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The transport of spin information has been studied in various materials, such as metals, semiconductors and graphene. In these materials, spin is transported by diffusion of conduction electrons. Here we study the diffusion and relaxation…

Mesoscale and Nanoscale Physics · Physics 2015-12-08 L. J. Cornelissen , J. Liu , R. A. Duine , J. Ben Youssef , B. J. Van Wees

We study electronic transport in graphene/ferromagnetic insulator hybrid devices. The system comprises an armchair graphene nanoribbon with a lens-shaped EuO ferromagnetic insulator layer deposited on top of it. When the device supports a…

Mesoscale and Nanoscale Physics · Physics 2021-02-12 Yuriko Baba , Marta Saiz-Bretín

We investigate spin transport through ferromagnetic graphene vertical heterostructures where a sandwiched tunneling layer is either a normal or ferroelectric insulator. We show that the spin-polarization of the tunneling current is…

Mesoscale and Nanoscale Physics · Physics 2016-05-31 Nojoon Myoung , Hee Chul Park , Seung Joo Lee

Using the fluctuational electrodynamics and nonequilibrium Green's function methods, we demonstrate the existence of a current-induced heat transfer in double-layer graphene even when the temperatures of the two sheets are the same. The…

Mesoscale and Nanoscale Physics · Physics 2019-01-29 Jiebin Peng , Jian-Sheng Wang

We investigate the electromechanical coupling in 2d materials. For non-Bravais lattices, we find important corrections to the standard macroscopic strain - microscopic atomic-displacement theory. We put forward a general and systematic…

Mesoscale and Nanoscale Physics · Physics 2016-02-03 Daniel Midtvedt , Caio H. Lewenkopf , Alexander Croy

Thanks to its intrinsic ability to preserve spin coherence, graphene is a prime material for spintronics. In this review article, we summarize recent achievements related to spintronics in graphene quantum dots and motivate this field from…

Mesoscale and Nanoscale Physics · Physics 2016-01-20 Matthias Droth , Guido Burkard

Spintronics, or spin electronics, is aimed at efficient control and manipulation of spin degrees of freedom in electron systems. To comply with demands of nowaday spintronics, the studies of electron systems hosting giant spin-orbit-split…

Materials Science · Physics 2014-11-05 S. V. Eremeev , I. A. Nechaev , P. M. Echenique , E. V. Chulkov

Graphene in spintronics has so far primarily meant spin current leads of high performance because the intrinsic spin-orbit coupling of its pi-electrons is very weak. If a large spin-orbit coupling could be created by a proximity effect, the…

Materials Science · Physics 2013-05-14 D. Marchenko , A. Varykhalov , M. R. Scholz , G. Bihlmayer , E. I. Rashba , A. Rybkin , A. M. Shikin , O. Rader

We present a comprehensive study of the structural and electronic properties of ultrathin films containing graphene layers synthesized by chemical vapor deposition (CVD) based surface segregation on polycrystalline Ni foils then transferred…

A promising approach to attain long-distance coherent spin propagation is accessing topological spin-polarized edge states in graphene. Achieving this without external magnetic fields necessitates engineering graphene band structure,…

Magnetic skyrmions, vortex-like swirling spin structures with quantized topological number, observed in chiral magnets, are appealing for potential applications in spintronics because it is possible to control their motion with ultralow…

Mesoscale and Nanoscale Physics · Physics 2013-10-08 Junichi Iwasaki , Masahito Mochizuki , Naoto Nagaosa

The ultimate goal of spintronics is achieving electrically controlled coherent manipulation of the electron spin at room temperature to enable devices such as spin field-effect transistors. With conventional materials, coherent spin…

Mesoscale and Nanoscale Physics · Physics 2024-11-01 Josep Ingla-Aynés , Franz Herling , Jaroslav Fabian , Luis E. Hueso , Fèlix Casanova

In a recent paper (JPCM 29, 445302 (2017)) we have studied the effects of mechanical strain and magnetic field on the electronic transport properties in graphene. In this article we extended our work to Weyl semimetals (WSM). We show that…

Mesoscale and Nanoscale Physics · Physics 2018-09-10 Rodrigo Soto-Garrido , Enrique Muñoz

Electron fractionalization into spinons and chargeons plays a crucial role in 2D models of strongly correlated electrons. In this paper we show that spin-charge separation is not a phenomenon confined to lower dimensions but, rather, we…

Strongly Correlated Electrons · Physics 2012-02-01 M. Cristina Diamantini , Carlo A. Trugenberger

We report that the {\pi}-electrons of graphene can be spin-polarized to create a phase with a significant spin-orbit gap at the Dirac point (DP) using a graphene-interfaced topological insulator hybrid material. We have grown epitaxial…

Despite a clear demonstration of bistability in spin-crossover (SCO) materials, the absence of long-range magnetic order and poor electrical conductivity limit their prospect in spintronic and nanoelectronic applications. Intending to…

Quantum confinement endows two-dimensional (2D) layered materials with exceptional physics and novel properties compared to their bulk counterparts. Although certain two- and few-layer configurations of graphene have been realized and…

Graphene has been attracting great interest because of its distinctive band structure and physical properties. Today, graphene is limited to small sizes because it is produced mostly by exfoliating graphite. We grew large-area graphene…

Using the tight-binding approximation and the nonequilibrium Green's function approach, we investigate the coherent spin-dependent transport in planar magnetic junctions consisting of two ferromagnetic (FM) electrodes separated by a…

Mesoscale and Nanoscale Physics · Physics 2009-03-04 Alireza Saffarzadeh , Mahdi Ghorbani Asl

Spatially indirect electron-hole exciton condensates stabilized by interlayer Fock exchange interactions have been predicted in systems containing a pair of two-dimensional semiconductor or semimetal layers separated by a thin tunnel…

Mesoscale and Nanoscale Physics · Physics 2015-12-16 Xuehao Mou , Leonard F. Register , Allan H. MacDonald , Sanjay K. Banerjee