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The possibility of transporting spin information over long distances in graphene, owing to its small intrinsic spin-orbit coupling (SOC) and the absence of hyperfine interaction, has led to intense research into spintronic applications.…

介观与纳米尺度物理 · 物理学 2018-05-01 Dinh Van Tuan , Frank Ortmann , David Soriano , Sergio O. Valenzuela , Stephan Roche

Predictions state that graphene can spontaneously develop magnetism from the Coulomb repulsion of its $\pi$-electrons, but its experimental verification has been a challenge. Here, we report on the observation and manipulation of individual…

介观与纳米尺度物理 · 物理学 2019-01-15 Jingcheng Li , Sofia Sanz , Martina Corso , Deung Jang Choi , Diego Peña , Thomas Frederiksen , Jose Ignacio Pascual

We study spin transport in normal/ferromagnetic/normal graphene junctions where a gate electrode is attached to the ferromagnetic graphene. We find that due to the exchange field of the ferromagnetic graphene, spin current through the…

介观与纳米尺度物理 · 物理学 2009-11-13 Takehito Yokoyama

The magnetic properties of disordered graphene and irradiated graphite are systematically studied using a combination of mean-field Hubbard model and first-principles calculations. By considering large-scale disordered models of graphene, I…

材料科学 · 物理学 2008-07-17 Oleg V. Yazyev

We consider spin effects related to the random spin-orbit interaction in graphene. Such a random interaction can result from the presence of ripples and/or other inhomogeneities at the graphene surface. We show that the random spin-orbit…

介观与纳米尺度物理 · 物理学 2015-05-20 V. K. Dugaev , E. Ya. Sherman , J. Barnas

Imprinting magnetism into graphene makes an important step to its applications in spintronics. An actively explored approach is proximity coupling of graphene to a 2D magnet. In these endeavors, the use of epitaxial graphene may bring…

We show theoretically that stimulated spin flip Raman scattering can be used to inject spin currents in doped semiconductors with spin split bands. A pure spin current, where oppositely oriented spins move in opposite directions, can be…

介观与纳米尺度物理 · 物理学 2009-11-11 Ali Najmaie , E. Ya. Sherman , J. E. Sipe

We investigate the spin Seebeck effect and spin pumping in a junction between a ferromagnetic insulator and a magnetic impurity deposited on a normal metal. By the numerical renormalization group calculation, we show that spin current is…

介观与纳米尺度物理 · 物理学 2021-09-15 Tsuyoshi Yamamoto , Takeo Kato , Mamoru Matsuo

Spintronics, which utilizes spin as information carrier, is a promising solution for nonvolatile memory and low-power computing in the post-Moore era. An important challenge is to realize long distance spin transport, together with…

介观与纳米尺度物理 · 物理学 2017-09-20 Li Su , Xiaoyang Lin , Youguang Zhang , Arnaud Bournel , Yue Zhang , Jacques-Olivier Klein , Weisheng Zhao , Albert Fert

A mechanism to generate a spin-polarized current in a two-terminal zigzag silicene nanoribbon is predicted. As a weak local exchange field that is parallel to the surface of silicene is applied on one of edges of the silicene nanoribbon, a…

介观与纳米尺度物理 · 物理学 2012-12-20 Xing-Tao An , Yan-Yang Zhang , Jian-Jun Liu , Shu-Shen Li

We study an adiabatic quantum pump effect in a two terminal graphene device with two oscillating square electric barriers and a stationary magnetic barrier using the scattering matrix approach. The model employs the low-energy Dirac…

介观与纳米尺度物理 · 物理学 2013-05-10 E. Grichuk , E. Manykin

The abilities to inject and detect spin carriers are fundamental for research on transport and manipulation of spin information. Pure electronic spin currents have been recently studied in nanoscale electronic devices using a non-local…

介观与纳米尺度物理 · 物理学 2012-09-25 I. J. Vera-Marun , V. Ranjan , B. J. van Wees

Based on the time-dependent nonequilibrium Green's function method we investigate theoretically the time and spin-dependent transport through a graphene layer upon the application of a static bias voltage to the electrodes and a…

介观与纳米尺度物理 · 物理学 2011-09-23 Kai-He Ding , Zhen-Gang Zhu , Jamal Berakdar

We consider twisted bilayer and trilayer graphene in the presence of Rashba spin-orbit coupling and explore the physics of Moir\'e spintronics. The electronic charge density has a sharp step right at the magic angles $\theta_m$. As a…

介观与纳米尺度物理 · 物理学 2022-08-17 Yshai Avishai , Yehuda Band

Graphene has attracted a great interest in material science due to its novel electronic structrues. Recently, magnetism discovered in graphene based systems opens the possibility of their spintronics application. This paper provides a…

材料科学 · 物理学 2009-09-24 Erjun Kan , Zhenyu Li , Jinlong Yang

In a bilayer of ferromagnetic and non-magnetic metal, spin pumping can be generated by a thermal gradient. The spin current generation depends on the spin mixing conductance of the interface and the magnetic properties of the ferromagnetic…

介观与纳米尺度物理 · 物理学 2022-03-23 Adam B. Cahaya

Engineering topological quantum order has become a major field of physics. Many advances have been made by synthesizing gauge fields in cold atomic systems. Here, we carry over these developments to other platforms which are extremely well…

量子气体 · 物理学 2015-06-17 Tobias Grass , Christine Muschik , Alessio Celi , Ravindra Chhajlany , Maciej Lewenstein

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…

介观与纳米尺度物理 · 物理学 2013-10-10 Chenglong Jia , Jamal Berakdar

Interaction between local magnetization and conduction electrons is responsible for a variety of phenomena in magnetic materials. It has been recently shown that spin current and associated electric voltage can be induced by magnetization…

介观与纳米尺度物理 · 物理学 2018-12-31 Yuta Yamane , Shayan Hemmatiyan , Jun'ichi Ieda , Sadamichi Maekawa , Jairo Sinova

We report a strain-controlled tuning of magnetism in transition-metal-atom-decorated graphene. Our first-principles calculations demonstrate that strain can lead to a sudden change in the magnetic configuration of a transition metal (TM)…

介观与纳米尺度物理 · 物理学 2011-08-09 Bing Huang , Jaejun Yu , Su-Huai Wei