It's the first time the intrinsic properties of a semiconductor—not external electric or magnetic fields–have been used to achieve the effect. The findings, published this week in Nature, could have implications for the development of so called 'spintronic' circuits: systems that use the directional spin of electrons to store and process data.
"The need to use high-frequency external fields to control spin is one of the major stumbling blocks in using electrons for information processing, or in a spintronic circuit," notes Joshua Folk, principal investigator on the project and Canada Research Chair in the Physics of Nanostructures. "We show that the spin of electrons can be controlled without external fields, simply by designing the right circuit geometry and letting electrons move freely through it."
The new technique uses the natural interactions of the electrons within the semiconductor micro-channel to control their spin--a technique that is a major step, but not yet flexible enough for industrial applications, notes Folk, an Assistant Professor with Physics and Astronomy who came to UBC via the Massachusetts Institute of Technology.
Electronic systems that use the spin of an electron--a quantum mechanical property that comes in two varieties: up or down--would work similarly to today's transistors, but be smaller and use less energy.
Presently, electrical charge alone is responsible for the logic functions in circuits. Power consumption by these circuits is the primary roadblock to faster, more powerful processors. A spintronic circuit has the potential to use less power by storing and manipulating a bit of information as electron spin.
Spintronic circuits may also be a viable avenue for building quantum information processing devices. The exponentially faster processing possible with such a device could have applications ranging from code breaking, to dramatically improved drug design, to simulations of complex processes in molecular systems.
Next steps by Folk and his team—working with colleagues at the Universität Regensburg in Germany—will include using new devices to gain more precise control over the alignment and trajectory of the electrons.
Fraunhofer ISE Supports Market Development of Solar Thermal Power Plants in the MENA Region
21.02.2018 | Fraunhofer-Institut für Solare Energiesysteme ISE
New tech for commercial Lithium-ion batteries finds they can be charged 5 times fast
20.02.2018 | University of Warwick
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
21.02.2018 | Life Sciences
21.02.2018 | Life Sciences
21.02.2018 | Materials Sciences