Berry curvature may not be the most well-known scientific concept, but to many physicists, its direct measurement is something akin to a holy grail.
A powerful unifying principle in several branches of classical and quantum physics, Berry curvature is a strange and elusive quantum mechanical property of solids. It governs the dynamics of the motion of charges in semiconductors yet itself cannot be directly measured.
If it could be, the resulting calculation could lead to new materials for quantum computing.
Using a newly developed technique, researchers from Japan, Germany and the U.S. have identified a key step in production of hydrogen gas by a bacterial enzyme. Understanding these reactions could be important in developing a clean-fuel economy powered by hydrogen.
The team studied hydrogenases - enzymes that catalyze production of hydrogen from two widely distributed organisms: Chlamydomonas reinhardtii, a single-cell algae and Desulfovibrio desulfuricans, a bacterium.
In both cases, their hydrogenase enzymes have an active site with two iron atoms.
A Japanese research group has revealed that elderly people with mild cognitive impairment (MCI) have a particularly weakened ability to memorize human faces in the short term when compared to healthy elderly people. MCI patients also had a different gaze behavior when trying to memorize a face. This research may lead to the early detection of dementia.
A major study looking at changes in where UK birds have been found over the past 40 years has validated the latest climate change models being used to forecast impacts on birds and other animals.
Led by the University of Adelaide, in collaboration with an international team of researchers, the scientists compared forecasts from ecological models with observed changes to the bird populations - and found the latest models were working well.
Large, physically strong Masu salmon disperse farther when infected with parasites, potentially escaping from further infections at the contaminated site but ironically resulting in the greater expansion of the parasite, according to Hokkaido University researchers.
Nature itself can be the best defense against climate change for many species -- at least in the short term -- according to a study published in the journal Ecology Letters from the University of California, Davis.
University of Delaware professor Patrick Gaffney and alumnus Keith Bayha, a research associate with the Smithsonian's National Museum of Natural History, have determined that a common sea nettle jellyfish is actually two distinct species.
The Atlantic sea nettle is one of the most common and well known jellyfish along the U.S. East Coast, especially in the Chesapeake Bay and Rehoboth Bay where they commonly sting swimmers in large numbers. Since it was described nearly 175 years ago, the jellyfish has been assumed to be a single species.
The number of people being diagnosed with heart failure in the UK continues to rise as a result of demographic changes common to many developed countries, new research by The George Institute for Global Health at the University of Oxford suggests.
There are now as many new cases of heart failure each year as there are of the four most common cancers combined (lung, breast, bowel and prostate cancer), and people in the most deprived socio-economic groups are about 60% more likely to be affected by the condition, the research found.
Picture a grasshopper landing randomly on a lawn of fixed area. If it then jumps a certain distance in a random direction, what shape should the lawn be to maximise the chance that the grasshopper stays on the lawn after jumping?
Innovative technologies developed by researchers at the U.S. Department of Energy's (DOE) Argonne National Laboratory recently earned multiple R&D 100 Awards.
The prestigious annual competition -- sponsored by R&D Magazine and recognizing the 100 most innovative technologies of the past year -- is widely considered the "Oscars" of innovation. The magazine named 169 finalists in August, with the 100 winners announced November 17 at the 2017 R&D 100 Awards and Technology Conference in Orlando.