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We simulate the electron transport in vertical bi-layer nanowire which can be fabricated in molecular beam epitaxy process with lateral confinement potential formed by means of cleaved overgrowth or surface oxidization methods giving…

Mesoscale and Nanoscale Physics · Physics 2016-01-20 T. Chwiej

We examine magnetic and electric near horizon regions of maximally supersymmetric D-brane and NS5-brane bound states and find transformations between near horizon regions with worldvolume dual magnetic and electric fluxes. These point to…

High Energy Physics - Theory · Physics 2010-05-28 H. Larsson , P. Sundell

We propose a method, which enables precise control of magnetic patterns, relying only on the fundamental properties of the wire and the choice of the path in the controlled parameter space but not on the rate of motion along this path.…

Materials Science · Physics 2009-11-13 N. A. Sinitsyn , V. V. Dobrovitski , S. Urazhdin , A. Saxena

We consider the ($3{+}1$)-dimensional Maxwell theory in the situation where going around nontrivial paths in the spacetime involves the action of the duality transformation exchanging the electric field and the magnetic field, as well as…

High Energy Physics - Theory · Physics 2019-10-18 Chang-Tse Hsieh , Yuji Tachikawa , Kazuya Yonekura

Architectures that incorporate Computing-in-Memory (CiM) using emerging non-volatile memory (NVM) devices have become strong contenders for deep neural network (DNN) acceleration due to their impressive energy efficiency. Yet, a significant…

Hardware Architecture · Computer Science 2024-01-12 Zheyu Yan , Xiaobo Sharon Hu , Yiyu Shi

In case of a spin-polarized current, the magnetization dynamics in nanowires are governed by the classical Landau-Lifschitz equation with Gilbert damping term, augmented by a typically non-variational Slonczewski term. Taking axial symmetry…

Analysis of PDEs · Mathematics 2020-06-24 Lars Siemer , Ivan Ovsyannikov , Jens D. M. Rademacher

We demonstrate the possibility to write and modulate the magnetic domain walls in a TbFeCo single layer nanowire (300 nm width, 150 $\mu$m length). To realize this, a tiny magnetic domain was nucleated by an Oersted field produced by a 1.6…

Materials Science · Physics 2012-05-01 Duc-The Ngo , Kotaro Ikeda , Hiroyuki Awano

The demonstration of the generation and control of a pure spin current (without net charge flow) by electric fields and/or temperature gradient has been an essential leap in the quest for low-power consumption electronics. The key issue of…

Mesoscale and Nanoscale Physics · Physics 2013-10-10 Chenglong Jia , Jamal Berakdar

The advent of wurtzite ferroelectrics is enabling a new generation of ferroelectric devices for computer memory that has the potential to bypass the von Neumann bottleneck, due to their robust polarization and silicon compatibility.…

Materials Science · Physics 2024-10-25 Drew Behrendt , Atanu Samanta , Andrew M. Rappe

We express dynamics of domain walls in ferromagnetic nanowires in terms of collective coordinates generalizing Thiele's steady-state results. For weak external perturbations the dynamics is dominated by a few soft modes. The general…

Materials Science · Physics 2008-03-31 O. A. Tretiakov , D. Clarke , Gia-Wei Chern , Ya. B. Bazaliy , O. Tchernyshyov

Non-volatile memory (NVM) technologies such as spin-transfer torque magnetic random access memory (STT-MRAM) and spin-orbit torque magnetic random access memory (SOT-MRAM) have significant advantages compared to conventional SRAM due to…

Hardware Architecture · Computer Science 2022-05-23 Ahmet Inci , Mehmet Meric Isgenc , Diana Marculescu

In this work, we report analytical results on transverse domain wall (TDW) statics and field-driven dynamics in quasi one-dimensional biaxial nanowires under arbitrary uniform transverse magnetic fields (TMFs) based on the…

Mesoscale and Nanoscale Physics · Physics 2016-12-16 Jie Lu

We present a new algorithm for the 2D Sliding Window Discrete Fourier Transform (SWDFT). Our algorithm avoids repeating calculations in overlapping windows by storing them in a tree data-structure based on the ideas of the Cooley- Tukey…

Data Structures and Algorithms · Computer Science 2019-03-01 Lee F. Richardson , William F. Eddy

The transmission of correlated electrons through a domain wall in ferromagnetic quasi-one-dimensional systems is studied theoretically in the case when the domain wall width is comparable with the Fermi wavelength of the charge carriers.…

Strongly Correlated Electrons · Physics 2007-05-23 M. A. N. Araujo , V. K. Dugaev , V. R. Vieira , J. Berakdar , J. Barnas

A domain wall in a ferromagnetic one-dimensional nanowire experiences current induced motion due to its coupling with the conduction electrons. When the current is not sufficient to drive the domain wall through the wire, or it is confined…

Mesoscale and Nanoscale Physics · Physics 2012-07-13 Nicholas Sedlmayr , Jamal Berakdar

Chiral magnetic materials provide a number of challenging issues such as the highly efficient domain wall (DW) and skyrmion motions driven by electric current, as of the operation principles of emerging spintronic devices. The DWs in the…

We propose a mechanism for nucleation and high-density packing of 360{\deg} domain walls (DWs) on planar ferromagnetic nanowires, of 100 nm width, by using circular magnetic fields. The extent of the stray field from a 360{\deg} DW is…

Materials Science · Physics 2015-11-03 F. I. Kaya , A. Sarella , D. Wang , M. Tuominen , K. E. Aidala

We investigate the magnetic domain wall (DW) dynamics in uniaxial/biaxial nanowires under a thermal gradient (TG). The findings reveal that the DW propagates toward the hotter region in both nanowires. The main physics of such observations…

Mesoscale and Nanoscale Physics · Physics 2023-05-03 M. T. Islam , M. A. S. Akanda , F. Yesmin , M. A. J. Pikul , J. M. T. Islam

The development of deep neural networks is witnessing fast growth in network size, which requires novel hardware computing platforms with large bandwidth and low energy consumption. Optical computing has been a potential candidate for…

We investigate field-driven domain wall (DW) propagation in magnetic nanowires in the framework of the Landau-Lifshitz-Gilbert equation. We propose a new strategy to speed up the DW motion in a uniaxial magnetic nanowire by using an optimal…

Materials Science · Physics 2015-05-14 Z. Z. Sun , J. Schliemann