Recent manipulations of excitons in moiré superlattices
Light can excite electron and hole pairs inside semiconducting materials. If the attraction between a negatively charged electron and a positively charged hole (the antiparticle of electron in solid state physics) is strong, they stay bound together,.....»»
Scientists uncover exciton behavior in van der Waals magnets
A research group led by scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory has uncovered details about the formation and behavior of mobile, microscopic, particle-like objects called "excitons" in a class of materials.....»»
Coupling excitons to polaritons for better solar cells and higher intensity LEDs
In solar cells and light-emitting diodes, maintaining the excited state kinetics of molecules against annihilation is a race against time. These systems need to strike a careful balance between different processes that lead to loss of energy and thos.....»»
Scientists identify new class of semiconductor nanocrystals
U.S. Naval Research Laboratory (NRL) scientists confirm the identification of a new class of semiconductor nanocrystals with bright ground-state excitons, a significant advancement in the field of optoelectronics, in an article published in the Ameri.....»»
Nanoscale trilayer exhibits ultrafast charge transfer in semiconductor materials
Successfully innovating optoelectronic semiconductor devices depends a lot on moving charges and excitons—electron-hole pairs—in specified directions for the purpose of creating fuels or electricity......»»
Aging Might Not Be Inevitable
There are biological underpinnings to aging—and so researchers are investigating cell manipulations, transfusions of young blood, and chemical compounds that can mimic low-calorie diets......»»
Scientists create the thinnest lens on Earth, enabled by excitons
Lenses are used to bend and focus light. Normal lenses rely on their curved shape to achieve this effect, but physicists from the University of Amsterdam and Stanford University have made a flat lens of only three atoms thick that relies on quantum e.....»»
Evidence that atomically thin hafnium telluride is an excitonic insulator
The condensation of excitons with non-zero momentum can give rise to so-called charge density waves (CDW). This phenomenon can prompt the transition of materials into a fascinating new quantum phase, known as an excitonic insulator......»»
Exploring new physics arising from electron interactions in semiconductor moiré superlattices
Semiconductor moiré superlattices are fascinating material structures that have been found to be promising for studying correlated electron states and quantum physics phenomena. These structures, made up of artificial atom arrays arranged in a so-ca.....»»
Gmail’s AI-powered spam detection is its biggest security upgrade in years
Gmail's spam filters can now understand "adversarial text manipulations." Enlarge (credit: Getty Images | pagadesign) The latest post on the Google Security blog details a new upgrade to Gmail's spam filters that Google.....»»
Next-gen computing: Hard-to-move quasiparticles glide up pyramid edges
A new kind of "wire" for moving excitons, developed at the University of Michigan, could help enable a new class of devices, perhaps including room temperature quantum computers......»»
The formation of an excitonic Mott insulator state in a moiré superlattice
When a negatively charged electron and a positively charged hole in a pair remain bound together following excitation by light, they produce states known as excitons. These states can influence the optical properties of materials, in turn enabling th.....»»
Recent manipulations of excitons in moiré superlattices
Light can excite electron and hole pairs inside semiconducting materials. If the attraction between a negatively charged electron and a positively charged hole (the antiparticle of electron in solid state physics) is strong, they stay bound together,.....»»
New gene-editing technique offers path to precision therapies
PNP editing is emerging as a versatile and programmable tool for site-specific DNA manipulations. An innovative genome-editing technique could enhance the delivery, specificity and targeting of gene-modifying tools for treatments......»»
Tailoring quantum oscillations of a Bose-Einstein condensate of excitons as qubits
What plagues quantum upscaling? Most quantum computing devices are dependent on using complex physical phenomena that are either very short-lived (~10-12 seconds) and/or only survive at ultra-low temperatures (e.g., 10-3 to 10-6 Kelvin) and/or requir.....»»
Study finds a solution to longstanding problem of ultrafast valley decoherence
Since the realization that a linearly polarized light can create K-K' valley coherent excitons in monolayer transition metal dichalcogenide (TMDC) semiconductors back in 2013, it has been a longstanding goal for researchers to use these excitonic sta.....»»
Scientists develop a robot that performs genetic manipulations of C. elegans
A robotic system capable of imaging and transferring the model organism Caenorhabditis elegans could replace hours of tedious lab work, according to a study published in PNAS Nexus......»»
Researchers determine chloroplast size unlikely option for improving photosynthetic efficiency
A group of RIPE researchers have found, for the first time, that chloroplast size manipulations are unlikely to be an option for increasing crop photosynthetic efficiency. Their work was recently published in New Phytologist......»»
Heterostructure lets excitons carry more information for quantum applications
Excitons are electron-hole pairs in semiconductors that are electrostatically bound by strong Coulombic interactions. In ultrathin 2D semiconductors that are a few atoms thick (typically ~0.7 nm), the decreased z-dimension presents strong quantum con.....»»
Directly imaging quantum states in two-dimensional materials
When some semiconductors absorb light, excitons (or particle pairs made of an electron bound to an electron hole) can form. Two-dimensional crystals of tungsten disulfide (WS2) have unique exciton states that are not found in other materials. However.....»»
Electrical control of hybrid exciton transport in a van der Waals heterostructure
EPFL engineers have found a way to control the interactions between excitons—quasiparticles that may one day transport data and replace the electrons in electronic devices. The engineers' method involves applying an electric field to a two-dimensio.....»»