Phys.org October 16, 2023 Ferroelectrics possess a spontaneous polarization that is switchable by an electric field and is critical for the development of low energy nanoelectronics and neuromorphic applications. However, the realization of switchable polarization in metal oxides with simpler structures has been a major challenge. An international team of researchers (Australia, India) demonstrated the presence of robust switchable polarization at the level of a single nanocrystalline in magnesium-doped zinc oxide thin films with polar wurtzite crystal structures. Voltage control of the polarization and the coupled electronic transport behavior revealed a giant resistance change of approximately 10000% . Time- and […]
Tag Archives: Nanoelectronics
Atom-thin walls could smash size, memory barriers in next-gen devices
Science Daily February 13, 2023 In nanoelectronics charged domain walls, especially in ferroelectric structures, serve as an active element. The ability to deterministically create and manipulate charged domain walls is essential to realize their functional properties in electronic devices. An international team of researchers (China, Singapore, USA – University of Nebraska, South Dakota School of Mines and Technology) developed and demonstrated a strategy for the controllable creation and manipulation of in-plane charged domain walls in BiFeO3 ferroelectric films a few nanometres thick. By using an in-situ biasing technique within a scanning transmission electron microscope, an unconventional layer-by-layer switching mechanism was […]
At the edge of graphene-based electronics
Nanowerk December 22, 2022 An international team of researchers (USA – Georgia Institute of Technology, National High Magnetic Field Laboratory, France) has demonstrated that the annealed edges in conventionally patterned graphene epitaxially grown on a silicon carbide substrate (epigraphene) are stabilized by the substrate and support a protected edge state. The edge state has a mean free path that is greater than 50 microns, 5000 times greater than the bulk states and involves a theoretically unexpected Majorana-like zero-energy non-degenerate quasiparticle that does not produce a Hall voltage. In seamless integrated structures, the edge state formed a zero-energy one-dimensional ballistic network […]
Simpler graphene method paves way for new era of nanoelectronics
Phys.org March 15, 2022 The high electron mobility of graphene points to great potential for broadband communications and high-speed electronics operating at terahertz switching rates. However, complex, and expensive fabrication methods make it more expensive and hinder mass production of such devices. Researchers in Sweden proposed chemical vapor deposition (CVD) of graphene on commercial copper (Cu) foils providing a scalable route towards high-quality single-layer graphene. The graphene is grown on a metallic surface like Cu, Pt or Ir, after which it can be separated from the metal and transferred to specifically required substrates. The process can be simply explained as […]
Faster data transfer through plasmons
Nanowerk February 22, 2018 Surface plasmon polaritons (SPPs) function like photonic elements, carrying information at high speeds. Researchers in Singapore designed transducers comprising aluminum and gold electrodes, separated by a two nanometer-thick layer of aluminum oxide that acts as an insulating ‘quantum tunneling’ barrier. Electrons that make the quantum leap across this gap will either generate or detect SPPs. By joining two transducers with a plasmonic waveguide, so that one acted as a source and another as detector they observed about 1 in 7 of the tunneling electrons coupling to a SPP. The invention has potential applications in three-dimensional integrated […]
Researchers invented light-emitting nanoantennas based on halide perovskites
Nanowerk February 12, 2018 Using hybrid perovskite an international team of researchers (Russia, USA – UT Dallas, Australia) managed to combine a nanoantenna and a light source in a single nanoparticle. It can generate, enhance and route emission via excited resonant modes coupled with excitons. The study shows that combination of excitons with the Mie resonance in perovskite nanoparticles makes them efficient light sources at room temperature. In addition, the radiation spectrum of the nanoparticles can be changed by varying the anions in the composition of the material. The research makes the new nanoparticles a promising platform for creating compact […]