Supersonic plasticity
Gumbsch and Gao also found that the supersonic speeds only occur when the stress is applied at a single point. At very low strains, the deformations travel subsonically. At intermediate strains, howev...
A ‘sticky’ theory
The French team studied the behaviour of air bubbles on the surface of the sticky polymer film attached to a metal probe. The number and size of the bubbles depends on the surface roughness of the fil...
Statistical physics challenges economics
Once the balance between ‘fundamentalists’ and noise traders is breached the market becomes more volatile and creates boom or bust cycles. For example, Amazon.com is now worth over $30 bil...
Wigner crystal found
Normal metals have an equal number of electrons with spin “up” and spin “down”. However, when there are more spins pointing up than down, or vice versa, the metal becomes a fer...
Perl reveals recipe for success
The history of science is littered with famous scientists who pushed the ‘wrong idea’, Perl told PhysicsWeb. And research organisations do not have a good track record of controlling the d...
Physics misses out in US budget
At the DOE, the budget for basic energy science is set to rise by 11%, with two-thirds of this going to meet construction costs for the Spallation Neutron Source being built at Oak Ridge. Fusion resea...
Hydrogen: a quantum gas at last
Jaakkola observed two-dimensional Bose-Einstein condensation (2D BEC) in a gas of specially prepared hydrogen atoms adsorbed on the surface of liquid helium. In Bose-Einstein condensation all the part...
Stochastic resonance tracked down
Vertical cavity lasers work by having a quantum well sandwiched between alternating layers of gallium arsenide (GaAs) and aluminium gallium arsenide (AlGaAs). As the two materials have different refra...
Green look for red fluorescent lights
The technique works because two different ions, gadolinium and europium, are in the phosphor material. The UV light boosts a gadolinium ion to its excited state. This excess energy is then transferred...
First hint of element 114 seen in Dubna
Researchers at the Dubna Laboratory of Heavy Ion Nuclear Reactions in Russia, headed by Yuri Oganessian, collaborating with a team from the Lawrence Livermore National Laboratory in the US, made the d...
