Articles tagged with Superconductors
Scientists at NIST and partner institutions report strong evidence that magnetic fluctuations enable resistance-free passage of electric current in high-temperature superconductors. The findings should open new avenues of research into the exotic properties of these materials.
Physicists verify Chandra Varma's microscopic theory of high-temperature superconductivity using neutron scattering experiments. The results suggest ways to fabricate room temperature superconductors and shed light on a major mystery in physics.
Duke University researchers propose a new 'metal sandwich' alloy that could be superconductive at a higher temperature than current materials. Lithium monoboride, a binary alloy of boron and lithium, may have the potential to break the record for highest superconducting temperature.
Researchers observed anomalous signatures in lattice vibrations, suggesting dynamic stripes are present in copper-oxide superconductors. The findings support earlier controversial claims and may help explain the superconducting mechanism.
Researchers have discovered a material that exhibits similar energy scales and gaps to high-temperature superconductors despite being a non-superconductor. The finding is a new wrinkle in the ongoing quest to understand the mechanism of electron pairing, which remains a key mystery.
Researchers have created a conveyor belt for magnetic flux vortices in superconductors, allowing them to be removed from targeted regions and improving device performance. The conveyor belt is assembled out of a line of vortices controlled by a time-varying magnetic field.
Researchers have developed a method to estimate oxygen levels in grain boundaries of superconductors, which can enhance their critical current density. This technique, called pressure-induced oxygen relaxation, could make it easier to manufacture reliable ceramic superconductors.
Scientists have confirmed a long-standing mystery in high-temperature superconductors: lightly doped Mott insulators remain insulators. Strong electron interaction is the key to understanding this phenomenon. The research was funded by the National Science Foundation.
Pitt researchers Yadin Y. Goldschmidt and Eduardo Cuansing used computer simulations to find direct evidence of new vortex patterns in superconductors. These findings show that the vortices can behave differently in the presence of columnar defects, leading to two-stage melting instead of one at higher temperatures.
Researchers found that a nanoscale corrugated surface increases YBCO films' current-carrying capacity by over 30%. This suggests that some degree of substrate roughness might improve high-temperature superconductor performance.
Researchers at Cornell University have made a breakthrough in understanding superconductors by locating crucial atoms that increase conductivity but decrease it in localized spots. This discovery could lead to the development of more effective superconductors and unlock new materials for various applications.
Scientists have found magnetic fluctuations responsible for superconductivity in a compound called plutonium-cobalt-pentagallium (PuCoGa5). This 'unconventional superconductivity' could lead to a new class of superconducting materials and the synthesis of room-temperature superconductors.
Researchers used point-contact spectroscopy to explore Andreev reflection between a normal metal and a heavy-fermion superconductor. The findings show that conventional theories cannot account for the data, indicating the need for new theoretical frameworks.
Researchers find high-temperature superconductors break Pauli principle due to linked high- and low-energy scales. Strong electron interactions cause mixing of energy levels, affecting renormalization and spectral features.
Researchers created high-quality superconducting wires with molecular dimensions, showing that theories apply to molecular-scale superconductors. The nanowires showed a remarkably weak effect on magnetic fields, contradicting previous expectations.
Researchers have confirmed the existence of an odd-parity superconductor, a new electronic state in materials that can carry electric current without resistance. The strontium ruthenate Sr2RuO4 SQUID experiment provides direct evidence for this previously theorized but never demonstrated state.
A team of scientists at Los Alamos National Laboratory discovered a way to control defects in superconducting materials, leading to a two-to-five-fold increase in current densities in high magnetic fields. This breakthrough could revolutionize the development of powerful and energy-efficient superconducting electric motors and generators.
Researchers have explained puzzling behavior in a high-temperature superconductor by discovering an electronic crystal, where electrons arrange themselves into a neat pattern. This phenomenon occurs in a phase called pseudogap and was observed using a highly sensitive scanning tunneling microscope.
Researchers discovered a significant deviation from expected symmetry in the density of states of excitations in high-temperature superconducting tunnel junctions. The findings suggest that crystals of high-temperature superconductors, with a titanate layer, exhibit intrinsic particle-hole asymmetry.
Researchers at LSU are working on creating superconducting microfibers that can reduce the cost of magnets in space travel, making it more efficient. The new technology has the potential to confine plasma for power generation and propulsion in spacecraft.
Researchers at Ames Laboratory have successfully developed a new type of superconductor, carbon-doped magnesium diboride, which can withstand higher magnetic fields. The material has a critical temperature of 39 Kelvin, making it more economical to use compared to other superconductors.
Researchers at Brookhaven National Laboratory found that adding calcium to a high-temperature superconductor increases its ability to carry electric current. The study used a YBCO bicrystal and transmission electron microscope to visualize the effects of calcium doping on grain boundaries, revealing a 35% increase in current flow.
Researchers studying lanthanum barium copper oxygen (LBCO) found that adding barium creates electron holes, which are necessary for superconductivity. The study suggests that fluid stripes may be essential for high-temperature superconductivity in these materials.
The company has achieved an industrial world record by producing second-generation superconducting wires with high amperage electrical current and virtually no resistance. This technology can increase the efficiency of large electric motors by up to 50% and enable smaller, more powerful magnetic resonance imaging machines.
Researchers observed electronlike excitations at temperatures above the transition temperature in cobaltate materials, suggesting a novel mechanism for high-temperature superconductivity. This discovery opens up new avenues for understanding the phenomenon of high-temperature superconductivity.
The study identifies three key factors: tunnelling, competing order, and charge imbalance. By understanding these mechanisms, scientists can develop superconducting materials with higher critical temperatures, leading to significant implications for industries like medical imaging and electrical power transmission.
Researchers at the University of Illinois have found a hidden pattern in cuprate superconductors that may help explain high-temperature superconductivity. The pattern, which forms when electrons are heated, is a distinct type of movement in which electrons organize into a checkerboard pattern.
A new synthesis method for sodium cobalt oxyhydrate, a type of superconductor containing water, has been developed by Brookhaven chemist Sangmoon Park. This method produces large quantities of the material without requiring hazardous substances, making it easier to further analyze its properties.
Researchers at NIST have developed advanced superconducting wires that can withstand strain without cracking, enabling the use of compact underground cables to expand grid capacity. The strain tolerance of these future high-temperature superconductor (HTS) wires is high enough for demanding electric utility applications.
Researchers at Brown University and NIST have confirmed and extended Abrikosov's Nobel theory by tracking current eddies in a type II superconductor. The study revealed complex behavior and provided experimental confirmation of Abrikosov's prediction about smooth phase transitions.
New study enhances earlier paper on congestive heart failure analysis by adding clinical data, enabling mortality risk determination. Researchers also discover new type of superconductor that carries more current and remains stable in higher magnetic fields. Additionally, carbon nanotube transistors exhibit performance improvements reg...
Scientists have observed eight-fold configuration of quasiparticle interference in a high-Tc superconductor, predicting a peculiar electronic state known as the 'stripe phase.' This discovery calls into question the necessity of stripes for superconductivity in high-temperature materials.
Researchers are investigating novel quantum states by examining materials in reduced dimensions, which confine electron flow. This approach has led to the discovery of unusual metals and a better understanding of phase transitions at quantum limits.
Researchers have successfully measured electrical resistance and magnetic properties of lithium under extreme conditions. The discovery reveals multiple transitions in the element's structure, reevaluating its properties.
Researchers at the University of Illinois at Urbana-Champaign have found several new pieces to the puzzle of high-temperature superconductors by imaging the copper-oxide plane. They discovered that the surface behavior is different from when buried inside the crystal, offering additional insight into high-temperature superconductors.
Theoretical study reveals MgB2's anomalous behavior arises from two separate electron populations with different bonding arrangements. The research suggests the possibility of creating new materials with analogous electronic structure, providing insights into high-temperature superconductivity.
Researchers at Ohio State University have found that certain ceramic materials, called cuprates, can switch between two types of superconductivity under specific circumstances. This discovery could settle a long-standing controversy among scientists and potentially lead to the development of buckyball-like superconductivity in ceramics.
Researchers have discovered that electrons in conducting-insulating materials interact strongly when excited, allowing them to move between planes and exhibit metal-like behavior. The critical temperature for this change ranges from -100 to -300 degrees Fahrenheit, depending on the material.
Researchers at the University of California, Davis, predict that lithium borocarbide can be a superconductor at temperatures as low as minus 280 F. They propose using 'field-effect doping' to modify the material, which could lead to better performance than existing superconductors like magnesium diboride.
Researchers developed a new method to wind coils from fragile conductor, using an insulating layer folded lengthways around the tape to prevent discharges. The new superconducting transformer is compact and light, making it attractive for use in trains and large town centres.
A team of physicists has discovered evidence of an unusual, fluctuating magnetic order in high-temperature superconductors, which could be crucial for explaining this phenomenon. This discovery was made using neutron beams to investigate the properties of a high temperature superconductor.
Physicists at Rice University have discovered a new class of critical point that marks a substantial advance in the study of phase transitions. They found that under suitable conditions, quantum critical metals contain 'critical local excitations' with very low energy, which could be applicable to a range of strongly correlated metals.
Researchers at Northwestern University have developed a new imaging method that uses high-temperature superconductors to improve Magnetic Resonance Imaging (MRI) technologies. The breakthrough, led by Professor William Halperin, enables the study of superconducting vortices in tiny crystals with unprecedented spatial resolution.
Researchers at Cornell University propose that silver-flourine compounds could exhibit high-temperature superconductivity, building on similarities to oxocuprates. Theoretical predictions are supported by detailed calculations and chemical reasoning, but experimental production will be challenging.
Scientists have successfully visualized the transition of magnetic whirlpools in superconductors from solid to liquid states and back again under temperature variations. This study reveals complex solid-liquid patterns and provides insights into how temperature changes affect superconductor performance.
Researchers used a scanning tunneling microscope to visualize the electron clouds around impurities in copper oxide superconductors, shedding light on their behavior and potential applications. The study provides new insights into the mechanism of high-critical-temperature superconductivity.
Researchers used angle-resolved photoemission spectroscopy to study the electronic structure of Nd-LSCO, finding charge carriers segregated into one-dimensional lines and exhibiting quantum fluctuations that give rise to two-dimensional effects. This discovery may help resolve a paradox between different theories of superconductivity.
Researchers propose using an alternating current to pattern a sawtooth-like structure on a superconductor, directing vortices away from the device. This method avoids sophisticated material processing and can be used in both low-temperature and high-temperature superconductors.
A new technique allows researchers to design materials with specific grain boundary structures, giving 'smart' characteristics. This could enable the creation of self-regulating superconductors that can switch off during power surges, improving chip quality and lifespan.
Researchers found that at high temperatures, a phenomenon called the surface barrier slows down columns of dynamic magnetic fields, allowing current to flow along the edge. This discovery throws new light on superconductor properties and may lead to advanced materials with improved properties.
Scientists have discovered that sulfur transforms into a superconductor at extremely high pressure, with a critical temperature of 10 K. The findings provide an important test for theories of superconductivity and could lead to new energy-related applications.
Researchers at the University of Illinois have discovered a new state of matter in high-temperature superconductors, characterized by broken time-reversal symmetry. The material exhibits spontaneous currents and magnetic fields, creating a unique pairing mechanism.
Scientists at UB and IBM have reported the first irrefutable proof that d-wave theory is responsible for high-temperature superconductivity in a thallium thin film. This finding builds on earlier work and provides conclusive evidence for proponents of the d-wave theory.
The Department of Energy's Oak Ridge National Laboratory (ORNL) has signed a CRADA with American Magnetics Inc. to produce high-temperature superconductor leads, promising improved energy efficiency and smaller size in cryogenic systems. The new leads will be stronger, carry more current, and reduce cryogen costs.