Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Diamonds show promise for spintronic devices: New experiments demonstrate the potential for diamond as a material for spintronics

Diamond plates undergoing surface termination treatment in a hydrogen plasma.

CREDIT
Daniel Creedon
Diamond plates undergoing surface termination treatment in a hydrogen plasma. CREDIT Daniel Creedon

Abstract:
Conventional electronics rely on controlling electric charge. Recently, researchers have been exploring the potential for a new technology, called spintronics, that relies on detecting and controlling a particle's spin. This technology could lead to new types of more efficient and powerful devices.

Diamonds show promise for spintronic devices: New experiments demonstrate the potential for diamond as a material for spintronics

Washington, DC | Posted on January 30th, 2018

In a paper published in Applied Physics Letters, from AIP Publishing, researchers measured how strongly a charge carrier's spin interacts with a magnetic field in diamond. This crucial property shows diamond as a promising material for spintronic devices.

Diamond is attractive because it would be easier to process and fabricate into spintronic devices than typical semiconductor materials, said Golrokh Akhgar, a physicist at La Trobe University in Australia. Conventional quantum devices are based on multiple thin layers of semiconductors, which require an elaborate fabrication process in an ultrahigh vacuum.

"Diamond is normally an extremely good insulator," Akhgar said. But, when exposed to hydrogen plasma, the diamond incorporates hydrogen atoms into its surface. When a hydrogenated diamond is introduced to moist air, it becomes electrically conductive because a thin layer of water forms on its surface, pulling electrons from the diamond. The missing electrons at the diamond surface behave like positively charged particles, called holes, making the surface conductive.

Researchers found that these holes have many of the right properties for spintronics. The most important property is a relativistic effect called spin-orbit coupling, where the spin of a charge carrier interacts with its orbital motion. A strong coupling enables researchers to control the particle's spin with an electric field.

In previous work, the researchers measured how strongly a hole's spin-orbit coupling could be engineered with an electric field. They also showed that an external electric field could tune the strength of the coupling.

In recent experiments, the researchers measured how strongly a hole's spin interacts with a magnetic field. For this measurement, the researchers applied constant magnetic fields of different strengths parallel to the diamond surface at temperatures below 4 Kelvin. They also simultaneously applied a steadily varying perpendicular field. By monitoring how the electrical resistance of the diamond changed, they determined the g-factor. This quantity could help researchers control spin in future devices using a magnetic field.

"The coupling strength of carrier spins to electric and magnetic fields lies at the heart of spintronics," Akhgar said. "We now have the two crucial parameters for the manipulation of spins in the conductive surface layer of diamond by either electric or magnetic fields."

Additionally, diamond is transparent, so it can be incorporated into optical devices that operate with visible or ultraviolet light. Nitrogen-vacancy diamonds -- which contain nitrogen atoms paired with missing carbon atoms in its crystal structure -- show promise as a quantum bit, or qubit, the basis for quantum information technology. Being able to manipulate spin and use it as a qubit could lead to yet more devices with untapped potential, Akhgar said.

####

For more information, please click here

Contacts:
Julia Majors

301-209-3090

Copyright © American Institute of Physics

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

The article, "G-factor and well width variations for the two-dimensional hole gas in surface conducting diamond," is authored by Golrokh Akhgar, Daniel L. Creedon, Alastair Stacey, David Hoxley, Jeffrey C. McCallum, Lothar Ley, Alex R. Hamilton and Chris Pakes. The article appeared in Applied Physics Letters Jan. 23, 2018 (DOI: 10.1063/1.5010800) and can be accessed at:

Related News Press

2 Dimensional Materials

Flipping the switch on supramolecular electronics August 14th, 2018

News and information

Flipping the switch on supramolecular electronics August 14th, 2018

New technology can detect hundreds of proteins in a single sample: Improvement of barcoding technique offers cost-effective alternative to current technology August 13th, 2018

Biomimetic micro/nanoscale fiber reinforced composites August 10th, 2018

Breaking down the Wiedemann-Franz law: In a study exploring the coupling between heat and particle currents in a gas of strongly interacting atoms, physicists at ETH Zurich find puzzling behaviours August 10th, 2018

Possible Futures

New technology can detect hundreds of proteins in a single sample: Improvement of barcoding technique offers cost-effective alternative to current technology August 13th, 2018

Amazingly 'green' synthesis method for high-tech dyes: Dyes that are also of great interest for organic electronics have recently been prepared and crystallised at TU Wien. All that is required is just water, albeit under highly unusual conditions. August 10th, 2018

Superconductivity above 10 K discovered in a novel quasi-one-dimensional compound K2Mo3As3 August 10th, 2018

Biomimetic micro/nanoscale fiber reinforced composites August 10th, 2018

Spintronics

A colossal breakthrough for topological spintronics: BiSb expands the potential of topological insulators for ultra-low-power electronic devices August 2nd, 2018

Researchers from TU Delft combine spintronics and nanophotonics in 2-D material January 25th, 2018

ICN2 researchers compute unprecedented values for spin lifetime anisotropy in graphene November 17th, 2017

Spin current detection in quantum materials unlocks potential for alternative electronics October 15th, 2017

Chip Technology

Flipping the switch on supramolecular electronics August 14th, 2018

Breaking down the Wiedemann-Franz law: In a study exploring the coupling between heat and particle currents in a gas of strongly interacting atoms, physicists at ETH Zurich find puzzling behaviours August 10th, 2018

Scientists squeeze nanocrystals in a liquid droplet into a solid-like state and back again: Simple chemical technique transforms crystal mixture where 2 liquids meet August 9th, 2018

Quantum chains in graphene nanoribbons: Breakthrough in nanoresearch August 9th, 2018

Quantum Computing

Quantum chains in graphene nanoribbons: Breakthrough in nanoresearch August 9th, 2018

World-first quantum computer simulation of chemical bonds using trapped ions: Quantum chemistry expected to be one of the first applications of full-scale quantum computers July 25th, 2018

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern July 21st, 2018

Tuning into quantum: Scientists unlock signal frequency control of precision atom qubits July 16th, 2018

Discoveries

Flipping the switch on supramolecular electronics August 14th, 2018

New technology can detect hundreds of proteins in a single sample: Improvement of barcoding technique offers cost-effective alternative to current technology August 13th, 2018

Biomimetic micro/nanoscale fiber reinforced composites August 10th, 2018

Breaking down the Wiedemann-Franz law: In a study exploring the coupling between heat and particle currents in a gas of strongly interacting atoms, physicists at ETH Zurich find puzzling behaviours August 10th, 2018

Materials/Metamaterials

Flipping the switch on supramolecular electronics August 14th, 2018

Biomimetic micro/nanoscale fiber reinforced composites August 10th, 2018

Yale-NUS scientist and collaborators solve open theoretical problem on electron interactions August 10th, 2018

Quantum chains in graphene nanoribbons: Breakthrough in nanoresearch August 9th, 2018

Announcements

Flipping the switch on supramolecular electronics August 14th, 2018

New technology can detect hundreds of proteins in a single sample: Improvement of barcoding technique offers cost-effective alternative to current technology August 13th, 2018

Biomimetic micro/nanoscale fiber reinforced composites August 10th, 2018

Breaking down the Wiedemann-Franz law: In a study exploring the coupling between heat and particle currents in a gas of strongly interacting atoms, physicists at ETH Zurich find puzzling behaviours August 10th, 2018

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

New technology can detect hundreds of proteins in a single sample: Improvement of barcoding technique offers cost-effective alternative to current technology August 13th, 2018

Superconductivity above 10 K discovered in a novel quasi-one-dimensional compound K2Mo3As3 August 10th, 2018

Biomimetic micro/nanoscale fiber reinforced composites August 10th, 2018

Breaking down the Wiedemann-Franz law: In a study exploring the coupling between heat and particle currents in a gas of strongly interacting atoms, physicists at ETH Zurich find puzzling behaviours August 10th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project