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Theoretical investigations of spin transfer torque in magnetic tunnel junctions using the tight-binding model in the framework of non-equilibrium Green functions formalism are presented. We show that the behavior of the spin transfer torque…

Materials Science · Physics 2009-11-13 M. Chshiev , I. Theodonis , A. Kalitsov , N. Kioussis , W. H. Butler

We define the metamagnetic phase transition of itinerant electrons controlled by the spin injection mechanism. The current flow between a ferromagnetic metal and a metamagnetic metal produces the non-equilibrium shift of chemical potential…

Mesoscale and Nanoscale Physics · Physics 2015-01-06 A. A. Zyuzin , A. Yu. Zyuzin

A system exhibiting multiple simultaneously broken symmetries offers the opportunity to influence physical phenomena such as tunneling currents by means of external control parameters. Time-reversal symmetry and inversion symmetry are both…

Strongly Correlated Electrons · Physics 2007-05-23 J. Linder , M. S. Gronsleth , A. Sudbo

We study the magnetization dynamics of spin valve structures with a free composite synthetic ferromagnet (SyF) that consists of two ferromagnetic layers coupled through a normal metal spacer. A ferromagnetically coupled SyF can be excited…

Mesoscale and Nanoscale Physics · Physics 2013-02-25 Yan Zhou , Jiang Xiao , Gerrit E. W. Bauer , F. C. Zhang

Using a semiclassical approach that simultaneously incorporates the spin Hall effect (SHE), spin diffusion, quantum well states, and interface spin-orbit coupling (SOC), we address the interplay of these mechanisms as the origin of the…

Mesoscale and Nanoscale Physics · Physics 2018-05-09 Kohei Sakanashi , Manfred Sigrist , Wei Chen

We analyze electron spin relaxation in electronic transport through coherently coupled double quantum dots in the spin blockade regime. In particular, we focus on hyperfine interaction as the spin relaxation mechanism. We pay special…

Mesoscale and Nanoscale Physics · Physics 2015-03-13 Carlos López-Monís , Jesús Iñarrea , Gloria Platero

We show that spin transfer torque from direct spin-polarized current applied parallel to a magnetic domain wall (DW) induces DW motion in a direction independent of the current polarity. This unidirectional response of the DW to spin torque…

Other Condensed Matter · Physics 2015-05-14 Carl T. Boone , Ilya N. Krivorotov

In the past year, several groups have observed evidence for long-range spin-triplet supercurrent in Josephson junctions containing ferromagnetic (F) materials. In our work, the spin-triplet pair correlations are created by non-collinear…

Current-driven magnetization dynamics in ferromagnetic metals are studied in a self-consistent adiabatic local-density approximation in the presence of spin-conserving and spin-dephasing impurity scattering. Based on a quantum kinetic…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Yaroslav Tserkovnyak , Hans Joakim Skadsem , Arne Brataas , Gerrit E. W. Bauer

We propose an experimental scheme to determine the spin-transfer torque efficiency excited by the spin-orbit interaction in ferromagnetic bilayers from the measurement of the longitudinal magnetoresistace. Solving a diffusive spin-transport…

Mesoscale and Nanoscale Physics · Physics 2016-10-04 Tomohiro Taniguchi , Julie Grollier , Mark D. Stiles

The transport properties of a twisted bilayer graphene barrier are investigated for various twist angles. Remarkably, for small twist angles around the magic angle $\theta_m \sim 1.05^{\circ}$, the local currents around the AA-stacked…

Mesoscale and Nanoscale Physics · Physics 2020-07-28 D. A. Bahamon , G. Gómez-Santos , T. Stauber

Two dimensional (2D) materials provide a unique platform to explore the full potential of magnetic proximity driven phenomena, which can be further used for applications in next generation spintronic devices. Of particular interest is to…

We calculate the interaction between two magnetic domain walls during their current-induced motion. This interaction produces a separation-dependent resistance and also a differential velocity, causing domains in motion to experience an…

Mesoscale and Nanoscale Physics · Physics 2011-11-28 E. A. Golovatski , M. E. Flatté

Interfaces play a substantial role for the functional properties of structured magnetic materials and magnetic multilayers. Modeling the functional behavior of magnetic materials requires the treatment of the relevant phenomena at the…

Spin-orbit torque can drive electrical switching of magnetic layers. Here, we report that at least for micrometer-sized samples there is no simple correlation between the efficiency of dampinglike spin-orbit torque ({\xi}_DL^j) and the…

Materials Science · Physics 2021-03-03 Lijun Zhu , D. C. Ralph , R. A. Buhrman

Spin-orbit-related effects offer a highly promising route for reading and writing information in magnetic units of future devices. These phenomena rely not only on the static magnetization orientation but also on its dynamics to achieve…

Mesoscale and Nanoscale Physics · Physics 2017-06-19 Filipe S. M. Guimarães , Manuel dos Santos Dias , Juba Bouaziz , Antonio T. Costa , Roberto B. Muniz , Samir Lounis

Current-induced torques on ferromagnetic nanoparticles and on domain walls in ferromagnetic nanowires are normally understood in terms of transfer of conserved spin angular momentum between spin-polarized currents and the magnetic…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 P. M. Haney , R. A. Duine , A. S. Nunez , A. H. MacDonald

The long-range spin-triplet supercurrent transport is an interesting phenomenon in the superconductor/ferromagnet ($S/F$) heterostructure containing noncollinear magnetic domains. Here we study the long-range superharmonic Josephson current…

Superconductivity · Physics 2015-10-27 Hao Meng , Jiansheng Wu , Xiuqiang Wu , Mengyuan Ren , Yajie Ren

We study charge and energy transport in a quasi-1D magnetic wire in the presence of magnetic textures. The energy flows can be expressed in a fashion similar to charge currents, leading to new energy-current induced spin torques. In analogy…

Mesoscale and Nanoscale Physics · Physics 2009-10-10 Alexey A. Kovalev , Yaroslav Tserkovnyak

We present a phenomenological theory for coupled spin-charge dynamics in magnetic van der Waals heterostructures. The system studied consists of a layered antiferromagnet inserted into a capacitive vdW heterostructure. It has been recently…

Mesoscale and Nanoscale Physics · Physics 2020-09-23 Avinash Rustagi , Abhishek Solanki , Yaroslav Tserkovnyak , Pramey Upadhyaya
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