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Key to future spintronics and spin-based information processing technologies is the generation, manipulation, and detection of spin polarization in a solid state platform. Here, we theoretically explore an alternative route to spin…

Mesoscale and Nanoscale Physics · Physics 2014-07-29 Carlos A. Meriles , Marcus W. Doherty

We report on experiments of spin filtering through ultra-thin single-crystal layers of the insulating and ferromagnetic oxide BiMnO3 (BMO). The spin polarization of the electrons tunneling from a gold electrode through BMO is analyzed with…

Materials Science · Physics 2009-11-11 M. Gajek , M. Bibes , A. Barthelemy , K. Bouzehouane , S. Fusil , M. Varela , J. Fontcuberta , A. Fert

The all-electrical realization of highly spin-polarized charge currents and their efficient conversion into pure spin currents remains a fundamental challenge in spintronics. Here, we report a spin-axis dynamic locking (SADL) effect in…

Other Condensed Matter · Physics 2025-11-25 Lv Zhiheng , Cai Jiangtao , Ma Dengpan , Xing Yan , Liu Zhifeng

We study ballistic transport through semiconductor quantum point contact systems under different confinement geometries and applied fields. In particular, we investigate how the {\em lateral} spin-orbit coupling, introduced by asymmetric…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 Anh T. Ngo , P. Debray , Sergio Ulloa

The discovery that a spin polarized current can exert a large torque on a ferromagnet through a transfusion of spin angular momentum, offers a new way to control a magnetization by simple current injection, without the help of an applied…

We show that the electron spin polarization generated by an electrical current may have its direction controlled and magnitude amplified by periodic optical excitation. The electrical and optical spin control methods were combined and…

Mesoscale and Nanoscale Physics · Physics 2014-07-17 Felix G. G. Hernandez , Gennady M. Gusev , Askhat K. Bakarov

We describe theoretically the process of multi-beam reflection in a two-dimensional electron system with a lateral potential barrier. Due to spin-orbital interaction, the reflection process leads to the formation of three beams with…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 A. O. Govorov , A. V. Kalameitsev , J. P. Dulka

Silicon quantum dots are considered an excellent platform for spin qubits, partly due to their weak spin-orbit interaction. However, the sharp interfaces in the heterostructures induce a small but significant spin-orbit interaction which…

We study the manipulation of the photoelectron spin-polarization in Bi$_2$Se$_3$ by spin- and angle-resolved photoemission spectroscopy. General rules are established that enable controlling the spin-polarization of photoemitted electrons…

It has been shown that tunneling of spin-polarized electrons through a semiconductor barrier is accompanied by generation of an electric current in the plane of the interfaces. The direction of this interface current is determined by the…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 S. A. Tarasenko , V. I. Perel' , I. N. Yassievich

Room temperature operation of a spin exclusive or (XOR) gate was demonstrated in lateral spin valve devices with nondegenerate silicon (Si) channels. The spin XOR gate is a fundamental part of the magnetic logic gate (MLG) that enables…

Applied Physics · Physics 2020-04-15 R. Ishihara , Y. Ando , S. Lee , M. Goto , S. Miwa , Y. Suzuki , H. Koike , M. Shiraishi

The generation of pure spin currents is critical for low-dissipation spintronic applications, yet existing methods relying on spin-orbit coupling or ferromagnetic interfaces face challenges in material compatibility and operational…

Materials Science · Physics 2025-10-14 Yingwei Chen , Junyi Ji , Liangliang Hong , Xiangang Wan , Hongjun Xiang

The spin transport characteristics of a nanowire directional electronic coupler have been evaluated theoretically via a transfer matrix approach. The application of a gate field in the region of mixing allows for control of spin current…

Mesoscale and Nanoscale Physics · Physics 2015-06-16 M. Rebello Sousa Dias , V. Lopez-Richard , G. E. Marques , S. E. Ulloa

We demonstrate an electrically controlled high-spin (S=5/2) to low-spin (S=1/2) transition in a three-terminal device incorporating a single Mn2+ ion coordinated by two terpyridine ligands. By adjusting the gate-voltage we reduce the…

We have measured and modeled, using three different approaches, the tunneling current in a Nb/NbxOy/Ni planar tunnel junction. The experimental data could be fitted and the correct current polarization could be extracted using a simple…

Generating efficient and highly spin-polarized currents through nanoscale junctions is essential in the field of nanoelectronics and spintronics. In this paper, using $ab$ $initio$ electron transport calculations, we predict highly…

Mesoscale and Nanoscale Physics · Physics 2019-05-30 Dongzhe Li

We report electrical measurements of the current-induced spin polarization of the surface current in topological insulator devices where contributions from bulk and surface conduction can be disen- tangled by electrical gating. The devices…

Mesoscale and Nanoscale Physics · Physics 2015-10-28 Joon Sue Lee , Anthony Richardella , Danielle Reifsnyder Hickey , K. Andre Mkhoyan , Nitin Samarth

In electronics, information has been traditionally stored, processed and communicated using an electron's charge. This paradigm is increasingly turning out to be energy-inefficient, because movement of charge within an…

Mesoscale and Nanoscale Physics · Physics 2009-09-22 Supriyo Bandyopadhyay , Marc Cahay

The control of "flying" (or moving) spin qubits is an important functionality for the manipulation and exchange of quantum information between remote locations on a chip. Typically, gates based on electric or magnetic fields provide the…

Mesoscale and Nanoscale Physics · Physics 2022-10-12 Paul L. J. Helgers , James A. H. Stotz , Haruki Sanada , Yoji Kunihashi , Klaus Biermann , Paulo V. Santos

Manipulating spin-orbit coupling (SOC) is important for devices such as spin-orbit torque based memory and its understanding is neccessary to answer several fundamental open questions in triplet state superconductivity, topological…

Mesoscale and Nanoscale Physics · Physics 2017-09-13 Kalon Gopinadhan , A. Annadi , Younghyun Kim , Amar Srivastava , Brijesh Kumar , Jingsheng Chen , J. M. D. Coey , Ariando , T. Venkatesan