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Latest Quantum Hall effect Stories

2012-03-30 08:12:44

University of Arizona physicists are making discoveries that may advance electronic circuit technology Graphite, more commonly known as pencil lead, could become the next big thing in the quest for smaller and less power-hungry electronics. Resembling chicken wire on a nano scale, graphene — single sheets of graphite — is only one atom thick, making it the world's thinnest material. Two million graphene sheets stacked up would not be as thick as a credit card. The tricky...

2011-11-04 23:18:01

Physicists from the Georgia Institute of Technology have developed a theory that describes, in a unified manner, the coexistence of liquid and pinned solid phases of electrons in two dimensions under the influence of a magnetic field. The theory also describes the transition between these phases as the field is varied. The theoretical predictions by Constantine Yannouleas and Uzi Landman, from Georgia Tech´s School of Physics, aim to explain and provide insights into the origins of...

2011-09-29 11:01:49

New research using graphene presents the most precise measurements of the quantum Hall effect ever made, 1 of the key steps in the process to redefine 2 SI units Groundbreaking research by the National Physical Laboratory's (NPL) Quantum Detection Group and an international team of collaborators is underpinning the biggest change in the Système Internationale d'unités (SI Units) since the system began 50 years ago. It has long been the goal of scientists to...

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2010-08-10 09:02:55

Researchers have taken one more step toward understanding the unique and often unexpected properties of graphene, a two-dimensional carbon material that has attracted interest because of its potential applications in future generations of electronic devices. In the Aug. 8 advance online edition of the journal Nature Physics, researchers from the Georgia Institute of Technology and the National Institute of Standards and Technology (NIST) describe for the first time how the orbits of electrons...

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2010-08-02 06:27:42

Subjected to a 3-point stretch, graphene develops bubbles of quantized electrons Graphene, a sheet of pure carbon heralded as a possible replacement for silicon-based semiconductors, has been found to have a unique and amazing property that could make it even more suitable for future electronic devices. Physicists at the University of California, Berkeley, and the Lawrence Berkeley National Laboratory (LBNL) have found that when graphene is stretched in a specific way it sprouts nanobubbles...

2010-04-29 12:54:43

With its new molecular beam epitaxy facility, PTB continues to be the only metrology institute to produce primary quantum Hall effect resistance standards For a long time, the electrical units are feeling at home in the quantum world. In the endeavor to trace the entire International System of Units (SI) back to natural constants, they have long been in the lead - because, among other things, the resistance can be realized with the aid of the quantum Hall effect. The Physikalisch-Technische...

2010-01-19 18:33:02

A collaborative research project has brought the world a step closer to producing a new material on which future nanotechnology could be based. Researchers across Europe, including the UK's National Physical Laboratory (NPL), have demonstrated how an incredible material, graphene, could hold the key to the future of high-speed electronics, such as micro-chips and touchscreen technology. Graphene has long shown potential, but has previously only been produced on a very small scale, limiting...

2009-11-17 14:13:58

First, it was the soccer-ball-shaped molecules dubbed buckyballs. Then it was the cylindrically shaped nanotubes. Now, the hottest new material in physics and nanotechnology is graphene: a remarkably flat molecule made of carbon atoms arranged in hexagonal rings much like molecular chicken wire. Not only is this the thinnest material possible, but it also is 10 times stronger than steel and it conducts electricity better than any other known material at room temperature. These and graphene's...

2009-10-14 14:23:55

Previously predicted but unobserved interactions between massless particles may lead to speedy, powerful electronic devices Rutgers researchers have discovered novel electronic properties in two-dimensional sheets of carbon atoms called graphene that could one day be the heart of speedy and powerful electronic devices. The new findings, previously considered possible by physicists but only now being seen in the laboratory, show that electrons in graphene can interact strongly with each other....

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2009-02-15 08:44:53

Discovery paves way for a new type of quantum computing An international team of scientists led by a Princeton University group recently discovered that on the surface of certain materials collective arrangements of electrons move in ways that mimic the presence of a magnetic field where none is present. The finding represents one of the most exotic macroscopic quantum phenomena in condensed-matter physics: a topological Quantum Spin Hall effect. The research could lead to advances in...


Word of the Day
cruet
  • A vial or small glass bottle, especially one for holding vinegar, oil, etc.; a caster for liquids.
This word is Middle English in origin, and ultimately comes from the Old French, diminutive of 'crue,' flask.
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