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topological insulators News
Materials-Based Solution Accelerates Photonic Computing
ORLANDO, Fla., May 31, 2022 — Researchers at the University of Central Florida (UCF) have introduced a previously undescribed class of topological insulators. The researchers increased the speed and efficiency of light as it flows through photonic circuits, in a demonstration...
Photonic Chip Combines Many VCSELs into Single Laser
WÜRZBURG, Germany, Sept. 30, 2021 — Researchers from the Technion-Israel Institute of Technology and the University of Würzburg successfully forced an array of vertical-cavity lasers to act together as a single laser — a highly effective laser network the size of a grain of...
Terahertz Field Stabilizes Surface State of Topological Materials
AMES, Iowa, March 4, 2020 — Some topological materials are insulators in their bulk form but possess electron-conducting behavior on their surfaces. The contrast in the behavior of these surface electrons is promising for future applications but challenging to control....
Higher-Order Topological States Could Lead to Faster Data Transfer
NEW YORK, Dec. 13, 2019 — Research into topological photonic metamaterials, led by City College of New York, shows that long-range interactions in metamaterials can change the behavior of lightwaves, forcing the waves to localize in space. The study further shows that by...
Kane, Mele Win Frontiers of Knowledge Award
BILBAO, Spain, March 8, 2019 — Physicists Charles Kane and Eugene Mele are the recipients of the 2019 Frontiers of Knowledge Award, for discovering topological insulators, described as a new class of materials with extraordinary electronic properties.
Researchers Use Photovoltage Measurements to Observe Quantum Spin Effects
SINGAPORE, Aug. 15, 2018 — Scientists have observed specific spin phenomena in topological insulators and metals using a scanning photovoltage microscope. The new, practical way to examine quantum behavior of materials could yield information useful for building future...
Novel Material Demonstrates Quantum Properties
ORLANDO, Fla., Aug. 6, 2018 — Researchers have discovered a novel material with multiple quantum properties: Hf2Te2P, a material that is chemically composed of hafnium, tellurium, and phosphorus. The team is using angle-resolved photoemission spectroscopy (ARPES) and...
Optically Imaging the Fourth Dimension
ZÜRICH, Jan. 8, 2017 — A visual representation of the fourth dimension has been observed in two independent experiments. The theoretical groundwork for these experiments was laid by researchers at ETH Zürich. In both experiments the quantum Hall effect was applied to...
Researchers Generate a Directional, Spin-Polarized Photocurrent Using Topological Insulator
MINNEAPOLIS/ST. PAUL, Minn., Dec. 21, 2017 — Researchers have developed a device for controlling the direction of photocurrent without using an electric voltage. This device, according to researchers, could provide a way of implementing coupled spin-orbit interaction between electrons and...
Lasers Control Electronic Spin
CAMBRIDGE, Mass., Dec. 6, 2011 — For the first time, light has proved useful in obtaining information about the spin of electrons flowing over topological insulators — a discovery that could open up possibilities for new devices based on spintronics and magnetic data storage....
Laser Induces Conduction in Graphene
COLLEGE PARK, Md., June 20, 2011 — By illuminating graphene with a mid-infrared laser, researchers now can open an observable bandgap in the otherwise gapless material, enabling it to become a semiconductor. Graphene is the thinnest and strongest material ever discovered. It is...
A Quantum Synchronized Spin
ARLINGTON, Va., Feb. 17, 2009 – An international team of scientists led by a Princeton University group recently discovered that, on the surface of certain materials, collective arrangements of electrons move in ways that mimic the presence of a magnetic field where none is...
(12 results found)
May 2024
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