Physicists have discovered that heating can be used to control the curvature of ripples in freestanding graphene. The finding provides fundamental insight into understanding the influence temperature exerts on the dynamics of freestanding graphene. This may drive future applications of the flexible circuits of consumer devices such as cell phones and digital cameras.
Using a quantum material called a correlated oxide, researchers have achieved a reversible change in electrical resistance of eight orders of magnitude, a result the researchers are calling 'colossal.' In short, they have engineered this material to perform comparably with the best silicon switches.
Researchers have found a new way to control the properties of quantum dots, those tiny chunks of semiconductor material that glow different colors depending on their size. Quantum dots, which are so small they start to exhibit atom-like quantum properties, have a wide range of potential applications, from sensors, light-emitting diodes, and solar cells, to fluorescent tags for biomedical imaging and qubits in quantum computing.
To isolate quantum fluctuations that define the properties of a metallic material, scientists probed it at temperatures colder than interstellar space. The research provides new methods to identify and understand promising new materials, including superconductors.
A team of physicists has experimentally observed how the anisotropic properties of particles deform the Fermi surface in a quantum gas. The work provides the basis for future studies on how the geometry of particle interactions may influence the properties of a quantum system.
Physicists read âspinsâ in hydrogen nuclei and used the data to control current in a cheap, plastic LED â at room temperature and without strong magnetic fields. The study brings physics a step closer to practical "spintronic" devices: superfast computers, more compact data storage and plastic or organic LEDs, more efficient than those used today in display screens for cell phones, computers and televisions.
Physicists have observed -- for the first time with such precision -- vibrations of the surface of a heavy nucleus, lead 208Pb. Through their extremely accurate measurements this team has unraveled the details of neutron oscillations in the atomic nucleus and determined how many neutrons on the surface, or âskinâ, of the nucleus participate in unique vibrations known as pygmy resonances. If an accelerated ion of high energy impacts on the nucleus of a heavy element, it makes the nucleus vibrate in a very special manner: all of its neutrons begin to oscillate collectively with respect to all of its protons.
Scientists have observed an exotic disbandment mode in the beta disbandment of the 56Zn. Beta disbandment is one of the most usual kinds of radioactive disbandment and it allows the nucleus to transform a neutron into a proton or a proton into a neutron when there is too much abundance of one of them.