Articles tagged with Quantum Hall Effect
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.
Recent research on the fractional quantum Hall effect (FQHE) has made significant progress, including the observation of the 5/2 filling state in graphene. This state is an even denominator state that requires new theoretical concepts to understand its many-body physics. FQHE applications in quantum computing are also being explored.
Columbia researchers have observed the fractional quantum Hall effect in bilayer graphene, demonstrating a controllable phase transition by applying electric fields. The team's breakthrough allows for tuning of the charge density and identification of exotic non-abelian states with potential for quantum computation.
Researchers from NIST and JQI have developed a silicon device that can efficiently transport photons, which could lead to significant improvements in computer efficiency. The device uses a novel arrangement of rings to guide photons along the edge of an array, enabling it to function even if some rings are defective.
Researchers at NIST have reported the first observation of the spin Hall effect in a Bose-Einstein condensate, offering new insight into the quantum mechanical world. The phenomenon demonstrates the potential for ultracold atoms to be used as circuit components, paving the way for applications in 'atomtronics'.
Researchers at RIKEN have demonstrated a new material that can eliminate loss in electrical power transmission, opening the door to energy-efficient electronics. The discovery uses magnetic topological insulators, which exhibit unique properties that allow for dissipationless electricity channels.
Researchers at the University of Pittsburgh have discovered a surprising topological semimetal through simple system studies. This new quantum state shares properties with a quantum Hall state but is driven by interaction rather than an applied magnetic field.
Physicists at Georgia Tech developed a unified theory describing coexistence of liquid and pinned solid phases of electrons in 2D under magnetic field. The theory predicts transition between phases as field is varied, showing emergence of hexagonal Wigner crystal with enhanced stability due to quantum correlations.
Scientists have made precise measurements of the quantum Hall effect in graphene, supporting the redefinition of the kilogram and ampere. This breakthrough aims to establish a universal and stable definition for these fundamental constants, linking them to natural quantities.
Researchers at NIST and University of Maryland have developed a new photon loop technology that could lead to more efficient information processors and enable exploration of the quantum Hall effect. The technology uses multiple rows of resonators to build alternate pathways, allowing photons to bypass defects in microchips.
Researchers have produced high-quality graphene on a large scale, overcoming two major barriers to scaling up the technology. The material's electrical characteristics can now be measured with unprecedented precision, paving the way for widespread adoption in high-speed electronics.
Researchers at Rutgers University have discovered novel electronic properties in 2D carbon structure graphene, exhibiting strongly correlated behavior among charge-carrying particles. The findings are similar to superconductivity observed in some metals and complex materials, enabling the flow of electric current with no resistance.
The Richard E. Prange Prize, established by the University of Maryland's Department of Physics and Condensed Matter Theory Center, honors the late Professor Richard Prange's distinguished career. Philip W. Anderson, a pioneering theorist and Nobel laureate, is the inaugural recipient of the prize.
A research team has successfully observed the quantum spin Hall effect, where electrons flow without external stimulus due to internal material structure. This breakthrough could lead to the development of fault-tolerant quantum computers and spin sources suitable for quantum computing and information processing.
Researchers have recorded the quantum Hall effect in a bulk crystal of bismuth-antimony without an external magnetic field, shedding light on unusual electron behavior. This breakthrough could lead to advances in fast quantum computing devices and new electronic technologies.
Researchers have observed the quantum Hall effect in a new form of carbon called graphene at room temperature, pushing the phenomenon's boundaries. The discovery opens up possibilities for measuring resistance standards at elevated temperatures and magnetic fields.
Researchers propose a new state, called the quantum spin Hall effect, which can carry electric currents without doping and displays reduced energy dissipation. This topologically distinct state has extraordinary properties, including edge confinement of electrical current.
Researchers have successfully tested Einstein's relativity theory using ultra-thin Graphene, a material created by extracting graphite via pencil-tracing. This breakthrough enables direct experiments to test relativistic ideas, potentially leading to groundbreaking discoveries.