Physics

Seeing the next dimension of computer chips

Researchers used a scanning tunneling microscope to image the side-surfaces of 3-D silicon crystals for the first time. The pictures, captured with atomic-level of resolution, can help semiconductor manufacturers build the next generation of computer chips with three-dimensional features.

NASA to Televise International Space Station Cargo Ship Launch, Docking

NASA Television will provide live coverage of the launch and docking of a Russian cargo spacecraft delivering almost three tons of food, fuel and supplies to the International Space Station beginning at 5:15 a.m. EDT Thursday, Oct. 12.

JILA spinning method confirms the electron still seems round

JILA physicists have for the first time used their spinning molecules technique to measure the "roundness" of the electron, confirming the leading results from another group and suggesting that more precise assessments are possible.

Novel circuit design boosts wearable thermoelectric generators

Using flexible conducting polymers and novel circuitry patterns printed on paper, researchers have demonstrated proof-of-concept wearable thermoelectric generators that can harvest energy from body heat to power simple biosensors for measuring heart rate, respiration or other factors.

Researchers make progress toward solving the proton spin puzzle

Scientists in a research group led by Constantia Alexandrou, professor of physics at the University of Cyprus and the Cyprus Institute, made a crucial step towards solving a three-decades-old puzzle: They have successfully deciphered the total angular momentum (spin) of the nucleon, determining how it's shared among its constituents. CSCS supercomputer Piz Daint provided the necessary computational resources.

Invisibility is within sight

The theoretical discovery of transparent particles that break the previously accepted limit of visibility opens a new door in the search for perfect transparency, report scientists.

A zero-index waveguide

In 2015, researchers developed the first on-chip metamaterial with a refractive index of zero, meaning that the phase of light could be stretched infinitely long. The metamaterial represented a new method to manipulate light and was an important step forward for integrated photonic circuits. Now, researchers have developed a zero-index waveguide compatible with current silicon photonic technologies. In doing so, the team observed a physical phenomenon that is usually unobservable -- a standing wave of light.

Solar energy: Prototype shows how tiny photodetectors can double their efficiency

Physicists have developed a photodetector -- a device that converts light into electrons -- by combining two distinct inorganic materials and producing quantum mechanical processes that could revolutionize the way solar energy is collected. The researchers stacked two atomic layers of tungsten diselenide on a single atomic layer of molybdenum diselenide. Such stacking results in properties vastly different from those of the parent layers, allowing for customized electronic engineering at the tiniest possible scale.

Scientists address many-electron problem by modeling an infinite chain of hydrogen atoms

(Phys.org)—For the first time, scientists have determined the equation of state of an infinite chain of hydrogen atoms, which tells the amount of energy each hydrogen atom has, given the bond length between adjacent atoms.

ATLAS experiment studies fragments of the top quark

Top quarks in the Large Hadron Collider (LHC) proton-proton collisions are predominantly produced in pairs, with one top quark and one top antiquark. In order to measure the production rates of top quark pairs, the ATLAS Experiment examined events with an electron, muon, and one or two jets that were likely to have originated from bottom quarks. By comparing the number of events with one bottom-quark jet to those with two bottom-quark jets, ATLAS was able to determine both the total production rate, as well as the efficiency of identifying bottom-flavoured jets.

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