Sentences with phrase «electrons spinning at»

Ferrimagnetic materials can be thought of as a mixture of electrons spinning at different sites in the material.

Two years ago, an international team of researchers showed that by manipulating electron spin at a quantum magnetic tunneling junction — a nanoscale sandwich made of two metal electrodes with an insulator in the middle — they could induce a large increase in the junction's capacitance.

In a ferromagnetic material, such as iron or nickel, the randomness of the electron spins at high temperatures makes the material symmetric in all directions.

Not exact matches

Spin drops out naturally like a golden egg, so to speak, from the Dirac equation likewise the magnetism of the electron also drops out at that equation.

WHIRL AWAY Electrons in platinum move in different directions depending on their spin when the metal is heated at one end.

At room temperature the motions of electron spins can be largely affected by heat.

That was true until physicists found that the electrons in spin ices behave collectively like magnetic monopoles at temperatures close to absolute zero (0 Kelvin, -273 ºC).

Spin transfer torque is the transfer of the spin angular momentum from conduction electrons to the magnetization of a ferromagnet and enables the manipulation of nanomagnets with spin currents rather than magnetic fields,» explained Gyung - Min Choi, who recently completed his PhD in materials science and engineering at IllinSpin transfer torque is the transfer of the spin angular momentum from conduction electrons to the magnetization of a ferromagnet and enables the manipulation of nanomagnets with spin currents rather than magnetic fields,» explained Gyung - Min Choi, who recently completed his PhD in materials science and engineering at Illinspin angular momentum from conduction electrons to the magnetization of a ferromagnet and enables the manipulation of nanomagnets with spin currents rather than magnetic fields,» explained Gyung - Min Choi, who recently completed his PhD in materials science and engineering at Illinspin currents rather than magnetic fields,» explained Gyung - Min Choi, who recently completed his PhD in materials science and engineering at Illinois.

At present, attempts are being made to build quantum computers using, among others, trapped ions, electron spins in diamond, quantum dots, superconducting electric circuits, and atomic clouds.

Today, this behaviour is very well understood at the microscopic level: magnetism goes back to the angular momentum — the spin — of the electrons in the outer shell of the atoms that build up a solid state crystal.

However, if the electron collides on the interface between YIG and platinum, this influences the magnetisation at the YIG surface and the electron spin is transferred.

And that if you heat a magnet up enough, then you have no magnet at all: High temperatures randomly jumble all the bits of magnetic material (ultimately orientations of spinning electrons) that had aligned themselves along the north - to - south - pole axis.

In quantum theory, an electron can spin one way (up), the other way (down), or literally both ways at once.

UCSB's David Awschalom and his longtime collaborator at Penn State, Nitin Samarth, devised a new technique for manipulating electron spins within ultrafast timescales.

«We've shown how to continuously flip the electron spin in a nanodiamond levitated in a vacuum and in the presence of different gases,» said Tongcang Li, an assistant professor of physics and astronomy and electrical and computer engineering at Purdue University.

Earth's magnetic field may influence the spin of these free electrons, which birds could then detect, explains biophysicist Thorsten Ritz of the University of California at Irvine, who was not involved in the Heyers study.

But thanks to an eerie quantum effect known as superposition — which allows an atom, electron or other particle to exist in two or more states, such as «spinning» in opposite directions at once — a single qubit made of a particle in superposition can simultaneously encompass both digits.

At extremely low temperatures, these spins tend to align, lowering the electrons» total energy.

SuperB would use the massive magnets from the idle PEP - II collider at SLAC National Accelerator Laboratory in Menlo Park, California; would cost about $ 450 million; would smash particles at a slightly higher rate; and would used a spin - polarized electron beam, says David Hitlin, a physicist at the California Institute of Technology in Pasadena who works on the project.

Now researchers at the University of Utah, The Florida State University, University College London and the University of Sydney in Australia report a way to extend that informational lifetime to more than 100 seconds by encoding an electron's spin onto the much longer - lived spin of an atomic nucleus, which can then be read out electronically.

At the edges of this material, the spin of electrons — a particle property that functions a bit like a compass needle pointing either north or south — and their momentum are closely tied and predictable.

Consequently, the analysis revealed that the metal atoms at the center of the organic molecules retained electron spins, which could generate magnetism.

Two examples: graphene — single - atom - thick sheets of carbon atoms — has unique mechanical, electrical, and optical properties; and two - dimensional electron gases (2DEG)-- planar collections of electrons supported at the interface between certain semiconductors such as gallium arsenide — allow the observation of such emergent behaviors as the quantum Hall effect and the spin Hall effect.

«It's a scalable, controllable way to manipulate the electron's spin at the nanometer scale,» Awschalom says.

First, thermal fluctuations at room temperature flipped electron spins.

Engineered electron spin and charge polarization, as well as transport across or along the interface, might be possible as evidenced by the enhanced photoluminescence signals at these positions.

In a typical charge current, electrons» spin - angular - momentum is random so there is no spin current,» explained David Cahill, a professor of materials science and engineering at Illinois.

«A spin wave travels at a slower rate than an electron wave,» he notes.

For example, wires with Majoranas at either end can be used to transfer information between far away quantum bits that rely on the spin of electrons.

To quantify the energy change, siderite's spin transition was examined using highly sensitive spectroscopic techniques at pressures ranging from zero to about 711,000 times normal atmospheric pressure (72 gigapascals), and also revealed by a visible color change after the transition, indicating rearrangement of electrons.

«We have created a new quantum bit where the spin of a single electron is merged together with a strong electromagnetic field,» said Arne Laucht, a Research Fellow at the School of Electrical Engineering & Telecommunications at UNSW, and lead author of the paper.

The wave of electron spins flipping in sequence might look something like fans at a football game standing and sitting back down to make a wave go around the stadium.

In a significant step forward for quantum computing in silicon - the same material used in today's computers — a team led by researchers at Princeton University successfully coupled a single electron's quantum information, or spin, to a particle of light, or photon.

The Nitrogen - Vacancy defect (NV centre) in diamonds and diamond nanocrystals (nanodiamonds) provides a unique alternative for DNP as the NV centre electron spin can be optically polarized to over 90 % polarization at room temperature by short laser pulses.

We combine this scheme with optically polarized nitrogen - vacancy (NV) center spins in diamonds which provides near perfect electron polarization source at room temperature.

Michael Roukes, a physicist developing nanoscale tools for bioscience and medicine, says «Room at the Bottom» anticipated a host of important technologies and scientific fields, including spin electronics («spintronics»), microelectromechanical systems (MEMS), electron - beam and ion - beam fabrication and much more.