Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Scientists provide 'new spin' on emerging quantum technologies

Images illustrate how collective spin excitations behave under the effect of the spin-orbit field, with and without external magnetic field. © 2012 American Physical Society
Images illustrate how collective spin excitations behave under the effect of the spin-orbit field, with and without external magnetic field.

© 2012 American Physical Society

Abstract:
An international team of scientists has shed new light on a fundamental area of physics which could have important implications for future electronic devices and the transfer of information at the quantum level.

Scientists provide 'new spin' on emerging quantum technologies

Heslington, UK | Posted on April 23rd, 2013

The electrical currents currently used to power electronic devices are generated by a flow of charges. However, emerging quantum technologies such as spin-electronics, make use of both charge and another intrinsic property of electrons - their spin - to transfer and process signals and information.

The experimental and theoretical work, carried out by researchers from York's Department of Physics, the Institute of Nanoscience in Paris and the University of Missouri-Columbia, USA, could have important implications for spintronics and quantum information technologies.

The team looked at semiconductors' structures - the base of current electronic devices and of many spintronic device proposals - and the problems created by internal fields known as spin-orbit fields. In general, these tend to act differently on each electronic spin, causing a phenomenon referred to as 'spin-decoherence'. This means that the electronic spins will behave in a way which cannot be completely controlled or predicted, which has important implications for device functionalities.

To address this problem, the scientists looked at semiconductor structures called 'quantum wells' where the spins can be excited in a collective, coherent way by using lasers and light scattering.

They demonstrated that these collective spin excitations possess a macroscopic spin of quantum nature. In other words, the electrons and their spins act as a single entity making them less susceptible to spin orbit fields, so decoherence is highly suppressed.

The theoretical work was led by Dr Irene D'Amico from York's Department of Physics, and Carsten Ullrich, an Associate Professor from Missouri-Columbia's

Department of Physics. The project began with their prediction about the effect of spin Coulomb drag on collective spin excitations, and developed into a much larger international project spanning over three years, which was funded in the UK by a Royal Society grant, with additional funding from the Engineering and Physical Sciences Research Council (EPSRC).

Dr D'Amico said: "This work has developed into a strong international collaboration which has greatly improved our understanding at fundamental level of the role of many-body interactions on the behaviour of electron spins.

"By combining experimental and theoretical work, we were able to demonstrate that through many-body interactions, a macroscopic collection of spins can behave as a single entity with a single macroscopic quantum spin, making this much less susceptible to decoherence. In the future, it may be possible to use these excitations as signals to transport or elaborate information at the quantum level."

After reporting their results in the journal Physical Review Letters last year, the team of scientists confirmed and extended the results by considering different materials and type of excitation. The second set of experiments, were recently reported in Physical Review B (Rapid Communication) and highlighted by the Journal as an 'Editor's Suggestion'.

Dr Florent Perez, who led the experimental work with Florent Baboux, at the CNRS/Université Paris VI, says the results strongly suggest that the quantum nature of the macroscopic spin is universal to collective spin excitations in conductive systems.

He said: "The collaboration with Irene D'Amico and Carsten Ullrich has been particularly powerful to disentangle the puzzle of our data. In our first joint work we constructed an interpretation of the phenomenon which was confirmed in a second investigation carried out on a different system. This paved the way for a universality of the effect."

####

For more information, please click here

Contacts:
Caron Lett

44-019-043-22029

Copyright © University of York

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 News Press

News and information

Tiny sensor lays groundwork for precision X-rays detection via endoscopy:Nanoscale fiber-integrated X-ray sensor opens new doors for medical imaging and radiotherapy March 29th, 2017

Researchers uncover secret of nanomaterial that makes harvesting sunlight easier March 29th, 2017

Information storage with a nanoscale twist: Discovery of a novel rotational force inside magnetic vortices makes it easier to design ultrahigh capacity disk drives March 28th, 2017

A big leap toward tinier lines: Self-assembly technique could lead to long-awaited, simple method for making smaller microchip patterns March 27th, 2017

Govt.-Legislation/Regulation/Funding/Policy

A big leap toward tinier lines: Self-assembly technique could lead to long-awaited, simple method for making smaller microchip patterns March 27th, 2017

Laser activated gold pyramids could deliver drugs, DNA into cells without harm: Microstructures create temporary pores in cells March 27th, 2017

Cryo-electron microscopy achieves unprecedented resolution using new computational methods March 25th, 2017

Argon is not the 'dope' for metallic hydrogen March 24th, 2017

Spintronics

Smart multi-layered magnetic material acts as an electric switch: New study reveals characteristic of islands of magnetic metals between vacuum gaps, displaying tunnelling electric current March 1st, 2017

First experimental proof of a 70 year old physics theory: First observation of magnetic phase transition in 2-D materials, as predicted by the Nobel winner Onsager in 1943 January 6th, 2017

Investigations of the skyrmion Hall effect reveal surprising results: One step further towards the application of skyrmions in spintronic devices December 28th, 2016

Electron highway inside crystal December 12th, 2016

Chip Technology

A big leap toward tinier lines: Self-assembly technique could lead to long-awaited, simple method for making smaller microchip patterns March 27th, 2017

ATTOPSEMI Technology Joins FDXcelerator Program to Deliver Advanced Non-Volatile Memory IP to GLOBALFOUNDRIES 22 FDX® Technology Platform: Leading-edge I-fuse™ brings higher reliability, smaller cell size and ease of programmability for consumer, automotive, and IoT applications March 27th, 2017

Argon is not the 'dope' for metallic hydrogen March 24th, 2017

Scientists discover new 'boat' form of promising semiconductor: GeSe Uncommon form attenuates semiconductor's band gap size March 23rd, 2017

Quantum Computing

Harris & Harris Group Issues Its Financial Statements as of December 31, 2016, Posts Its Annual Shareholder Letter, And Will Host a Conference Call for Shareholders on Friday, March 17, 2017 March 15th, 2017

Sorting machine for atoms:Researchers at the University of Bonn clear a further hurdle on the path to creating quantum computers February 10th, 2017

First ever blueprint unveiled to construct a large scale quantum computer February 3rd, 2017

Chiral quantum optics: A new research field with bright perspectives January 31st, 2017

Discoveries

Tiny sensor lays groundwork for precision X-rays detection via endoscopy:Nanoscale fiber-integrated X-ray sensor opens new doors for medical imaging and radiotherapy March 29th, 2017

Researchers uncover secret of nanomaterial that makes harvesting sunlight easier March 29th, 2017

Information storage with a nanoscale twist: Discovery of a novel rotational force inside magnetic vortices makes it easier to design ultrahigh capacity disk drives March 28th, 2017

A big leap toward tinier lines: Self-assembly technique could lead to long-awaited, simple method for making smaller microchip patterns March 27th, 2017

Announcements

Tiny sensor lays groundwork for precision X-rays detection via endoscopy:Nanoscale fiber-integrated X-ray sensor opens new doors for medical imaging and radiotherapy March 29th, 2017

Researchers uncover secret of nanomaterial that makes harvesting sunlight easier March 29th, 2017

Information storage with a nanoscale twist: Discovery of a novel rotational force inside magnetic vortices makes it easier to design ultrahigh capacity disk drives March 28th, 2017

ATTOPSEMI Technology Joins FDXcelerator Program to Deliver Advanced Non-Volatile Memory IP to GLOBALFOUNDRIES 22 FDX® Technology Platform: Leading-edge I-fuse™ brings higher reliability, smaller cell size and ease of programmability for consumer, automotive, and IoT applications March 27th, 2017

Quantum nanoscience

The speed limit for intra-chip communications in microprocessors of the future January 23rd, 2017

First experimental proof of a 70 year old physics theory: First observation of magnetic phase transition in 2-D materials, as predicted by the Nobel winner Onsager in 1943 January 6th, 2017

Quantum simulation technique yields topological soliton state in SSH model January 3rd, 2017

Diamonds are technologists' best friends: Researchers from the Lomonosov Moscow State University have grown needle- and thread-like diamonds and studied their useful properties December 30th, 2016

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



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project