Featured Research

from universities, journals, and other organizations

Quest for quantum computing advanced

Date:
May 23, 2013
Source:
University of York
Summary:
Scientistst investigating the properties of ultra-thin films of new materials are helping bring quantum computing one step closer to reality.

Research teams from UW-Milwaukee and the University of York investigating the properties of ultra-thin films of new materials are helping bring quantum computing one step closer to reality.

An on-going collaboration between physicists from York and the University of Wisconsin, Milwaukee, USA, is focusing on understanding, tailoring and tuning the electronic properties of topological insulators (TI) - new materials with surfaces that host a quantum state of matter – at the nanoscale.

Understanding the properties of thin films of the new materials and integrating them with semiconductors is an important step in creating a materials platform for quantum computers.

Professor Lian Li, from UW-Milwaukee, said: “The electrons on the surface of this material have some intriguing properties. All electrons are spinning in a quantum mechanical way, and spins are constantly knocked by random collisions (scattering).

“But on the surface of a topological insulator spinning electrons are protected from disruption by quantum effects, called time-reversal symmetry protection. This makes the materials attractive for spin-related electronics, or ‘spintronics’, which would use the orientation of the electron spin to encode information.

“In this work, we wanted to investigate if these properties of surface electrons are indeed ‘protected’ from scattering off of imperfections such as grain boundaries, a type of native and commonly found defect in the thin films made by nano size films growth techniques. And we found that these properties, although slightly modified, are indeed robust against such scattering effects.”

Results of the team’s latest research, which shows that the unique properties of a TI can be modified by intrinsic defects present in Bi2Se3films when grown on graphene/silicon carbide (SiC), were featured on the front cover of a recent issue of the journalPhysical Review Letters.

Dr Vlado Lazarov, from York’s Department of Physics, said: “Topological insulators are like no other material we have seen before and can host completely new physics. Their surfaces are unique charge and spin conductors, with no dissipation. The perfectly aligned spin currents make topological insulators a prime platform for spintronics, a research field that is already revolutionising magnetic data storage.

“The challenge is to keep these properties at the microscopic scale so that they can be applied to quantum computing. We are exploring the properties of thin films, and questions such as whether inherent defects enhance or modify the materials’ properties. We need to understand how to engineer these defects so that we can control the electronic properties of topological insulators if the dream of quantum computing is to become a reality.”

The York physicists carried out atomistic studies at the York JEOL Nanocentre at the University of York, a world-class research and teaching facility. The research was supported by the National Science Foundation, USA.


Story Source:

The above story is based on materials provided by University of York. Note: Materials may be edited for content and length.


Journal Reference:

  1. Y. Liu, Y. Y. Li, D. Gilks, V. K. Lazarov, M. Weinert, L. Li. Charging Dirac States at Antiphase Domain Boundaries in the Three-Dimensional Topological Insulator Bi_{2}Se_{3}. Physical Review Letters, 2013; 110 (18) DOI: 10.1103/PhysRevLett.110.186804

Cite This Page:

University of York. "Quest for quantum computing advanced." ScienceDaily. ScienceDaily, 23 May 2013. <www.sciencedaily.com/releases/2013/05/130523082923.htm>.
University of York. (2013, May 23). Quest for quantum computing advanced. ScienceDaily. Retrieved April 18, 2014 from www.sciencedaily.com/releases/2013/05/130523082923.htm
University of York. "Quest for quantum computing advanced." ScienceDaily. www.sciencedaily.com/releases/2013/05/130523082923.htm (accessed April 18, 2014).

Share This



More Matter & Energy News

Friday, April 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Small Reactors Could Be Future of Nuclear Energy

Small Reactors Could Be Future of Nuclear Energy

AP (Apr. 17, 2014) After the Fukushima nuclear disaster, the industry fell under intense scrutiny. Now, small underground nuclear power plants are being considered as the possible future of the nuclear energy. (April 17) Video provided by AP
Powered by NewsLook.com
Honda's New ASIMO Robot, More Human-Like Than Ever

Honda's New ASIMO Robot, More Human-Like Than Ever

AFP (Apr. 17, 2014) It walks and runs, even up and down stairs. It can open a bottle and serve a drink, and politely tries to shake hands with a stranger. Meet the latest ASIMO, Honda's humanoid robot. Duration: 00:54 Video provided by AFP
Powered by NewsLook.com
German Researchers Crack Samsung's Fingerprint Scanner

German Researchers Crack Samsung's Fingerprint Scanner

Newsy (Apr. 16, 2014) German researchers have used a fake fingerprint made from glue to bypass the fingerprint security system on Samsung's new Galaxy S5 smartphone. Video provided by Newsy
Powered by NewsLook.com
Porsche CEO Says Supercar Is Not Dead: Cue the Spyder 918

Porsche CEO Says Supercar Is Not Dead: Cue the Spyder 918

TheStreet (Apr. 16, 2014) The Porsche Spyder 918 proves that, in an automotive world obsessed with fuel efficiency, the supercar is not dead. Porsche North America CEO Detlev von Platen attributes the brand's consistent sales growth -- 21% in 2013 -- with an investment in new technology and expanded performance dynamics. The hybrid Spyder 918 has 887 horsepower and 944 lb-ft of torque, but it can run 18 miles on just an electric charge. The $845,000 vehicle is not a consumer-targeted vehicle but a brand statement. Video provided by TheStreet
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins