Category Physics

Physicists uncover new Competing state of matter in Superconducting material

Ames Laboratory researchers used laser pulses of less than a trillionth of a second in much the same way as flash photography, in order to take a series of snapshots. Called terahertz spectroscopy, this technique can be thought of as “laser strobe photography” where many quick images reveal the subtle movement of electron pairings inside the materials using long wavelength far-infrared light.
Credit: US Department of Energy, Ames Laboratory

A team of experimentalists at the U.S. Department of Energy’s Ames Laboratory and theoreticians at University of Alabama Birmingham discovered a remarkably long-lived new state of matter in an iron pnictide superconductor, which reveals a laser-induced formation of collective behaviors that compete with superconductivity.

“Superconductivity is a str...

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Next up: Ultracold Simulators of Super-Dense Stars

Rice University graduate student Tom Langin makes an adjustment to an experiment that uses 10 lasers of varying wavelengths to laser-cool ions in a neutral plasma.
Credit: Photo by Brandon Martin/Rice University

Rice University physicists have created the world’s first laser-cooled neutral plasma, completing a 20-year quest that sets the stage for simulators that re-create exotic states of matter found inside Jupiter and white dwarf stars. The findings are detailed this week in the journal Science and involve new techniques for laser cooling clouds of rapidly expanding plasma to temperatures about 50 times colder than deep space.

“We don’t know the practical payoff yet, but every time physicists have laser cooled a new kind of thing, it has opened a whole world of possibilities,” said ...

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Self-Powered Microfluidic Sheet that Wraps, Flaps and Creeps

An animation of the unwrapping of a catalse-coated flower-like sheet around a capsule. Black arrows indicate the directionality and magnitude of the flow field in the solution.
Credit: Abhrajit Laskar

Researchers for the first time apply catalytic chemical reactions to 2D sheets to generate flows that transform these sheets into mobile, 3D objects. The “magic carpet” featured in tales from “One Thousand and One Nights” to Disney’s “Aladdin” captures the imagination not only because it can fly, but because it can also wave, flap, and alter its shape to serve its riders...

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Electronics of the future: A New Energy-Efficient Mechanism using the Rashba effect

Spintronics: Spin-based electronics of the future

First-principles prediction of one-dimensional giant Rashba splittings in Bi-adsorbed In atomic chainsPhysical Review B, 2018; 98 (24) DOI: 10.1103/PhysRevB.98.241409

Scientists at Tokyo Institute of Technology proposed new quasi-1D materials for potential spintronic applications, an upcoming technology that exploits the spin of electrons. They performed simulations to demonstrate the spin properties of these materials and explained the mechanisms behind their behavior.

Conventional electronics is based on the movement of electrons and mainly concerns their electric charge; unfortunately, we are close to reaching the physical limits for improving electronic devices...

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