Single phosphorus atom transistor

Single phosphorus atom transistor

 · Single-Atom Transistor: A phosphorous atom [center of computer model] sits in a channel in a silicon crystal. It acts as the smallest transistor yet and could be key to future quantum computers. Click on the image to blogger.comted Reading Time: 11 mins  · A controllable transistor engineered from a single phosphorus atom has been developed by researchers at the University of New South Wales, Purdue University and the University of Melbourne. The atom, shown here in the center of an image from a computer model, sits in a channel in a silicon crystal. The atomic-sized transistor and wires might allow researchers to control gated qubits of  · A single phosphorus atom is deterministically positioned between source, drain and gate electrodes within an epitaxial silicon device architecture to make a single-atom blogger.com by:

One and done: Single-atom transistor is end of Moore's Law; may be beginning of quantum computing

A controllable transistor engineered from a single phosphorus atom has been developed by researchers at the University of New South Wales, Purdue University and the University of Melbourne. The atom, shown here in the center of an image from a computer model, sits in a channel in a silicon crystal. The atomic-sized transistor and wires might allow researchers to control gated qubits of information in future quantum computers. Purdue University image.

Download image. WEST LAFAYETTE, Ind. The single-atom device was described Sunday Feb. Michelle Simmons, group leader and director of the ARC Centre for Quantum Computation and Communication at the University of New South Wales, says the development is less about improving current technology than building future tech.

As we transition to atomic-scale devices, single phosphorus atom transistor, we are now entering a new paradigm where quantum mechanics promises a similar technological disruption. It is the promise of this future technology that makes this present development so exciting, single phosphorus atom transistor. The same research team announced in January that it had developed a wire of phosphorus and silicon - just one atom tall and four atoms wide - that behaved like copper wire.

Simulations of the atomic transistor to model its behavior were conducted at Purdue using nanoHUB technology, an online community resource site for researchers in computational nanotechnology. Gerhard Klimeck, who directed the Purdue group that ran the simulations, says this is an important development because it shows how small electronic components can be engineered.

Although definitions can vary, simply stated Moore's Law holds that the number of transistors that can be placed on a processor will double approximately every 18 months. The latest Intel chip, single phosphorus atom transistor "Sandy Bridge," uses a manufacturing process to place 2.

A single phosphorus atom, by comparison, is just 0. The single-atom transistor does have one serious limitation: It must be kept very cold, at least as cold as liquid nitrogen, or minus degrees Fahrenheit minus Celsius. For this atom to act like a metal you have to contain the electrons to the channel. But this is a fundamental question for this technology.

Although single atoms serving as transistors have been observed before, this is the first time a single-atom transistor has been controllably engineered with atomic precision. The structure even has markers that allow researchers to attach contacts and apply a voltage, says Martin Fuechsle, a researcher at the University of New South Wales and lead author on the journal paper. Simmons says this control is the key step in making a single-atom device. The single-atom transistor could lead the way to building a quantum computer that works by controlling the electrons and thereby the quantum information, or qubits.

Some scientists, however, have doubts that such a device can ever be built. The technique we have developed is potentially scalable, using the same materials as the silicon industry, but more time is needed to realize this goal.

This will lead to many more discoveries. However, single phosphorus atom transistor, on reading into the literature I could not see any practical reason why it would not be possible," Simmons says. Klimeck notes that modern collaboration and community-building tools such as nanoHUB played an important role.

Now Purdue graduate students spend time studying at the University of New South Wales, and their single phosphorus atom transistor travel to Purdue to learn more about nanotechnology. It has been a rewarding collaboration, both for the scientific discoveries and for the personal relationships that were formed. Writer: Steve Tally,tally single phosphorus atom transistor. edusingle phosphorus atom transistor, Twitter: sciencewriter.

Sources: Michelle Simmons, michelle. simmons unsw, single phosphorus atom transistor. au Gerhard Klimeck,gekco purdue. edu University of New South Wales media contact: Mary O'Malley,m. omalley unsw. Down to the wire for silicon: Researchers create a wire 4 atoms wide, 1 atom tall. Network for Computational Nanotechnology. A Single-Atom Transistor. Martin Fuechsle, Jill A. Miwa, single phosphorus atom transistor, Suddhasatta Mahapatra, single phosphorus atom transistor, Michelle, Y.

Simmons, Centre for Quantum Computation and Communication Technology, University of New South Wales, Sydney, Australia Oliver Warschkow, single phosphorus atom transistor, University of Sydney, Sydney, Australia.

Hoon Ryu, Sunhee Lee, Gerhard Klimeck, Network for Computational Nanotechnology, Purdue University, West Lafayette, Ind. Lloyd C. Hollenberg, Centre for Quantum Computation and Communication Technology, University of Melbourne, Parkville, Australia. Single phosphorus atom transistor ability to control matter at the atomic scale and build devices with atomic precision is central to nanotechnology.

The scanning tunneling microscope can manipulate individual atoms and molecules on surfaces, single phosphorus atom transistor, but the manipulation of silicon to make atomic-scale logic circuits has been hampered by the covalent nature of its bonds. Resist-based strategies have allowed the formation of atomic-scale structures on silicon surfaces, but the fabrication of working devices - such as transistors with extremely short gate lengths, spin-based quantum computers and solitary dopant opteolectronic devices - requires the ability to position individual atoms in a silicon crystal with atomic precision.

Here we use a combination of scanning tunnelling microscopy and hydrogen-resist lithography to demonstrate a single-atom transistor in which single phosphorus atom transistor individual phosphorus dopant atom has been deterministically placed within an epitaxial silicon device architecture with a spatial accuracy of one lattice site. The transistor operates at liquid helium temperatures, and millikelvin electron transport measurements confirm the presence of discrete quantum levels in the energy spectrum of the phosphorus atom, with a charging energy that is close to the bulk value.

Previously, this single phosphorus atom transistor only been observed by optical spectroscopy. Copyright © Purdue University. Copyright Infringement Information. Maintained by: UNS Offer Feedback. University News Service. Search Purdue News. One and done: Single-atom transistor is end of Moore's Law; may be beginning of quantum computing February 19, Purdue University image Download image.

ABSTRACT A Single-Atom Transistor Martin Fuechsle, Jill A. Simmons, Centre for Quantum Computation and Communication Technology, University of New South Wales, Sydney, Australia Oliver Warschkow, University of Sydney, Sydney, Australia Hoon Ryu, Sunhee Lee, Gerhard Klimeck, Network for Computational Nanotechnology, Purdue University, West Lafayette, Ind. Hollenberg, Centre for Quantum Computation and Communication Technology, University of Melbourne, Parkville, Australia The ability to control matter at the atomic scale and build devices with atomic precision is central to nanotechnology.

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A Single-Atom Transistor

 · Single-Atom Transistor: A phosphorous atom [center of computer model] sits in a channel in a silicon crystal. It acts as the smallest transistor yet and could be key to future quantum computers. Click on the image to blogger.comted Reading Time: 11 mins  · A controllable transistor engineered from a single phosphorus atom has been developed by researchers at the University of New South Wales, Purdue University and the University of Melbourne. The atom, shown here in the center of an image from a computer model, sits in a channel in a silicon crystal. The atomic-sized transistor and wires might allow researchers to control gated qubits of  · A single phosphorus atom is deterministically positioned between source, drain and gate electrodes within an epitaxial silicon device architecture to make a single-atom blogger.com by: