A research group led by Dr. Takashi Uchihashi, a MANA Scientist, and Dr. Tomonobu Nakayama, a MANA Principal Investigator, both of the International Center for Materials Nanoarchitectonics (MANA; Director-General: Masakazu Aono), National Institute for Materials Science (President: Sukekatsu Ushioda), demonstrated that a substance comprising a metal single atomic layer on a silicon surface becomes free of electrical resistance by superconductivity.
The current mainstream integrated circuits using semiconductor devices generate excessive heat during operation, and this is a serious problem from the viewpoints of energy saving and environmental protection. Logic elements using superconductors have attracted attention as an effective candidate which offers a fundamental solution to this problem. On the other hand, research on quantum information communication using single photon detectors employing superconducting devices is also progressing as a means of communication which assures perfect information security. As issues for future practical application, it is necessary to realize high integration and high efficiency, etc. in these respective devices. Refinement and creation of thin films of superconducting materials are considered effective for this purpose.
Focusing on an indium single atomic layer arranged with a special structure on a silicon surface, the team led by Dr. Uchihashi observed for the first time in the world that the electrical resistance of this substance become zero, and the substance displays superconductivity, when cooled to a low temperature. Furthermore, when the current passing through this substance was increased, it was possible to pass a large current of 6.1ã109 A/m2 (current density) at maximum. Based on the principle of superconductivity, it had been anticipated that a superconducting current (=current with zero resistance) would be difficult to pass through the extremely confined and disordered region at the surface of a solid. However, this research overturned that prospect.
This research clarified the fact that the thickness of superconducting materials can be reduced to the ultimate limit of the atomic level. It is considered that this achievement will accelerate research on further refinement/integration of superconducting logic elements and research on higher efficiency/higher speed in superconducting detectors.
These research results are scheduled for publication in the near future as an Editorfs Suggestion in the journal of the American Institute of Physics, Physical Review Letters.
Robust and functional – surface finishing by suspension spraying
19.09.2017 | Fraunhofer-Institut für Keramische Technologien und Systeme IKTS
Graphene and other carbon nanomaterials can replace scarce metals
19.09.2017 | Chalmers University of Technology
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.
Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...
MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems Holding GmbH about commercial use of a multi-well tissue plate for automated and reliable tissue engineering & drug testing.
MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems...
Pathogenic bacteria are becoming resistant to common antibiotics to an ever increasing degree. One of the most difficult germs is Pseudomonas aeruginosa, a...
19.09.2017 | Event News
12.09.2017 | Event News
06.09.2017 | Event News
20.09.2017 | Life Sciences
20.09.2017 | Power and Electrical Engineering
20.09.2017 | Physics and Astronomy