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Research Highlights

Published: Tue, 06/20/2017 - 3:15pm

The Kapteyn-Murnane group has come up with a novel way to use fast bursts of extreme ultraviolet light to capture how strongly electrons interact with each other in materials. This research is important for figuring out how quickly materials can change their state from insulating to conducting, or from magnetic to nonmagnetic. In the future such fast switching may lead to faster and more efficient nanoelectronics.

In this work, graduate student Cong Chen, research associate Zhensheng Tao, and their colleagues used sequences of attosecond (10-18 s) bursts of extreme ultraviolet light to compare how long it took an electron to be emitted from the same energy levels, or bands, in two different metals––copper (Cu) and nickel (Ni).

In the past, scientists thought that the photoelectric effect, in which a high-energy photon kicks out an electron from a material, was instantaneous. More recently, with the advent of shorter and shorter laser pulses, scientists have been able to investigate such super-fast processes directly. And, they have discovered many surprises. In Chen’s and Tao’s work, the researchers...

Published: May 11, 2015

A wildly successful JILA (Nesbitt Group)-NIH collaboration is opening the door to studies of RNA...

Published: Apr 30, 2015

For decades after the invention of the red ruby laser in 1960, bright laser-like beams were...

Published: Apr 21, 2015

The Ye group has just improved the accuracy of the world’s best optical atomic clock by another...

Published: Apr 20, 2015

The Ye Group recently investigated what first appeared to be a “bug” in an experiment and made...

Published: Mar 23, 2015

One of the great challenges in the semiconductor and electronics industries is that as nanoscale...

Published: Mar 11, 2015

Supermassive black holes at the center of active galaxies are known as blazars when they are...

Published: Mar 02, 2015

The photoelectric effect has been well known since the publication of Albert Einstein’s 1905...

Published: Feb 27, 2015

When the Rey theory group first modeled a quantum system at JILA, it investigated the...

Published: Jan 20, 2015

Because red fluorescent proteins are important tools for cellular imaging, the Jimenez group is...

Published: Dec 10, 2014

Until recently, researchers who wanted to understand how magnetic materials work had to reserve...

Published: Oct 31, 2014

New theory describing the spin behavior of ultracold polar molecules is opening the door to...

Published: Oct 14, 2014

Dynamical phase transitions in the quantum world are wildly noisy and chaotic. They don’t look...

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