Lan Wang | |
---|---|
Nationality | Australian |
Alma mater | Zhejiang University National University of Singapore University of Minnesota |
Scientific career | |
Fields | Material Science |
Institutions | RMIT University |
Professor Lan Wang is a Chinese-Australian material scientist known for expertise in materials synthesis and advanced materials characterisation.
He was appointed as an associate professor of physics at RMIT University in Melbourne, Australia in 2014. [1]
Wang has a Bachelor of Science in Physics (1993) and Master of Science in theoretical physics (1997) from Zhejiang University, China, a PhD in Physics from the National University of Singapore, Singapore (2001) and a PhD in Materials Sciences from the University of Minnesota, USA (2006).
He has held professional positions at XinDa Communication Solution Inc, China; Rush Presbyterian St Luke’s Medical Center, Chicago, USA; University of Minnesota, USA; and Nanyang Technological University, Singapore. [1]
From 2014 he has been Associate Professor, School of Applied Science, RMIT University.
Wang is a Theme Leader and node leader at ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) [2] where he leads the Centre's nano-device fabrication research theme, as well as studying high-temperature quantum anomalous Hall systems in topological materials.
Past and current collaborations include the National University of Singapore (NUS), Hong Kong University (HKU), University of Southampton, and the China High Magnetic Field Lab at Chinese Academy of Science.
Wang's research has focused on topological condensed matter systems, spintronics, and magnetic materials. His team at RMIT grows single crystals, thin films and nanostructures, fabricating devices for electron and spin transport measurements for new generation spintronic devices.
For material growth and characterization, Wang is experienced with ultra high vacuum (UHV) systems and thin-film deposition, single-crystal growth, and nanostructure growth. For device fabrication he is experienced in E-beam and photo lithography. For characterising electric and magnetic properties of materials, he is experienced in standard magnetic measurements, measurements and analysis of the quantum oscillations of single crystalline systems in high magnetic field and low temperature, point-contact spectroscopy, gate-tuned electric transport in nano-devices, and measurements of magneto-electrical coupling effect.
Wang has published over 100 papers with total citations over 2500, and an H-index of 26 [3]
Ferromagnetism is a property of certain materials that results in a significant, observable magnetic permeability, and in many cases, a significant magnetic coercivity, allowing the material to form a permanent magnet. Ferromagnetic materials are familiar metals that are noticeably attracted to a magnet, a consequence of their substantial magnetic permeability. Magnetic permeability describes the induced magnetization of a material due to the presence of an external magnetic field. This temporarily induced magnetization, for example, inside a steel plate, accounts for its attraction to the permanent magnet. Whether or not that steel plate acquires a permanent magnetization itself depends not only on the strength of the applied field but on the so-called coercivity of the ferromagnetic material, which can vary greatly.
Spintronics, also known as spin electronics, is the study of the intrinsic spin of the electron and its associated magnetic moment, in addition to its fundamental electronic charge, in solid-state devices. The field of spintronics concerns spin-charge coupling in metallic systems; the analogous effects in insulators fall into the field of multiferroics.
Coercivity, also called the magnetic coercivity, coercive field or coercive force, is a measure of the ability of a ferromagnetic material to withstand an external magnetic field without becoming demagnetized. Coercivity is usually measured in oersted or ampere/meter units and is denoted HC.
Tunnel magnetoresistance (TMR) is a magnetoresistive effect that occurs in a magnetic tunnel junction (MTJ), which is a component consisting of two ferromagnets separated by a thin insulator. If the insulating layer is thin enough, electrons can tunnel from one ferromagnet into the other. Since this process is forbidden in classical physics, the tunnel magnetoresistance is a strictly quantum mechanical phenomenon.
Giant magnetoresistance (GMR) is a quantum mechanical magnetoresistance effect observed in multilayers composed of alternating ferromagnetic and non-magnetic conductive layers. The 2007 Nobel Prize in Physics was awarded to Albert Fert and Peter Grünberg for the discovery of GMR.
Magnetic semiconductors are semiconductor materials that exhibit both ferromagnetism and useful semiconductor properties. If implemented in devices, these materials could provide a new type of control of conduction. Whereas traditional electronics are based on control of charge carriers, practical magnetic semiconductors would also allow control of quantum spin state. This would theoretically provide near-total spin polarization, which is an important property for spintronics applications, e.g. spin transistors.
Albert Fert is a French physicist and one of the discoverers of giant magnetoresistance which brought about a breakthrough in gigabyte hard disks. Currently, he is an emeritus professor at Paris-Saclay University in Orsay, scientific director of a joint laboratory between the Centre national de la recherche scientifique and Thales Group, and adjunct professor at Michigan State University. He was awarded the 2007 Nobel Prize in Physics together with Peter Grünberg.
Exchange bias or exchange anisotropy occurs in bilayers of magnetic materials where the hard magnetization behavior of an antiferromagnetic thin film causes a shift in the soft magnetization curve of a ferromagnetic film. The exchange bias phenomenon is of tremendous utility in magnetic recording, where it is used to pin the state of the readback heads of hard disk drives at exactly their point of maximum sensitivity; hence the term "bias."
Spin pumping is a method of generating a spin current, the spintronic analog of a battery in conventional electronics.
Spinmechatronics is neologism referring to an emerging field of research concerned with the exploitation of spin-dependent phenomena and established spintronic methodologies and technologies in conjunction with electro-mechanical, magno-mechanical, acousto-mechanical and opto-mechanical systems. Most especially, spinmechatronics concerns the integration of micro- and nano- mechatronic systems with spin physics and spintronics.
A topological insulator is a material whose interior behaves as an electrical insulator while its surface behaves as an electrical conductor, meaning that electrons can only move along the surface of the material.
Spin engineering describes the control and manipulation of quantum spin systems to develop devices and materials. This includes the use of the spin degrees of freedom as a probe for spin based phenomena. Because of the basic importance of quantum spin for physical and chemical processes, spin engineering is relevant for a wide range of scientific and technological applications. Current examples range from Bose–Einstein condensation to spin-based data storage and reading in state-of-the-art hard disk drives, as well as from powerful analytical tools like nuclear magnetic resonance spectroscopy and electron paramagnetic resonance spectroscopy to the development of magnetic molecules as qubits and magnetic nanoparticles. In addition, spin engineering exploits the functionality of spin to design materials with novel properties as well as to provide a better understanding and advanced applications of conventional material systems. Many chemical reactions are devised to create bulk materials or single molecules with well defined spin properties, such as a single-molecule magnet. The aim of this article is to provide an outline of fields of research and development where the focus is on the properties and applications of quantum spin.
The ARC Centre of Excellence in Future Low-Energy Electronics Technologies is a collaboration of physicists, electrical engineers, chemists and material scientists from seven Australian universities developing ultra-low energy electronics aimed at reducing energy use in information technology (IT). The Centre was funded in the 2017 ARC funding round.
Spin Hall magnetoresistance (SMR) is a transport phenomenon that is found in some electrical conductors that have at least one surface in direct contact with another magnetic material due to changes in the spin current that are present in metals and semiconductors with a large spin Hall angle. It is most easily detected when the magnetic material is an insulator which eliminates other magnetically sensitive transport effects arising from conduction in the magnetic material.
Spinterface is a term coined to indicate an interface between a ferromagnet and an organic semiconductor. This is a widely investigated topic in molecular spintronics, since the role of interfaces plays a huge part in the functioning of a device. In particular, spinterfaces are widely studied in the scientific community because of their hybrid organic/inorganic composition. In fact, the hybridization between the metal and the organic material can be controlled by acting on the molecules, which are more responsive to electrical and optical stimuli than metals. This gives rise to the possibility of efficiently tuning the magnetic properties of the interface at the atomic scale.
Xiaolin Wang is a Chinese-Australian scientist recognised for his work in advanced materials synthesis and characterisation and spintronics. He is director of the Institute for Superconducting and Electronic Materials, University of Wollongong. Wang is a University of Wollongong senior professor, and an Australian Research Council future fellow.
Liesl Folks is an Australian-American engineer who is Professor and Senior Vice President for Academic Affairs at the University of Arizona. She has conducted research on magnetic materials and spintronic devices.
Anatolie S. Sidorenko is a doctor of physical and mathematical sciences and professor at the Technical University of Moldova. He specializes in condensed matter physics with the focus on electronic transport and magnetic properties of low dimensional systems – thin films and layered superconductors, design of superconducting devices and sensors. He made key contributions to investigation of novel superconducting materials and hybrid structures superconductor-ferromagnet, multiband and triplet superconductivity.
In magnetic systems, excitations can be found that are characterized by the orientation of the local magnetic moments of atomic cores. A magnetic skyrmionium is a ring-shaped topological spin texture and is closely related to the magnetic skyrmion.
Jacek K. Furdyna is a Polish American physicist and academic. He is a Professor Emeritus at the University of Notre Dame.