spintronics – TechConnect Briefs

Spintronics: Recent developments on ultra-low-energy, area-efficient, and fast spin-devices and spin-circuits

Roy K., Purdue University, US

Electronics harnessed by electron's spin-based counterpart, so-called spintronics, has been widely studied in the context of nanomagnets. I will speak on the recent developments on ultra-low-energy, area-efficient, and fast spintronic devices, in particular on electric [...]

Anti-Crossing Levels and Electron Tunneling in Quantum Rings

Filikhin I., Matinyan S.G., Nimmo J., Vlahovic B., North Carolina Central University, US

Quantum Rings (QR) attracted attention during the last decade because of remarkable meso and nano-structures, due to non-simple connected topology. In our work [3] it was shown that in the weakly coupled double concentric quantum [...]

The manifestation of the one-dimensional non-collinear spin-dependent scattering on magnetized nano-element structures

Sahakyan A.S., Movsesyan R.M., Kocharian A.N., California State University Los Angeles, US

The transfer-matrix approach is used to investigate the scattering of spin-polarized electron and neutron waves on the simple magnetized nanoelement structures which energetic profiles presents a finite potential magnetic barrier, in particular, of rectangular form. [...]

Computer Simulations of CrO2 as a Spin Polarized Material for Spintronics

Kaur R., Mallia G., Yates K.A., Harrison N.M., Imperial College London, UK

Despite theoretical predictions of chromium dioxide being a half-metallic ferromagnet. Devices based on chromium dioxide have performed poorly. One major issue is the influence of defects on the electronic structure and magnetic properties as well [...]

Spin Dependent Transport in Carbon Nanostructures

Harrison N.M., Montanari B., Imperial College London, UK

A theoretical investigation of the electronic and magnetic structure in carbon nanoribbons, defective graphene and carbon peapod structures. The critical importance of electron correlation in the emergent behaviour will be demonstrated for; the generation of [...]

Theoretical Investigation CrO2 as a Spin-Polarized Material

Swaim J.D., Mallia G., Harrison N.M., Imperial College London, UK

Spintronics represent a new class of electronic devices, based on their ability to conduct spin-polarized currents. CrO2 has received much attention as a potential spintronic material due to its theoretical 100% spin-polarization. Band structure calculations [...]

First-principles Modeling of Magnetic Memory Components — Preliminary Results on the Effects of Interface Oxides

Stilling M., Stokbro K., Flensberg K., Atomistix, DK

Magnetotunnel junctions (MTJs), exhibiting high tunneling magnetoresistance (TMR), are currently being employed in new generations of hard disk drive (HDD) read heads and novel magnetic random access memory (MRAM) technology. We have modeled such spintronic [...]

Low-Temperature Synthesis and Magnetic Characterization of Doped-ZnS Nanostructures

Dussan Devia S., Tomar M.S., Morales L.M., Mata O., Jia W., University of Puerto Rico, Mayaguez Campus, PR

Nanostructured DMSs are of great importance due to potential applications in spintronics and photo-electronic devices. Recent studies propose that ZnS doped with transition metal ions can exhibit ferromagnetic behavior at room temperature. The present work [...]

Spin Density Functional Theory Simulations of Quantum Point Contacts: An Investigation of Spin Filtering Effects

Akis R., Ferry D.K., Arizona State University, US

We present simulations of quantum wires and quantum point contacts (QPCs) formed in semiconductor heterostructures. Conductance measurements for such structures is quantized with plateaus at integer multiples of G_0= (2e^2/h) as function of gate voltage, [...]

Quantum Information Processing with Nuclear Spin-Based Devices

Havel T.F., Cappellaro P., Ramanathan C., Cory D.G., Massachusetts Institute of Technology, US

This talk will illustrate the benefits offered by QIP with two devices which use quantum entanglement among nuclear spins to defeat the Heisenberg limits: (1) a spin gyroscope that operates by detecting the frequency shift [...]