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A Direct Look at Graphene

Berkeley Lab researchers have recorded the first direct observations at microscopic lengths of how electrons and holes respond to a charged impurity in graphene. The results point to interactions between electrons as being critical to graphene’s extraordinary properties.

Beyond the High-Speed Hard Drive: Topological Insulators Open a Path to Room-Temperature Spintronics

Berkeley Lab theorists and experimenters have led in the exploration of the unique properties of topological insulators, where electrons may flow on the surface without resistance and with their spin orientations and directions intimately related. Recent research at beamline 12.0.1 of the Advanced Light Source opens the way to exciting prospects for practical new spintronic devices that exploit control of electron spin as well as charge.

Better Organic Electronics

At Berkeley Lab’s Molecular Foundry, scientists have provided the first experimental determination of the pathways by which electrical charge is transported from molecule-to-molecule in an organic thin film. These results also show how such organic films can be chemically modified to improve conductance for superior organic electronics.

Solving a Spintronic Mystery:

A collaboration of Berkeley Lab and Notre Dame researchers appear to have resolved a long-standing controversy regarding the semiconductor gallium manganese arsenide, one of the most promising materials for spintronic technology. They’ve determined the source of the ferromagnetic properties that make gallium manganese arsenide such a hot commodity.

New Path to Flex and Stretch Electronics

Berkeley Lab researchers have developed a promising new inexpensive technique for fabricating large-scale flexible and stretchable backplanes using semiconductor-enriched carbon nanotube solutions. To demonstrate the utility of their carbon nanotube backplanes, the researchers constructed an artificial electronic skin device capable of detecting and responding to touch.

Partnership for Progress in Electronics Strengthened by New Lab-Industry Investment

Through the Center for X-Ray Optics, Berkeley Lab and leading semiconductor manufacturers have mutually invested in major new facilities at the Advanced Light Source for advanced extreme-ultraviolet lithography, including clean rooms, wafer processing facilities, and microlithography test tools too costly for individual manufacturers.

A SHARP New Microscope for the Next Generation of Microchips

Scientists at Berkeley Lab’s Advanced Light Source and Center for X-Ray Optics are working with colleagues at leading semiconductor manufacturers to build SHARP, the world’s most advanced extreme-ultraviolet-light microscope, to study and design the photolithography masks, materials, patterns, and mask architectures essential to producing the next generation of integrated circuits.

An Electronic Bucket Brigade Could Boost Solar Cell Voltages

Some ferroelectric materials can develop extremely high voltages when light falls on them, which might greatly improve solar cells if scientists could figure out how they do it. Researchers at Lawrence Berkeley National Laboratory have solved the mystery for one ferroelectric, bismuth ferrite, revealing a principle that should apply to other materials too. The secret is an electronic “bucket brigade” that passes electrons stepwise from one electrically polarized region to the next.

Berkeley Lab Scientists Unveil an X-ray Technique Called HARPES

Berkeley Lab researchers led the development of a technique called HARPES, for Hard x-ray Angle-Resolved PhotoEmission Spectroscopy, that enables the study of electronic structures deep below material surfaces, including the buried layers and interfaces in nanoscale devices. This could pave the way for smaller logic elements in electronics, novel memory architectures in spintronics, and more efficient energy conversion in photovoltaic cells.

A Manganite Changes its Stripes

Manganites that exhibit colossal magnetoresistance and well-known high-temperature superconductors are among the materials that show their stripes – regions where electrical charges concentrate. Until now, only static stripes have been seen. At the Advanced Light Source’s beamline 12.0.1, scientists have discovered a manganite whose stripes form or fall apart depending on the temperature, simultaneously giving rise to colossal changes in electrical conductivity.