Articles tagged with Quantum Hall Effect
Researchers have developed a novel quantum material that can naturally enable the study of non-Hermitian dynamics, a phenomenon where systems exhibit unusual behaviors. The material, a magnetic topological insulator, allows for the creation of electronic networks with direction-dependent connections, enabling the accumulation of states...
Scientists at SUSTech and collaborators report first experimental observation of one-sided chiral hinge states in a 3D magnetic Weyl photonic crystal, verifying the 3D QHE of Fermi arcs. The discovery reveals a new physical mechanism for robust light transport in 3D space with potential applications in topological photonic devices.
Researchers show math underlying quantum gravity bears resemblance to quantum Hall effect, resolving cosmological constant problem. The Chern-Simons-Kodama state, a proposed ground state of quantum gravity, has a similar topology that keeps the cosmological constant's value stable.
Researchers investigate fractional quantum Hall effect in twisted MoTe2, revealing spontaneous ferromagnetic transitions and exotic correlated phases. The study identifies characteristic spectroscopic signatures of these phases, providing a unified framework for interpreting existing measurements.
Researchers propose a 3D quantum anomalous Hall effect in Weyl semimetals, revealing unique boundary states and transport properties. The discovery completes the Hall effect family in three dimensions, holding promise for applications in low-power electronics and programmable devices.
Researchers observe anomalous topological pumping in hyperbolic lattices with constant negative curvature. The ground-state band carries topological invariants equivalent to 8D quantum Hall physics, enabling quantized transport velocities matching predictions for eight-dimensional systems.
Scientists from TU Delft have demonstrated quantum spin currents in graphene without external magnetic fields, a crucial step towards spintronics and next-generation technologies. These robust spintronic devices promise advancements in quantum computing and memory devices.
Researchers have identified promising material platforms and pathways to create Z3 parafermions, enabling Fibonacci anyonic statistics and universal topological quantum computation. High-filling states and coupling FQAHE with superconductivity are potential approaches.
Researchers at Columbia University have discovered over a dozen new quantum states in twisted molybdenum ditelluride, which can be created without an external magnet. These states hold promise for building topological quantum computers with unique properties that could reduce errors and improve performance.
Researchers at the University of Gothenburg have made a breakthrough in developing a new low-cost computer using spintronics, which enables information transmission at room temperature. The study demonstrates the ability to control and synchronize spin waves in complex networks, paving the way for the next generation of Ising machines.
The KAIST research team developed an AI-based technique to accurately predict Hall thruster performance, significantly reducing the time and cost associated with iterative design, fabrication, and testing. The trained neural network ensemble model offers detailed analyses of performance parameters, accounting for key design variables.
Researchers at the University of Utah and UCI have discovered a unique quantum behavior that allows for the manipulation of electron-spin and magnetization through electrical currents. This phenomenon, dubbed anomalous Hall torque, has potential applications in neuromorphic computing.
Researchers from Pohang University of Science & Technology confirm the existence of hidden transport pathways in graphene, which enables faster and more efficient data handling. The study sheds light on the 'Valley Hall Effect' and its role in nonlocal resistance, providing crucial insights for advancing valleytronics device design.
Physicists at Brown University have observed a novel class of quantum particles called fractional excitons, which behave in unexpected ways. The discovery unlocks a range of novel quantum phases of matter, presenting a new frontier for future research.
A team of researchers from Institute of Science Tokyo discovered a large in-plane anomalous Hall effect in EuCd₂Sb₂ films under in-plane magnetic fields. This finding opens up new strategies for controlling electronic transport and advances applications in magnetic sensors.
The quantum Hall effect produces a magnetic current in addition to the well-known electric current, allowing for more efficient devices. This breakthrough could enable the creation of new types of electronic devices without energy loss.
Researchers at the University of Würzburg have experimentally implemented a quantum resistance standard that can operate without an externally applied magnetic field. This milestone enables precise measurements essential in industrial production and electronics, reaching thresholds comparable to early conventional standards.
A recent study has lifted the veil of topological censorship by revealing a meandering conduction channel that can carry quantized bulk current. The researchers identified mechanisms that allow for tuning between qualitatively different microscopic implementations, challenging traditional theories.
Researchers have unveiled a new class of quantum critical metal that sheds light on intricate electron interactions. The discovery could lead to the development of electronic devices with extreme sensitivity, driven by unique properties of quantum-critical systems.
A team of researchers has discovered novel and unexpected phenomena when studying fractional quantum Hall effects in flatland systems. By applying a supplementary current to high mobility semiconductor devices, they were able to explore new non-equilibrium states of these quantum systems and reveal entirely new states of matter.
A team of experimental physicists has achieved a breakthrough in topological quantum computing by inducing superconducting effects in edge-only materials. This discovery could lead to the development of stable and efficient quantum computers, with potential applications in fields like quantum computing and technological advancements.
Researchers at Columbia University and colleagues have developed a new method to synthesize large-area graphene without oxygen, leading to reproducible and high-quality samples. The technique eliminates trace oxygen, which has previously affected the growth rate and quality of graphene.
Scientists at ETH Zurich create an artificial solid with switched-on interactions using magnetic fields, observing surprising topological effects. The study reveals the ability to transport particles by one lattice site, mimicking a screw's motion, and demonstrates robustness against disorder.
Researchers developed a new measurement method that significantly improves the accuracy of electrical resistance measurements, leveraging the Quantum Anomalous Hall Effect. The method allows for precise measurements at high currents and without an external magnetic field, making it suitable for advanced applications.
Researchers visualize chiral interface state at atomic scale for the first time, allowing on-demand creation of conducting channels. The technique has promise for building tunable networks of electron channels and advancing quantum computing.
Researchers have experimentally verified the parity anomaly in a topological insulator, which leads to spectral asymmetry and an unusual change in electrical resistance. This finding is generic for any topological insulator and opens up new avenues for exploring topological insulator physics.
Researchers discovered charge fractionalisation in an iron-based metallic ferromagnet using laser ARPES spectroscopy, revealing collective excitations and quasiparticles. The study challenges fundamental quantum mechanics by showing electrons can behave as independent entities with fractionally charged pockets.
A research team has discovered a material that exhibits non-linear Hall effect, which could be applied in technologies for controlled use of terahertz high-frequency signals on electronic chips. The thin-layer films can be applied to plastic substrates and control the effect through micro-fabrication.
Physicists at Princeton University have observed long-range quantum coherence effects due to Aharonov-Bohm interference in a bismuth bromide topological insulator-based device. This finding could lead to the development of spin-based electronics with higher energy efficiency and new platforms for quantum information science.
A team of researchers at Penn State has developed a new electrical method to control the direction of electron flow in promising materials for quantum computing. This method, which uses a 5-millisecond current pulse, impacts the internal magnetism of the material and causes electrons to change directions.
Researchers at Ohio State University have detected a previously unknown physics phenomenon, the orbital Hall effect, which could revolutionize data storage in future computer devices. The study's findings suggest that utilizing orbital currents instead of spin currents could lead to lower energy consumption and higher speeds.
Researchers discovered that electrons flow through the bulk of a special type of insulator, rather than at the edges, using magnetic imaging. This finding provides new insights into electron behavior in quantum Hall insulators and informs the development of topological materials for next-generation quantum devices.
A team at the University of Washington has made a breakthrough in quantum computing by detecting signatures of 'fractional quantum anomalous Hall' (FQAH) states in semiconductor materials. This discovery marks a significant step towards building stable qubits and potentially developing fault-tolerant quantum computers.
Scientists at RMIT University and partner organisation confirm electric control of superconductivity and giant anomalous Hall effect in the kagome metal CsV₃Sb₅. Proton intercalation modulates carrier density, allowing for tuning of Fermi surfaces and potentially realizing exotic quantum phase transitions.
Researchers clarify key aspects of thermal Hall effect in magnetic insulator, reaching novel conclusions and advancing understanding of topological quantum matter. The study utilizes ruthenium chloride to demonstrate the first example of a magnetic insulator exhibiting the thermal Hall effect from quantum edge modes.
The book delves into the concept of emergence in two domains: condensed matter physics and quantum gravity. It reveals surprising connections between seemingly disparate areas of physics, shedding light on how mysterious materials work and the origins of space and time.
Researchers at ICFO successfully simulated a topological gauge theory using ultracold potassium atoms dressed with laser light, moving beyond previous electromagnetism simulations. This breakthrough allows for better understanding of exotic quantum behavior in materials and error correction codes for future quantum computers.
Physicists at ETH Zurich demonstrate that vacuum fluctuations can cause a breakdown of topological protection in the integer quantum Hall effect. Exposing a quantum Hall system to strongly enhanced quantum vacuum fluctuations of a tight cavity provides a novel route to modify quantum states.
Researchers at PSI's Laboratory for Muon Spin Spectroscopy have discovered strong evidence of exotic charge order and orbital currents in a correlated kagome superconductor. The findings provide a new insight into unconventional superconductivity and its relationship with the quantum anomalous Hall effect.
Researchers have demonstrated a novel semiconductor exhibiting an unconventional large anomalous Hall resistance in the absence of large-scale magnetic ordering. The findings validate a recent theoretical prediction and provide new insights into the phenomenon.
Theorists have observed a rare phenomenon called the quantum anomalous Hall effect in bilayer graphene, a naturally occurring, two-atom thin layer of carbon atoms. The researchers found eight different ground states exhibiting ferromagnetism and ferroelectricity simultaneously.
Researchers explore joining topological insulators with magnetic materials to achieve quantum anomalous Hall effect, promising building blocks for low-power electronics. The 'cocktail' approach allows tuning of both magnetism and topology in individual materials, enabling operation closer to room temperature.
Biochemical processes exhibit topological protection, ensuring robustness to changes in system shape or disorder. Edge currents emerge from futile cycles, driven by energy consumption, and are linked to out-of-equilibrium nature.
A team of researchers has identified an unconventional Hall effect driven by the Berry curvature, which is exclusive to semiconductor hole systems. This discovery is a major breakthrough in the search for topological effects in non-equilibrium systems.
Scientists at Max Planck Institute show that electron system of ZrTe5 remains three-dimensional even in strong magnetic fields, linking quasi-quantization to quantum-Hall physics. This finding promises a unified explanation for puzzling plateaus in Hall measurements in many three-dimensional materials.
Researchers at TU Dresden developed a theoretical model that explains how electrons move through three-dimensional materials, even when their electric transport appears two-dimensional. The findings have implications for topological quantum phenomena and could lead to powerful quantum technologies.
Researchers at UC Berkeley developed a new way to harness light waves, enabling the simultaneous transmission of vast amounts of data. The technology uses twisted laser beams and exploits the property of orbital angular momentum, which offers exponentially greater data capacity.
Researchers reviewed the fundamental theories underpinning the quantum anomalous Hall effect (QAHE), a key feature of emerging 'quantum' materials. QAHE causes zero-resistance electrical current along material edges and has potential for reducing power consumption in electronic devices.
Researchers elucidate a global picture of edge states in Weyl semimetals, revealing how they form closed trajectories under tilted magnetic fields. The study provides new understanding of the three-dimensional quantum Hall effect and its relation to topological properties.
Researchers have found a link between 2D and 3D phases of topological matter, reviving the quantum Hall effect in 3D superconductors. This connection could enable fault-tolerant quantum computing using entangled states protected by long-range quantum entanglement.
Researchers have discovered high-Chern-number and high-temperature Chern insulator states in MnBi2Te4 devices, exceeding previous records by achieving two dissipationless edge states above 10 K. The findings have the potential to revolutionize low-consumption electronics and integrated circuits.
The study reveals the emergence of fractional quantum Hall effect in double-layer graphene, with new states exhibiting excellent agreement with composite fermion model. However, some features remain unexplained, suggesting pairing interaction between composite fermions and potentially hosting non-Abelian wave functions.
The researchers observed an unusual quantum Hall effect in bulk graphite, which is typically only possible in two-dimensional systems. The material behaves differently depending on whether it contains odd or even number of graphene layers, with surprising results persisting for hundreds of layers thick.
Researchers from China and Germany discover the geometric phase effect in a benchmark chemical reaction, providing new insights into molecular systems with conical intersections. The study uses high-resolution velocity map ion imaging technique to observe rapid oscillations of H2 products, which can only be reproduced by theoretical ca...
Researchers have developed a new artificial quantum material that can control internal resistance in multilayered magnetically doped semiconductors, enabling the creation of high-efficiency computers. The material exploits the Quantum Anomalous Hall Effect, allowing for faster computation speeds and improved energy efficiency.
Researchers from ETH Zurich, USA, Germany, Italy, and Israel create a four-dimensional physical phenomenon in two dimensions using the quantum Hall effect. The team, led by Oded Zilberberg, demonstrates a virtual fourth dimension through topological pumping, enabling the observation of four-dimensional quantum Hall effect characteristics.
Researchers at Penn State and ETH Zurich have demonstrated the behavior of particles of light in a two-dimensional array of waveguides, matching predictions for the four-dimensional quantum Hall effect. This achievement provides evidence for higher-dimensional quantum Hall physics, with potential applications in novel photonic devices.
Researchers have demonstrated a new quantum effect in topological insulators, allowing for precise measurement of fundamental physical parameters like the fine-structure constant. This breakthrough could lead to more accurate and innovative methods of measurement.
Researchers at RIKEN discovered that photons exhibit a quantum spin Hall effect, leading to unusual properties and topological phenomena. This finding has implications for the development of optical devices and materials science.
Researchers at RIKEN have successfully demonstrated the integer quantum Hall effect in a new type of film, known as a 3D topological insulator. By quantizing surface Dirac states, they overcame limitations that had hindered previous efforts to harness these materials for low-power consumption electronics.