Does High Temperature Superconductivity Reside in Plane or Charge Reservoir (CR) Oxygen, in YBa2Cu3O7 (YBC)? One of the outstanding problems in contemporary solid state physics concerns the mechanism of high temperature superconductivity (HTS). In particular, what binds charges that normally repel one another, into (Cooper) pairs? Closely related to this question is where the superconductivity resides in the material. We aim to answer the latter question in the much studied prototypical HTS YBa2 ....Does High Temperature Superconductivity Reside in Plane or Charge Reservoir (CR) Oxygen, in YBa2Cu3O7 (YBC)? One of the outstanding problems in contemporary solid state physics concerns the mechanism of high temperature superconductivity (HTS). In particular, what binds charges that normally repel one another, into (Cooper) pairs? Closely related to this question is where the superconductivity resides in the material. We aim to answer the latter question in the much studied prototypical HTS YBa2Cu3O7. In doing so we expect to demonstrate that phonons, widely believed not to play a role in HTS are in fact an important component in the HTS pairing mechanism.Read moreRead less
Enhancing the performance of high voltage direct current power cables by studying space charge accumulation in their synthetic polymeric insulation. Synthetic polymeric insulation has proved very successful in high voltage alternating current power transmission cables, and cable manufacturers have therefore sought to use it in high voltage direct current (HVDC) cables, for which there is a rapidly growing demand. Yet the accumulation of space charge in such cables presently severely limits the m ....Enhancing the performance of high voltage direct current power cables by studying space charge accumulation in their synthetic polymeric insulation. Synthetic polymeric insulation has proved very successful in high voltage alternating current power transmission cables, and cable manufacturers have therefore sought to use it in high voltage direct current (HVDC) cables, for which there is a rapidly growing demand. Yet the accumulation of space charge in such cables presently severely limits the maximum operating voltage and transmitted power. Nearly all this space charge is due to the temperature gradient in the insulation. We will analyze space charge profiles in polyethylene and other synthetic polymers, and derive basic scientific data which will inform the design of HVDC cables with greatly enhanced performance.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0882878
Funder
Australian Research Council
Funding Amount
$350,000.00
Summary
Facility for imaging, manipulation and measurement of molecular-scale quantum materials. The development of functional electronic devices relies on understanding how properties on the atomic-scale influence the performance of new device materials. We will develop the capability to image and manipulate surfaces, and enable new protocols for probing the quantum properties of a wide range of materials that cannot currently be accessed at the molecular-level. By facilitating studies of important eme ....Facility for imaging, manipulation and measurement of molecular-scale quantum materials. The development of functional electronic devices relies on understanding how properties on the atomic-scale influence the performance of new device materials. We will develop the capability to image and manipulate surfaces, and enable new protocols for probing the quantum properties of a wide range of materials that cannot currently be accessed at the molecular-level. By facilitating studies of important emerging materials such as diamond, fullerenes and magnetic molecules, the facility aims to place Australia at the forefront of new areas of surface and device science, and to develop new devices for quantum metrology, information and molecular detection within frontier quantum industries.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0775545
Funder
Australian Research Council
Funding Amount
$445,000.00
Summary
Infrastructure for Surface and Molecular-level Electronic and Spintronic Materials Measurement. It is recognised that molecular-state materials will play an important role in the development of new approaches to metrology, information processing and sensitive detection. Building on our existing expertise and infrastructure for nanoscale fabrication and surface analysis, we will develop a measurement capability for the study of atomic-scale and molecular-state materials, such as doped fullerenes, ....Infrastructure for Surface and Molecular-level Electronic and Spintronic Materials Measurement. It is recognised that molecular-state materials will play an important role in the development of new approaches to metrology, information processing and sensitive detection. Building on our existing expertise and infrastructure for nanoscale fabrication and surface analysis, we will develop a measurement capability for the study of atomic-scale and molecular-state materials, such as doped fullerenes, bio-materials, magnetic molecules, single implanted atoms and isolated optical centres, which show great promise for breakthrough fundamental science and the application of quantum phenomena to frontier nanoelectronics industries.Read moreRead less
Quantum transport in carbon-based materials. Carbon-based molecular materials will play an important role to frontier nanoelectronics industries. Building on our existing expertise and infrastructure for nanoscience, and employing new facilities at the Australian synchrotron, we aim to develop a unique approach to molecular-scale quantum device engineering utilising pure-carbon materials. New protocols for materials control of electronic structure at the molecular level will be developed to demo ....Quantum transport in carbon-based materials. Carbon-based molecular materials will play an important role to frontier nanoelectronics industries. Building on our existing expertise and infrastructure for nanoscience, and employing new facilities at the Australian synchrotron, we aim to develop a unique approach to molecular-scale quantum device engineering utilising pure-carbon materials. New protocols for materials control of electronic structure at the molecular level will be developed to demonstrate carbon as a quantum material, a high profile objective that will place Australia at the forefront of a new area of surface and device science. Read moreRead less
Photoemission studies of Fermi surfaces, of wide bandgap semi-conductors and quasi crystals. Knowledge of the detailed shape of the Fermi surface of a conducting material is vital for an understanding of its electrical and magnetic properties. We will use angle resolved photo-emission in conjunction with synchrotron radiation to explore the Fermi surfaces of technologically important magnetic alloys, the mechanism driving the occurance of charge density waaves in layer compounds and the electron ....Photoemission studies of Fermi surfaces, of wide bandgap semi-conductors and quasi crystals. Knowledge of the detailed shape of the Fermi surface of a conducting material is vital for an understanding of its electrical and magnetic properties. We will use angle resolved photo-emission in conjunction with synchrotron radiation to explore the Fermi surfaces of technologically important magnetic alloys, the mechanism driving the occurance of charge density waaves in layer compounds and the electronic properties of wide band-gap semi-conductors such as GaN, SiC and of selected quasi crystals. These measurements will be performed using a unique high resolution toroidal spectrometer currently under construction at La Trobe university.Read moreRead less
Search for spin liquids and novel physics of strongly correlated electrons. This project aims to identify new physics in quantum magnets and emergent phenomena in solids where the electrons are strongly coupled and intertwined in a complex manner. As a consequence, quantum effects are dramatically enhanced and, in certain situations, force the electrons to split into different exotic particles. Expected outcomes of this project include identification of suitable physical systems, candidate mater ....Search for spin liquids and novel physics of strongly correlated electrons. This project aims to identify new physics in quantum magnets and emergent phenomena in solids where the electrons are strongly coupled and intertwined in a complex manner. As a consequence, quantum effects are dramatically enhanced and, in certain situations, force the electrons to split into different exotic particles. Expected outcomes of this project include identification of suitable physical systems, candidate materials and appropriate conditions required for the experimental observation of this phenomena with neutron scattering methods. Such particles host an unexplored potential for future electronic devices and might be key for next generation technologies. The advanced materials and exotic particles identified in this project will inform the development of next generation technologies, becoming the quantum bits in future quantum computers.Read moreRead less
Cooperativity in Spin Crossover Systems: Memory, Magnetism and Microporosity. Spin-crossover centres are a well known form of inorganic electronic switch for which variation of temperature, pressure and irradiation leads to a change in d-electron configuration and therefore changes to structure, colour and magnetism. Here we aim to synthesise and study a wide variety of new spin-crossover systems where cooperativitiy between centres, induced by careful supramolecular design, will lead to molecul ....Cooperativity in Spin Crossover Systems: Memory, Magnetism and Microporosity. Spin-crossover centres are a well known form of inorganic electronic switch for which variation of temperature, pressure and irradiation leads to a change in d-electron configuration and therefore changes to structure, colour and magnetism. Here we aim to synthesise and study a wide variety of new spin-crossover systems where cooperativitiy between centres, induced by careful supramolecular design, will lead to molecules and materials having memory retention, magnetic ordering and/or microporosity. The significance of these aims covers several fundamental questions in the science of electronic systems. We also identify a number of potential nanochemical switching applications for the unique systems proposed.Read moreRead less
Cooperativity in Spin-Crossover Systems: Memory, Magnetism and Microporosity. Spin-crossover centres are a well known form of inorganic electronic switch for which variation of temperature, pressure and irradiation leads to a change in d-electron configuration and therefore changes to structure, colour and magnetism. Here we aim to synthesise and study a wide variety of new spin-crossover systems where cooperativity between centres, induced by careful supramolecular design, will lead to molecule ....Cooperativity in Spin-Crossover Systems: Memory, Magnetism and Microporosity. Spin-crossover centres are a well known form of inorganic electronic switch for which variation of temperature, pressure and irradiation leads to a change in d-electron configuration and therefore changes to structure, colour and magnetism. Here we aim to synthesise and study a wide variety of new spin-crossover systems where cooperativity between centres, induced by careful supramolecular design, will lead to molecules and materials having memory retention, magnetic ordering and/or microporosity. The significance of these aims covers several fundamental questions in the science of electronic systems. We also identify a number of potential nanochemical switching applications for the unique systems proposed.Read moreRead less
Quantitative real-time imaging of high-temperature superconductors. This project will develop a robust technique for the quantitative real-time imaging of high-temperature superconductors. The image-analysis algorithm so obtained will be a virtual software lens, which is able to decode the information contained in data obtained by a well-established but hitherto qualitative imaging technique. We will transform this technique into one uniquely capable of obtaining two-dimensional movies of the ....Quantitative real-time imaging of high-temperature superconductors. This project will develop a robust technique for the quantitative real-time imaging of high-temperature superconductors. The image-analysis algorithm so obtained will be a virtual software lens, which is able to decode the information contained in data obtained by a well-established but hitherto qualitative imaging technique. We will transform this technique into one uniquely capable of obtaining two-dimensional movies of the current distributions, magnetic fields, and pinning defects in superconducting films. Such a quantitative characterization of these key superconductor parameters will be an important tool in the present global quest for room-temperature superconductivity.Read moreRead less