harmer (Flinders University)
AIP: Condensed Matter, Materials and Surface Physics: CMM 4
- Jennifer MacLeod
AIP: Condensed Matter, Materials and Surface Physics: CMM 5
- Karina Hudson (University of New South Wales)
AIP: Condensed Matter, Materials and Surface Physics: CMM 6
- Jared Cole
AIP: Condensed Matter, Materials and Surface Physics: CMM 7
- Dongchen Qi
AIP: Condensed Matter, Materials and Surface Physics: CMM 8
- Dehong Yu
In this talk I will discuss near-surface small-angle neutron scattering (NS-SANS), performed slightly above the critical angle of reflection, as a route to overcome the shortcomings of transmission SANS for extremely small magnetic sample volumes in the thin-film limit.
I will introduce the concept of Spin gapless semiconductors (SGSs) and their unique features, highlighting the Dirac-type SGS which offers an ideal platform for massless spintronics and quantum anomalous Hall effect with a dissipationless edge state.
Our team from PUC Chile and RMIT studied how to amplify the small mixed reflection Fresnel coefficients for topological insulators via a third Mu-Metal sublayer and discovered a measurable Poynting vector deviation near its surface, key for its optical characterization.
An analytical model of the metal-organic superconductor, Cu-BHT, shows that its simplified lattice structure possesses three robust, degenerate flat bands at half-filling, which are narrower and more isolated than those of twisted-bilayer graphene.
Photoemission is the most information rich and widely used techniques for the elucidation of the electronic structure, surface states and chemistry of materials. The NanoESCA III, recently commissioned in Flinders Microscopy and Microanalysis.
In this talk I will discuss using low-temperature scanning tunnelling microscopy and spectroscopy to measure the magnetic gap in 5 SL MnBi2Te4.
Tapping mode atomic force microscopy was used to reveal nano-scale features and material variation near the surface of capture threads of glowworm (Arachnocampa tasmaniensis). Unstretched and stretched threads are contrasted.
The aim of this work is to investigate the inhibition of phosphine-protected Au9 clusters beneath a Cr(OH)3 overlayer to agglomerate under conditions of photocatalytic water splitting (i.e. UV irradiation).
I will discuss our recent work in using small molecule precursors to synthesize nanomaterials through on-surface reactions
We spatially resolve hyperfine spin properties of organic materials employed in OLEDs to reveal large intra-device variations exceeding 30% and find this property to be correlated on lengths up to 7 µm.
We demonstrate the possibility of significantly enhancing and precisely controlling the fluorescence of NV centres using plasmonic metal nanoparticles by developing the theoretical foundation for NV-plasmonic optical interaction (which is verified using existing optical measurements).
We present a highly tuneable terahertz (0.2THz) frequency selective absorber. The device is based on a graphene/gold bilayer which is patterned/etched into a cross-slot metamaterial structure. This provides high resonant quality from the gold and tuneability from the graphene.
A density functional theory investigation of cobalt-centred phthalocyanine active site tuning via atomic linker immobilisation for the CO2 electroreduction reaction. Electronic properties, geometries and free energy reaction pathways are calculated to determine the best performing systems.
While the Debye model has served as the fundamental law for bulk solid materials for over 100 years, recently new laws are discovered for liquid phase and nanoconfined solid materials.
We have the first exact solution of exciton-polaritons in magnetic fields, which agrees extremely well with experiments.
In this joint theory-experiment work, we study Bogoliubov excitations of a
polariton condensate in dynamical equilibrium with an incoherent excitonic reservoir.
We present time-resolved measurements of the ultrafast evolution of long-range spatial coherence of trapped microcavity exciton-polariton condensates spatially separated from the reservoir.
An analytic theory and micromagnetic approach have been developed for emergent inductors in spiral magnets, revealing what determines its inductance.
We predict that at appropriate tuning of bias suspended bilayer graphene undergoes quantum phase transition from band insulator to excition insulator. The corresponding critical temperature can reach up to 70K
We present our theoretical investigations on finite temperature exciton-polaritons in doped transition-metal dichalcogenides monolayers. We apply a virial expansion to the many-body Green's function, which allows for the exact calculation of the absorption spectrum and photoluminesence.
We use the finite difference method and the non-equilibrium Green's function formalism to calculate transport properties of a two-dimensional transverse magnetic focusing system with spin-orbit coupling.
The pair-angle distribution function (PADF) is a multi-atom distribution of atomic structure that can be directly measured with x-ray or electron scattering. It enables, for example, direct bond-angle distribution measurements and has wide applicability at the nanoscale.
See the attachment.
The dominant interactions between polarons in monolayer WS${}_2$ occur between polarons dressed by the same Fermi-sea of electrons. Repulsive interactions are mediated by phase space filling, while attractive interactions lead to the formation of bipolarons.
We present spatially-resolved spectroscopy of dopant-based atomic-scale devices in silicon using the resolution of low-temperature scanning tunnelling microscopy towards the fabrication and spectroscopy of artificial quantum matter in the context of dopant-based analogue quantum simulators in silicon
We theoretically show the all-electrical control of the electron’s two lowest valley states in a silicon/silicon-germanium heterostructure.
Atacamite is a frustrated quantum magnet, a class of materials which often exhibit exotic magnetic phases. The magnetic characteristics of atacamite have been investigated through various experimental and theoretical techniques. These will be discussed and compared.
In this talk we demonstrate how, using quantum point contacts (QPCs), we are able, for the first time, to carefully design devices with known electrostatic confinement dimensions, providing a pathway to scalable topological quantum hardware.
Josephson junctions are the key components of quantum computers based on superconducting qubits. We develop an atomistic model to study the effect of microscopic defects called "pinholes", which could cause energy dissipation in Al/AlO$_\textrm{x}$/Al Josephson junctions.
Metal-insulator-transition, threshold switching, negative differential resistance, Schottky-barrier, current bifurcation
A magnetic study of the van der Waals antiferromagnet CuCrP2S6 showcasing the capabilities of widefield NV microscopy and uncovering a surprising range of magnetic phases in this material.
Skyrmion nucleation induced by spin-transfer torques at an interface of a topological insulator and a ferromagnetic insulator is investigated. We find skyrmion nucleation time, critical nucleation field, and skyrmion numbers.
The material science requirements for quantum computing are significantly more stringent than for conventional semiconductor electronics. I will discuss the fundamental challenges in simulating materials for this application, both generally and specifically for superconducting devices.
See attached abstract
We derive the magnetic Raman intensity of weakly coupled Heisenberg chains using perturbation theory and the Bethe ansatz. An intensity peak that corresponds to the enhanced scattering of two triplon excitations is identified.
Color center charge state specific fluorescence has the potential to be a powerful new tool for investigate the electrical response of biological systems. In this talk I will describe development and advantages of this technique.
Using the finite-element method, we study the response of quantum dots of various geometries in electromagnetic fields. We demonstrate a general approach that supports the design and study of novel optical nanostructures.
