When a superconductor is exposed to a magnetic field, a current on its surface appears which creates a counter field that cancels the magnetic field inside the superconductor. This phenomenon, known as "Meissner-Ochsenfeld ...
Quantum Physics
Jul 9, 2014
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Columbia researchers have observed the fractional quantum Hall effect in bilayer graphene and shown that this exotic state of matter can be tuned by an electric field.
Nanophysics
Jul 3, 2014
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Only a few elements in the periodic table are inherently magnetic. Iron is perhaps the best known, but cobalt and nickel also exhibit this type of ferromagnetism. Scientists have recently discovered, however, that gold, silver, ...
General Physics
Jan 31, 2014
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(Phys.org) —Graphene has become an all-purpose wonder material, spurring armies of researchers to explore new possibilities for this two-dimensional lattice of pure carbon. But new research at MIT has found additional potential ...
Nanophysics
Dec 22, 2013
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In a paper appearing in Nature's Scientific Reports, Dr. Ramesh Mani, professor of physics and astronomy at Georgia State University, reports that, in the presence of a magnetic field, negative resistivity can produce a positive ...
General Physics
Dec 11, 2013
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(Phys.org) —It is fascinating how quantum mechanical behavior of particles at smallest scales can give rise to strange properties that can be observed in the classical world. One example is the Fractional Quantum Hall Effect ...
Quantum Physics
Nov 28, 2013
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(Phys.org) —After more than 40 years of intense research, experimental physicists still seek to explore the rich behaviour of electrons confined to a two-dimensional crystalline structure exposed to large magnetic fields. ...
Quantum Physics
Oct 30, 2013
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Scientists have a new way to edge around a difficult problem in quantum physics, now that a research team from the National Institute of Standards and Technology (NIST) and University of Maryland's Joint Quantum Institute ...
Optics & Photonics
Oct 23, 2013
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(Phys.org) —Topology—the understanding of how things are connected—remains abstract, even with the popular example of doughnuts and coffee cups. This concept, esoteric as it appears, is also neat because it is the basis ...
Optics & Photonics
Oct 21, 2013
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Researchers at the National Institute of Standards and Technology have reported in Nature the first observation of the "spin Hall effect" in a Bose-Einstein condensate (BEC), a cloud of ultracold atoms acting as a single ...
Quantum Physics
Jun 5, 2013
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