Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International

Wikipedia Affiliate Button

Home > Press > Pb islands in a sea of graphene magnetise the material of the future

In the sea of graphene (over an iridium crystal), electrons' spin-orbit interaction is much lower than that created by intercalating a Pb island.Credit: IMDEA Nanoscience/UAM/ICMM-CSIC/UPV-EHU
In the sea of graphene (over an iridium crystal), electrons' spin-orbit interaction is much lower than that created by intercalating a Pb island.

Credit: IMDEA Nanoscience/UAM/ICMM-CSIC/UPV-EHU

Abstract:
Researchers in Spain have discovered that if lead atoms are intercalated on a graphene sheet, a powerful magnetic field is generated by the interaction of the electrons' spin with their orbital movement. This property could have implications in spintronics, an emerging technology promoted by the European Union to create advanced computational systems.

Pb islands in a sea of graphene magnetise the material of the future

Madrid, Spain | Posted on December 16th, 2014

Graphene is considered the material of the future due to its extraordinary optical and electronic mechanical properties, especially because it conducts electrons very quickly. However, it does not have magnetic properties, and thus no method has been found to manipulate these electrons or any of their properties to use it in new magnetoelectronic devices, although Spanish scientists have come upon a key.

Researchers from IMDEA Nanoscience, the Autonomous University of Madrid, the Madrid Institute of Materials Science (CSIC) and the University of the Basque Country describe in the journal 'Nature Physics' this week how to create a powerful magnetic field using this new material.

The secret is to intercalate atoms or Pb islands below the sea of hexagons of carbon that make up graphene. This produces an enormous interaction between two electron characteristics: their spin - a small 'magnet' linked to their rotation - and their orbit, the movement they follow around the nucleus.

"This spin-orbit interaction is a million times more intense than that inherent to graphene, which is why we obtain revolutions that could have important uses, for example in data storage," explains Rodolfo Miranda, Director of IMDEA Nanoscience and head of the study.

To obtain this effect, the scientists laid a layer of lead on another of graphene, in turn grown over an iridium crystal. In this configuration the lead forms 'islands' below the graphene and the electrons of this two-dimensional material behave as if in the presence of a colossal 80-tesla magnetic field, which facilitates the selective control of the flow of spins.

Traffic control with two lanes

"And, what is most important, under these conditions certain electronic states are topologically protected; in other words, they are immune to defects, impurities or geometric disturbances," continues Miranda, who gives this example: "If we compare it to traffic, in a traditional spintronic material cars circulate along a single-lane road, which make collisions more likely, whilst with this new material we have traffic control with two spatially separate lanes, preventing crashes."

Spintronics is a new technology that uses electrons' magnetic spin to store information bits. It arose with the discovery of giant magnetoresistance, a finding which won Peter Grümberg and Albert Fert the Nobel Prize in Physics in 2007. It is an effect that causes great changes to the electric resistance of fine multi-layer materials and has led to the development of components as varied as the reader heads on hard disks or the sensors in airbags.

The first generation of spintronic or magnetoresistant devices was based on the effect magnetic materials have on electron spin. But a second generation is already up and running, and encompasses this new study, in which electrons' own spin-orbit interaction acts on them as if there were a real external magnetic field, even if there is not.

The use of graphene as an active component in spintronics is one of the fundamental aims of the large European Union project 'Graphene Flagship'. The scientists' final objective is to wilfully control the type of spin the electrons in this new material have in order to apply it to the electronic devices of the future.

Full bibliographic information
Fabian Calleja, Héctor Ochoa, Manuela Garnica, Sara Barja, Juan Jesús Navarro, Andrés Black, Mikhail M. Otrokov, Evgueni V. Chulkov, Andrés Arnau, Amadeo L. Vázquez de Parga, Francisco Guinea, Rodolfo Miranda. "Spatial variation of a giant spin-orbit effect induces electron confinement in graphene on Pb islands". Nature Physics, 15 December 2014.

####

About Plataforma SINC
The Scientific Information and News Service (Servicio de Información y Noticias Científicas - SINC), is a new public and nationwide multimedia scientific news platform supported by an open source software tool based in Spain. The primary objective behind the creation of SINC is to increase the number of high quality scientific news items in the media, as a means of bringing the public closer to science.

For more information, please click here

Contacts:
Para contactar con el investigador:
Rodolfo Miranda. IMDEA Nanociencia

Teléfono: (+34) 91 4976849

SINC Team

Copyright © AlphaGalileo

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

Resistance is utile: Magnetite nanowires with sharp insulating transition: Osaka University-led researchers make ultra-thin nanowires of Fe3O4, with a remarkable 'Verwey transition' from metal to insulator at low temperature -- a highly sought-after property for nanoelectronics July 19th, 2019

Tiny vibration-powered robots are the size of the world's smallest ant July 19th, 2019

A graphene superconductor that plays more than one tune: Researchers at Berkeley Lab have developed a tiny toolkit for scientists to study exotic quantum physics July 19th, 2019

Electronic chip mimics the brain to make memories in a flash: Engineers have mimicked the human brain with an electronic chip that uses light to create and modify memories. July 19th, 2019

The interlayers help perovskite crystallisation for high-performance light-emitting diodes: Unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes July 19th, 2019

Graphene/ Graphite

A graphene superconductor that plays more than one tune: Researchers at Berkeley Lab have developed a tiny toolkit for scientists to study exotic quantum physics July 19th, 2019

Govt.-Legislation/Regulation/Funding/Policy

Limitation exposed in promising quantum computing material: Metallic surfaces no longer protected as topological insulators become thinner July 19th, 2019

Tiny vibration-powered robots are the size of the world's smallest ant July 19th, 2019

A graphene superconductor that plays more than one tune: Researchers at Berkeley Lab have developed a tiny toolkit for scientists to study exotic quantum physics July 19th, 2019

The interlayers help perovskite crystallisation for high-performance light-emitting diodes: Unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes July 19th, 2019

Spintronics

Small currents for big gains in spintronics: A new low-power magnetic switching component could aid spintronic devices June 14th, 2019

Rice U. lab grows stable, ultrathin magnets: Rare iron oxide could be combined with 2D materials for electronic, spintronic devices May 24th, 2019

Let's not make big waves: A team of researchers generates ultra-short spin waves in an astoundingly simple material March 29th, 2019

Spintronics by 'straintronics': Switching superferromagnetism with electric-field induced strain February 15th, 2019

Chip Technology

Limitation exposed in promising quantum computing material: Metallic surfaces no longer protected as topological insulators become thinner July 19th, 2019

Resistance is utile: Magnetite nanowires with sharp insulating transition: Osaka University-led researchers make ultra-thin nanowires of Fe3O4, with a remarkable 'Verwey transition' from metal to insulator at low temperature -- a highly sought-after property for nanoelectronics July 19th, 2019

Electronic chip mimics the brain to make memories in a flash: Engineers have mimicked the human brain with an electronic chip that uses light to create and modify memories. July 19th, 2019

Nanometrics to Announce Second Quarter Financial Results on July 30, 2019 July 17th, 2019

Discoveries

Resistance is utile: Magnetite nanowires with sharp insulating transition: Osaka University-led researchers make ultra-thin nanowires of Fe3O4, with a remarkable 'Verwey transition' from metal to insulator at low temperature -- a highly sought-after property for nanoelectronics July 19th, 2019

Tiny vibration-powered robots are the size of the world's smallest ant July 19th, 2019

A graphene superconductor that plays more than one tune: Researchers at Berkeley Lab have developed a tiny toolkit for scientists to study exotic quantum physics July 19th, 2019

Electronic chip mimics the brain to make memories in a flash: Engineers have mimicked the human brain with an electronic chip that uses light to create and modify memories. July 19th, 2019

Materials/Metamaterials

Resistance is utile: Magnetite nanowires with sharp insulating transition: Osaka University-led researchers make ultra-thin nanowires of Fe3O4, with a remarkable 'Verwey transition' from metal to insulator at low temperature -- a highly sought-after property for nanoelectronics July 19th, 2019

Breakthrough material could lead to cheaper, more widespread solar panels and electronics July 16th, 2019

NUS ‘smart’ textiles boost connectivity between wearable sensors by 1,000 times: Metamaterials are incorporated into conventional clothing to dramatically improve signal strength between electronic devices, allowing for new applications July 15th, 2019

Strange warping geometry helps to push scientific boundaries July 12th, 2019

Announcements

Resistance is utile: Magnetite nanowires with sharp insulating transition: Osaka University-led researchers make ultra-thin nanowires of Fe3O4, with a remarkable 'Verwey transition' from metal to insulator at low temperature -- a highly sought-after property for nanoelectronics July 19th, 2019

Tiny vibration-powered robots are the size of the world's smallest ant July 19th, 2019

A graphene superconductor that plays more than one tune: Researchers at Berkeley Lab have developed a tiny toolkit for scientists to study exotic quantum physics July 19th, 2019

Electronic chip mimics the brain to make memories in a flash: Engineers have mimicked the human brain with an electronic chip that uses light to create and modify memories. July 19th, 2019

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

Resistance is utile: Magnetite nanowires with sharp insulating transition: Osaka University-led researchers make ultra-thin nanowires of Fe3O4, with a remarkable 'Verwey transition' from metal to insulator at low temperature -- a highly sought-after property for nanoelectronics July 19th, 2019

Tiny vibration-powered robots are the size of the world's smallest ant July 19th, 2019

A graphene superconductor that plays more than one tune: Researchers at Berkeley Lab have developed a tiny toolkit for scientists to study exotic quantum physics July 19th, 2019

Electronic chip mimics the brain to make memories in a flash: Engineers have mimicked the human brain with an electronic chip that uses light to create and modify memories. July 19th, 2019

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