Turning a brittle oxide into a flexible membrane and stretching it on a tiny apparatus flipped it from a conducting to an insulating state and changed its magnetic properties. The technique can be used to study and design a broad range of materials for use in things like sensors and detectors.
At the BESSY II storage ring, a team has shown how the helicity of circularly polarized synchrotron radiation can be switched faster - up to a million times faster than before. They used an elliptical double-undulator developed at HZB and operated the storage ring in the so-called two-orbit mode. This is a special mode of operation that was only recently developed at BESSY II and provides the basis for fast switching.
Scientists studying high-Tc superconductors at the US Department of Energy's Brookhaven National Laboratory have definitive evidence for the existence of a state of matter known as a pair density wave -- first predicted by theorists some 50 years ago. Their results show that this phase coexists with superconductivity in a well-known bismuth-based copper-oxide superconductor.
Recently, Wang Jian group at Peking University, in collaboration with Professor Wang Ziqiang at Boston College and Professor Hu Jiangping at Institute of Physics, Chinese Academy of Sciences, detected novel ZEBSs resembling the characteristics of MZMs in interstitial Fe adatoms deposited on the high-temperature superconducting thin films at two-dimensional limit.
Scientists at the Okinawa Institute of Science and Technology Graduate University (OIST) have explored how an excited state of matter -- excitons -- behaves in phosphorene, a two-dimensional material that could be used in LEDs, solar cells, and other optoelectronic devices. The researchers found that they can control whether excitons interact in one or two dimensions within phosphorene, enhancing its prospects as a new material in optoelectronic devices.
Transistors work electrically, but data can be transmitted more quickly by using light. Scientists from Forschungszentrum Jülich have now come a step closer to integrating lasers directly in silicon chips. Together with researchers from Centre de Nanosciences et de Nanotechnologies in Paris and the French company STMicroelectronics as well as CEA-LETI Grenoble, they have developed a compatible semiconductor laser made of germanium and tin, whose efficiency is comparable with conventional GaAs semiconductor lasers on Si.
Clemson professor Sourav Saha demonstrated a novel double-helical metal organic framework architecture in a partially oxidized form that conducts electricity, potentially making it a next-generation semiconductor.
Tiny particles composed of metals and semiconductors could serve as light sources in components of future optical computers, as they are able to precisely localize and extremely amplify incident laser light. A team from Germany and Sweden led by Prof. Dr. Christoph Lienau and Dr. Jin-Hui Zhong from the University of Oldenburg has now explained for the first time how this process works. The study is published in the current issue of the journal Nature Communications.
An Australian-German collaboration has demonstrated fully-autonomous SPM operation, applying artificial intelligence and deep learning to remove the need for constant human supervision. The new system, dubbed DeepSPM, bridges the gap between nanoscience, automation and artificial intelligence (AI), and firmly establishes the use of machine learning for experimental scientific research using Scanning Probe Microscopy (SPM).
The crystal structure at the surface of semiconductor materials can make them behave like metals and even like superconductors, a joint Swansea/Rostock research team has shown. The discovery potentially opens the door to advances like more energy-efficient electronic devices.