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Related Experiment Video

Updated: May 31, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Ab initio simulation of magnetic tunnel junctions.

Derek Waldron¹, Lei Liu, Hong Guo

¹Centre for the Physics of Materials and Department of Physics, McGill University, Montreal, PQ, H3A 2T8, Canada.

|July 7, 2011

Summary

We developed an ab initio method to calculate spin-polarized quantum transport in spintronic devices. This approach, using density functional theory and non-equilibrium Green

Area of Science:

Physics
Materials Science
Quantum Mechanics

Background:

Spintronic devices offer advanced functionalities beyond traditional electronics.
Accurate theoretical modeling is crucial for designing efficient spintronic devices.
Understanding spin-polarized transport is key to controlling electron spin in nanoscale systems.

Purpose of the Study:

To present a novel ab initio method for calculating quantum transport properties.
To detail the mathematical and implementation aspects of the developed method.
To investigate spin-polarized transport in a Fe/MgO/Fe trilayer structure.

Main Methods:

Density Functional Theory (DFT) for electronic structure calculations.
Keldysh non-equilibrium Green's function (NEGF) formalism for transport calculations.

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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

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Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

Published on: January 21, 2016

Self-consistent calculation of spin densities under external bias.

Main Results:

The study provides a robust method for simulating spin-polarized quantum transport.
Demonstrated application to a Fe/MgO/Fe trilayer system.
Analysis of nonlinear and non-equilibrium transport phenomena.

Conclusions:

The presented ab initio DFT-NEGF method is effective for spintronic device simulations.
The findings contribute to the understanding of spin transport in magnetic tunnel junctions.
This work facilitates the design and optimization of future spintronic devices.