Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Physicist Seeks Nanomaterials with Rationally Designed Properties

Doctoral student Benjamin Gray, left, and Jak Chakhalian in the laboratory with a unique state-of-the-art piece of equipment built last summer to fabricate atomic layers of complex oxides.
Doctoral student Benjamin Gray, left, and Jak Chakhalian in the laboratory with a unique state-of-the-art piece of equipment built last summer to fabricate atomic layers of complex oxides.

Abstract:
A University of Arkansas physicist has received the largest award granted to an individual researcher from the Army Research Laboratory to search for a novel class of nanomaterials with rationally designed properties.

Physicist Seeks Nanomaterials with Rationally Designed Properties

Fayetteville, AR | Posted on April 21st, 2011

Physicist Jak Chakhalian seeks to create a new class of materials - so-called topological insulators combined with magnetic and superconductivity properties within just a few atomic layers. From the practical perspective, having all of these properties in one material could lead to building never-before realized topological quantum computers, which could be used to break complex encryption codes and compute things beyond the power of today's supercomputers.

"If you have that, it will revolutionize the way we think about electrons moving in conventional insulators and metals even at the nanoscale," Chakhalian said. He has funding from the Army Research Laboratory of $1.2 million over five years.

Recently Chakhalian, associate professor of physics in the J. William Fulbright College of Arts and Sciences, and colleagues found a novel way to "look" at atomic orbitals and found that they change substantially at the interface between a ferromagnet and a high-temperature superconductor. This finding opens up a new way of designing nanoscale superconducting materials. It also fundamentally changes scientific convention, which suggests that only electron spin and atomic charge - not atomic orbitals - influence the properties of nanostructures. It also has profound implications for interfaces between many other complex oxide materials.

This research was cited by Science magazine as one of the top 10 research breakthroughs of 2007.
Until recently, researchers only recognized three fundamental types of materials: metals such as iron and gold, insulators and semiconductors. In 2006, theoretical physicists suggested that another completely unknown class of insulating materials might exist. This class, called topological insulators, would not conduct electricity inside the crystal but permits the perfect conduction on the surface within a single atomic layer. This happens because geometry protects the surface electrons. In 2007, scientists looked at the alloy bismuth telluride and found the properties that this theory predicted. They had discovered a new class of material.

"On the inside, bismuth telluride is an insulator, but on the surface, within one atomic layer, it's a perfect conductor," Chakhalian said. "It will conduct within the single atomic layer no matter how disordered the crystal on the inside. This is a whole new class of materials very similar to the Nobel prize-winning material, graphene, with many other interesting twists."
Chakhalian wants to create a topological insulator as a nanostructure with magnetic and superconducting properties in a few atomic layers at the interface. He admits that his goal is ambitious, but he likens the research to going to the moon in the 1960s - no one thought it could be done, but it happened.

"We need scientists to be courageous, to jump into the unknown," he said. Chakhalian will use the grant from the Army Research Laboratory to build new equipment to create and test atomically thin superlattices by combining novel materials and using the interface as a tool.

Chakhalian is a member of the University of Arkansas Institute for Nanoscience and Engineering. He holds the Charles E. and Clydene Scharlau Endowed Professorship in Chemistry.

####

For more information, please click here

Contacts:
Jak Chakhalian
associate professor of physics
J. William Fulbright College of Arts and Sciences
479-575-4313


Melissa Lutz Blouin
director of science and research communications
University Relations
479-575-5555

Copyright © Newswise

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

A compact, efficient single photon source that operates at ambient temperatures on a chip: Highly directional single photon source concept is expected to lead to a significant progress in producing compact, cheap, and efficient sources of quantum information bits for future appls May 3rd, 2016

Nuclear pores captured on film: Using an ultra fast-scanning atomic force microscope, researchers from the University of Basel have filmed 'living' nuclear pore complexes at work for the first time May 3rd, 2016

Little ANTs: Researchers build the world's tiniest engine May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Quantum sensors for high-precision magnetometry of superconductors May 3rd, 2016

Physics

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Quantum sensors for high-precision magnetometry of superconductors May 3rd, 2016

Superfast light source made from artificial atom April 28th, 2016

Laboratories

Exploring phosphorene, a promising new material April 29th, 2016

NREL finds nanotube semiconductors well-suited for PV systems April 27th, 2016

NREL theory establishes a path to high-performance 2-D semiconductor devices April 27th, 2016

Govt.-Legislation/Regulation/Funding/Policy

A compact, efficient single photon source that operates at ambient temperatures on a chip: Highly directional single photon source concept is expected to lead to a significant progress in producing compact, cheap, and efficient sources of quantum information bits for future appls May 3rd, 2016

Little ANTs: Researchers build the world's tiniest engine May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Making invisible physics visible: The Jayich Lab has created a new sensor technology that captures nanoscale images with high spatial resolution and sensitivity May 2nd, 2016

Chip Technology

A compact, efficient single photon source that operates at ambient temperatures on a chip: Highly directional single photon source concept is expected to lead to a significant progress in producing compact, cheap, and efficient sources of quantum information bits for future appls May 3rd, 2016

Spintronics for future information technologies: Spin currents in topological insulators controlled May 2nd, 2016

Cooling graphene-based film close to pilot-scale production April 30th, 2016

Exploring phosphorene, a promising new material April 29th, 2016

Quantum Computing

A compact, efficient single photon source that operates at ambient temperatures on a chip: Highly directional single photon source concept is expected to lead to a significant progress in producing compact, cheap, and efficient sources of quantum information bits for future appls May 3rd, 2016

Spintronics for future information technologies: Spin currents in topological insulators controlled May 2nd, 2016

Researchers create a first frequency comb of time-bin entangled qubits: Discovery is a significant step toward multi-channel quantum communication and higher capacity quantum computers April 28th, 2016

Superfast light source made from artificial atom April 28th, 2016

Announcements

A compact, efficient single photon source that operates at ambient temperatures on a chip: Highly directional single photon source concept is expected to lead to a significant progress in producing compact, cheap, and efficient sources of quantum information bits for future appls May 3rd, 2016

Nuclear pores captured on film: Using an ultra fast-scanning atomic force microscope, researchers from the University of Basel have filmed 'living' nuclear pore complexes at work for the first time May 3rd, 2016

Little ANTs: Researchers build the world's tiniest engine May 3rd, 2016

An Experiment Seeks to Make Quantum Physics Visible to the Naked Eye May 3rd, 2016

Military

Making invisible physics visible: The Jayich Lab has created a new sensor technology that captures nanoscale images with high spatial resolution and sensitivity May 2nd, 2016

Nanograft seeded with 3 cell types promotes blood vessel formation to speed wound healing April 27th, 2016

The light stuff: A brand-new way to produce electron spin currents - Colorado State University physicists are the first to demonstrate using non-polarized light to produce a spin voltage in a metal April 26th, 2016

NRL reveals novel uniform coating process of p-ALD April 21st, 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







Car Brands
Buy website traffic