Articles tagged with Phonons
Comprehensive exploration of living organisms, biological systems, and life processes across all scales from molecules to ecosystems. Encompasses cutting-edge research in biology, genetics, molecular biology, ecology, biochemistry, microbiology, botany, zoology, evolutionary biology, genomics, and biotechnology. Investigates cellular mechanisms, organism development, genetic inheritance, biodiversity conservation, metabolic processes, protein synthesis, DNA sequencing, CRISPR gene editing, stem cell research, and the fundamental principles governing all forms of life on Earth.
Comprehensive medical research, clinical studies, and healthcare sciences focused on disease prevention, diagnosis, and treatment. Encompasses clinical medicine, public health, pharmacology, epidemiology, medical specialties, disease mechanisms, therapeutic interventions, healthcare innovation, precision medicine, telemedicine, medical devices, drug development, clinical trials, patient care, mental health, nutrition science, health policy, and the application of medical science to improve human health, wellbeing, and quality of life across diverse populations.
Comprehensive investigation of human society, behavior, relationships, and social structures through systematic research and analysis. Encompasses psychology, sociology, anthropology, economics, political science, linguistics, education, demography, communications, and social research methodologies. Examines human cognition, social interactions, cultural phenomena, economic systems, political institutions, language and communication, educational processes, population dynamics, and the complex social, cultural, economic, and political forces shaping human societies, communities, and civilizations throughout history and across the contemporary world.
Fundamental study of the non-living natural world, matter, energy, and physical phenomena governing the universe. Encompasses physics, chemistry, earth sciences, atmospheric sciences, oceanography, materials science, and the investigation of physical laws, chemical reactions, geological processes, climate systems, and planetary dynamics. Explores everything from subatomic particles and quantum mechanics to planetary systems and cosmic phenomena, including energy transformations, molecular interactions, elemental properties, weather patterns, tectonic activity, and the fundamental forces and principles underlying the physical nature of reality.
Practical application of scientific knowledge and engineering principles to solve real-world problems and develop innovative technologies. Encompasses all engineering disciplines, technology development, computer science, artificial intelligence, environmental sciences, agriculture, materials applications, energy systems, and industrial innovation. Bridges theoretical research with tangible solutions for infrastructure, manufacturing, computing, communications, transportation, construction, sustainable development, and emerging technologies that advance human capabilities, improve quality of life, and address societal challenges through scientific innovation and technological progress.
Study of the practice, culture, infrastructure, and social dimensions of science itself. Addresses how science is conducted, organized, communicated, and integrated into society. Encompasses research funding mechanisms, scientific publishing systems, peer review processes, academic ethics, science policy, research institutions, scientific collaboration networks, science education, career development, research programs, scientific methods, science communication, and the sociology of scientific discovery. Examines the human, institutional, and cultural aspects of scientific enterprise, knowledge production, and the translation of research into societal benefit.
Comprehensive study of the universe beyond Earth, encompassing celestial objects, cosmic phenomena, and space exploration. Includes astronomy, astrophysics, planetary science, cosmology, space physics, astrobiology, and space technology. Investigates stars, galaxies, planets, moons, asteroids, comets, black holes, nebulae, exoplanets, dark matter, dark energy, cosmic microwave background, stellar evolution, planetary formation, space weather, solar system dynamics, the search for extraterrestrial life, and humanity's efforts to explore, understand, and unlock the mysteries of the cosmos through observation, theory, and space missions.
Comprehensive examination of tools, techniques, methodologies, and approaches used across scientific disciplines to conduct research, collect data, and analyze results. Encompasses experimental procedures, analytical methods, measurement techniques, instrumentation, imaging technologies, spectroscopic methods, laboratory protocols, observational studies, statistical analysis, computational methods, data visualization, quality control, and methodological innovations. Addresses the practical techniques and theoretical frameworks enabling scientists to investigate phenomena, test hypotheses, gather evidence, ensure reproducibility, and generate reliable knowledge through systematic, rigorous investigation across all areas of scientific inquiry.
Study of abstract structures, patterns, quantities, relationships, and logical reasoning through pure and applied mathematical disciplines. Encompasses algebra, calculus, geometry, topology, number theory, analysis, discrete mathematics, mathematical logic, set theory, probability, statistics, and computational mathematics. Investigates mathematical structures, theorems, proofs, algorithms, functions, equations, and the rigorous logical frameworks underlying quantitative reasoning. Provides the foundational language and tools for all scientific fields, enabling precise description of natural phenomena, modeling of complex systems, and the development of technologies across physics, engineering, computer science, economics, and all quantitative sciences.
Researchers at JAIST have demonstrated a high thermal rectification ratio on suspended asymmetric graphene nanomesh devices at low temperatures. The device shows promise for developing a high-efficiency thermal rectifier based on graphene nanomesh structure.
Researchers at Georgia Tech and collaborators observed interfacial phonon modes, confirming their existence and contribution to heat transfer at interfaces. The discovery opens a new pathway for consideration in engineering thermal conductance for electronics cooling.
A new study from Pusan National University suggests that phonological awareness (PA) and phonics instruction can significantly improve the reading skills of English language learners. The meta-analysis of 46 studies found a moderate effect of PA and phonics on word reading, but a larger impact on pseudo-word reading.
Researchers from Peking University developed a new technique using 4D-EELS to measure phonon modes at heterointerfaces, directly observing localized phonon modes for the first time. This breakthrough enables better understanding and control of solid interfaces' properties.
Researchers at Stanford University have developed a new device that brings sound to quantum science experiments, opening up new possibilities for studying solids and phases of matter. The device uses a precise cavity to hold an optical lattice of atoms, which vibrates at around 1 kHz, producing phonons - the building blocks of sound.
The study reveals that the interaction between phonons and electrons is crucial for ultrafast demagnetization. The data show a temperature threshold below which this mechanism does not occur, indicating another microscopic mechanism at lower temperatures.
Scientists from Tokyo Institute of Technology have discovered a new method to manipulate quantum vibrations in solids using polarized light pulses. The research demonstrates the importance of polarization in controlling these vibrations, which could lead to breakthroughs in quantum control and material properties.
A team of researchers from Boston College has created a new metallic specimen where electron motion flows in a fluid-like manner, fundamentally changing particle-like to hydrodynamic dynamics. The discovery confirms theoretical predictions and opens up new possibilities for material exploration and potential applications.
Graphene drum technology induces coherent emission of sound energy quanta, enabling new quantum optomechanical sensors and transducers. The device amplifies external vibrations at specific frequencies, showing potential applications in classical and quantum sensing.
Researchers have demonstrated cooling a large-scale object to nearly the motional quantum ground state, increasing sensitivity in detecting gravitational waves. The method achieved an average phonon occupation of 10.8, suppressing quantum back-action noise by 11 orders of magnitude.
Researchers at NIST successfully entangled two small aluminum drums, measuring the subtle statistical relationships between their motions. They analyzed radar-like signals to verify the fragile entanglement, demonstrating a new capability in large-scale quantum networks.
Scientists at the University of Nottingham have developed an ultrasonic imaging system that can visualize cell abnormalities in 3D using a fiber-optic probe. The technology produces high-resolution images with nanoscopic resolution, enabling more effective diagnoses for diseases such as gastric cancer and bacterial meningitis.
Scientists at Graz University of Technology have successfully imaged surface phonons in three dimensions, revealing the spatial distribution of electromagnetic fields near nanosurfaces. This breakthrough could lead to improved thermal conduction, sensor technology, and energy storage.
Researchers have discovered a way to twist material properties by stacking and slightly rotating 2D layers, which significantly influences the material's properties. This phenomenon, known as the Moiré effect, allows for control over phonon vibrations, potentially leading to new applications in materials science.
Researchers at HZB have developed a method to control lattice vibrations in graphene, enabling the creation of phononic crystals with tunable properties. This breakthrough paves the way for applications in ultrasensitive sensors and quantum technologies.
Researchers discovered that complex oscillations in quantum systems decay over time into a simple Gaussian distribution, driven by interactions. The Vienna group created a synthetic Bose-Einstein condensate to study phonon dynamics, which eventually lost complexity and followed the Gaussian shape.
Researchers perform an experiment that adds or subtracts a single phonon to a high-frequency sound field using laser light interactions. The team's findings show that subtracting a single phonon increases the average number of quanta, defying intuition. This result opens a new path for quantum science and technology with sound waves.
Researchers developed a new theoretical model explaining the spread of vibrations in disordered materials, showing that sound waves lose coherence on shorter length scales. This discovery may lead to the design of heat- and shatter-resistant glass for smartphones and tablets.
Researchers at UCI used advanced electron microscopy to study phonons near defects in cubic silicon carbide, a material used in electronic devices. The team's findings could improve thermal properties and provide insights into defect structures.
Scientists have successfully demonstrated the interaction between infrared light and molecular vibrations, leading to the formation of hybrid polaritons. The study's findings could pave the way for ultrasensitive spectroscopy devices and a deeper understanding of strong vibrational coupling on the nanoscale.
Researchers at Oak Ridge National Laboratory and the University of Tennessee discovered a way to slow phonons, waves that transport heat, in photovoltaic materials. This discovery holds promise for improving novel hot-carrier solar cells, which convert sunlight to electricity more efficiently than conventional solar cells by harnessing...
Researchers at the University of Rochester developed an anti-resonant hollow-core fiber that produces significantly less noise compared to traditional single-mode fibers. This breakthrough enables promising platforms for low-noise applications, including quantum information processing and optical communications.
Researchers develop novel approach for efficient generation of coherent vibrations using semiconductor structures. The phonon laser operates in the tens of GHz range and is based on Einstein's predictions for Bose-Einstein condensates of coupled light-matter particles.
Researchers have discovered strong evidence of quantum fluctuations near a quantum critical point in a copper oxide material, which could lead to new understanding of high-temperature superconductivity. The study used RIXS to map out phonon vibrations and observed unexpectedly strong charge order excitations at the QCP.
Scientists have demonstrated a 'hammer-on' effect in crystals by switching the frequency of atomic motions with an impulsively generated electric current. The technique allows for faster playing and legato, similar to rock guitarists using the hammer-on method.
The US Army has made significant advancements in quantum networking research, which will play a crucial role in future battlefield operations. The researchers have developed a system that can send information quantum-mechanically between nodes without occupying the linking channel.
Scientists at the University of Chicago have developed a new quantum communication technique that bypasses traditional channels, allowing for secure information transfer without photon loss. This breakthrough enables faster and more efficient communication systems, opening up new possibilities for future technologies.
Scientists at Osaka University have successfully demonstrated a quantum random walk using trapped ions, which may lead to new quantum simulations of biological systems. The technique relies on precise control of individual ions and can help resolve open questions in chemistry and biology.
An international team has discovered an effective method for controlling the frequency of confined light at the nanoscale in phonon polaritons. By intercalating alkaline and alkaline earth atoms in van der Waals materials, researchers can extend the range of working frequencies, enabling broader technological applications.
Researchers at the University of Innsbruck have developed a method to cool microparticles using sound waves, enabling quantum experiments without photons. This innovative approach also provides a path to probe and manipulate exotic dynamics of acoustic and magnetic waves in small particles.
Scientists have demonstrated tunable coherent phonon dynamics in nanomechanical resonators, enabling new possibilities for information storage and processing. The work shows high cooperativity and large coupling strength between non-neighbouring phonon modes.
A UC Riverside-led research team has discovered a new quantum process in valleytronics that can speed up the development of this emerging technology. The breakthrough, which uses local energy minima in semiconductors, enables the creation of information processing schemes superior to current charge-based technologies.
Physicists at EPFL's Institute of Physics have successfully created a single phonon in ambient conditions, allowing them to study quantum phenomena in naturally occurring materials. The breakthrough enables the creation of room-temperature ultrafast quantum technologies with potential applications in various fields.
Researchers create and observe a single phonon in diamond at room temperature, bringing quantum behavior closer to everyday life. This breakthrough technique can now be used to probe other materials for quantum vibrations, potentially leading to advancements in solar cells and quantum computing.
Scientists have identified an unusual electron scattering phenomenon in hybrid systems of Bose-Einstein condensates and 2D electron gases. This discovery opens up new possibilities for designing high-temperature superconductors by exploiting the unique interactions between electrons and Bogoliubov quanta.
Researchers at NUS have discovered a new quasiparticle, the polaronic trion, in molybdenum disulphide that can be tuned by both temperature and electric fields. This enables significant tunability in optoelectronic properties.
Researchers create device that exploits quantum principles to detect phonons, enabling precise measurement of individual sound particles and paving the way for new types of quantum devices. This breakthrough could lead to more compact and efficient quantum computers that operate by manipulating sound rather than light.
A team of scientists has developed a method to study ultrafast spin-flip scattering rates in ferromagnetic Nickel and nonmagnetic copper using X-ray emission spectroscopy. As temperature increases, ferromagnetic nickel shows a decrease in emissions due to increased electron-phonon interactions.
Scientists at Tokyo Institute of Technology investigated photogenerated coherent phonons in GaAs using ultrafast dual pump-probe laser for quantum interferometry. They found that impulsive stimulated Raman scattering (ISRS) dominates phonon generation, with ISRS causing zapping of vibrations in the solid lattice.
Scientists demonstrate amplification of optical phonons in a metal-semiconductor nanostructure using THz pulses, showing potential for ultrasound imaging with sub-nanometer resolution. The amplification process relies on population inversion and stimulated emission of phonons.
Scientists have observed a new mode of heat transport in graphite, known as second sound, which behaves like sound when moving through the material. At temperatures above 80K, heat travels through graphite as a wave, cooling points instantly and carrying heat away at close to the speed of sound.
Researchers found that when compressed, cubic boron arsenide's heat conductivity improves initially but then deteriorates due to competition between different processes. This behavior has never been predicted or observed before and challenges conventional understanding of heat conduction.
Researchers have created a quantum fridge with just three atoms, demonstrating the role of quantum effects in thermodynamics. The device, using heat to drive cooling without moving parts, achieves temperatures within 40 microKelvin of absolute zero.
Researchers developed a new method to predict lattice thermal conductivity of solids with high accuracy, removing the need for fitting parameters. This improvement enables more precise design of thermally resistive materials, including those used in thermoelectrics.
A team of international researchers has developed a lasing system that produces phonons, the energy products of oscillation, or vibration. By tuning the system to create resonance, they can trigger mechanical movement that generates an acoustic wave. This breakthrough could lead to new medical and materials science applications.
Researchers at Tokyo Institute of Technology successfully formulated and experimentally verified a unified theory for controlling coherent optical phonons in diamond. The theory explains the generation and detection of coherent optical photons based on a model involving two states of electrons and the quantum harmonic oscillator.
A team of researchers has found a way to couple and precisely control quantum systems using phonons, the smallest units of sound waves. This allows for the creation of a scalable quantum network, enabling new technological breakthroughs.
Researchers create method to detect individual phonons, enabling study of phonon decay and its implications for quantum technologies. The technique uses ultra-short laser pulses to excite and probe phonons in diamond crystals.
Victor Lakhno proposes a new theoretical model for room-temperature superconductivity based on translation-invariant bipolarons. This approach suggests that even small concentrations of TI-bipolarons can enhance critical temperatures, opening up opportunities for creating such materials.
By doping aluminum oxide with neodymium, researchers can control phonon frequencies and speeds, leading to improved thermal conductivity and efficiency in thermoelectric devices. This breakthrough provides a simpler and cheaper way to tune material properties, enabling new applications in solid-state lighting and electronics.
Scientists have discovered a new way to modify phonon response in nanomaterials by harnessing zero-point energy, opening up possibilities for nanophotonics and nanoelectronics applications. The researchers created hybrid nanosystems with novel optical phonon properties.
Researchers found naturally occurring circular rotation in an atomic monolayer crystal of tungsten diselenide, a promising candidate for valleytronics. Controlling this rotation could provide a stable mechanism to carry and store information. The discovery opens possibilities for creating rotors at the molecular scale.
Scientists have successfully achieved strong coupling between distant phonon modes of graphene-based mechanical resonators using a phonon cavity mode. By tuning the resonant frequency of the phonon cavity mode, they can continuously tune the coupling strength between distant phonon modes.
Researchers at UC Riverside used ultraviolet Raman spectroscopy to investigate the strength of electron spin interactions with phonons in antiferromagnetic nickel oxide crystals. The study sheds light on long-standing puzzles surrounding this material and has important implications for developing spintronic devices.
Simulations show that a temperature gradient can displace nanoparticles on graphene membranes, with the force acting like a ballistic wave. Researchers discovered a new phenomenon called thermophoresis ballistic, where vertical thermal oscillations push objects horizontally.
Yi Xie receives the fourth Tsinghua University Press-Springer Nano Research Award for her groundbreaking research on inorganic functional solids. Her work has contributed significantly to the field of inorganic solid state chemistry at the nanoscale, with promising applications in energy conversion.
Joe Feser's $500,000 NSF grant will focus on manipulating heat transfer by phonons using embedded nanoparticles. The research aims to engineer materials with improved thermal properties for applications such as nanostructured electronic and optical materials.
Researchers adapted an instrument for high resolution electron energy loss spectroscopy to reduce the time required to measure phonon dispersion. The device uses a hemispherical electron analyzer and high energy-resolution electron source, allowing surface scientists to measure samples that were previously too cumbersome.
Scientists at New Jersey Institute of Technology propose that cell components store energy on their outer edges, a strategy used by various cells daily. This discovery could lead to the development of new materials with unique properties, including applications in energy-efficient solar cells and sound deadening.
An international team of physicists has made a breakthrough in understanding heat transport at the nanoscale by studying a chain of gold atoms. The study confirms the validity of the Wiedemann-Franz law, which describes the relationship between electric and thermal conductance.