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We study theoretically nonlocal spin transport in a ballistic carbon nanotube contacted to two ferromagnetic leads and two normal-metal leads. When the magnetizations of the two ferromagnets are changed from a parallel to an antiparallel…

介观与纳米尺度物理 · 物理学 2009-03-24 Audrey Cottet , Chéryl Feuillet-Palma , Takis Kontos

The physics in flat bands has emerged as an essential field in condensed matter physics where a plethora of phenomena can be unveiled, such as anomalous transport properties, superconductivity dominated by quantum geometry or exotic…

其他凝聚态物理 · 物理学 2026-03-02 Biplab Pal , Maxime Thumin , Georges Bouzerar

Graphene has been identified as a promising material with numerous applications, particularly in spintronics. In this paper we investigate the peculiar features of spin excitations of magnetic units deposited on graphene nanoribbons and how…

介观与纳米尺度物理 · 物理学 2016-12-28 F. S. M. Guimarães , J. Duffy , A. T. Costa , R. B. Muniz , M. S. Ferreira

Understanding the magnetic properties of graphenic nanostructures is instrumental in future spintronics applications. These magnetic properties are known to depend crucially on the presence of defects. Here we review our recent theoretical…

介观与纳米尺度物理 · 物理学 2013-04-02 Elton J. G. Santos , Andres Ayuela , Daniel Sanchez-Portal

We study the Ruderman-Kittel-Kasuya-Yosida interaction between magnetic impurities embedded in $p$-doped transition metal dichalcogenide triangular flakes. The role of underlying symmetries is exposed by analyzing the interaction as a…

介观与纳米尺度物理 · 物理学 2016-12-26 Oscar Ávalos-Ovando , Diego Mastrogiuseppe , Sergio E. Ulloa

We address spin dependent transport through an array of diamonds in the presence of Rashba spin-orbit (SO) interaction where each diamond plaquette is penetrated by an Aharonov-Bohm (AB) flux $\phi$. The diamond chain is attached…

介观与纳米尺度物理 · 物理学 2011-01-21 Moumita Dey , Santanu K. Maiti , S. N. Karmakar

Electronic structure and magnetic interactions of a Tb adatom on graphene are investigated from first principles using combination of density functional theory and multiconfigurational quantum chemistry techniques including spin-orbit…

材料科学 · 物理学 2024-09-13 Monirul Shaikh , Alison Klein , Aleksander L. Wysocki

Topological surface states of three-dimensional topological insulator nanoribbons and their distinct magnetoconductance properties are promising for topoelectronic applications and topological quantum computation. A crucial building block…

The electronic properties of graphene decorated with Ni, Co, Cu and Zn adatoms is studied with the density functional theory approach. Within the analysis the spin-orbit interaction is taken into account. We focus on the case when the…

应用物理 · 物理学 2019-03-01 Malgorzata Wawrzyniak-Adamczewska

We implement a self-consistent Hartree-Fock approximation based on a microscopic model in real space, which allows us to consider the interplay between the Hubbard and the extended Coulomb interaction in twisted bilayer graphene at the…

介观与纳米尺度物理 · 物理学 2021-09-15 J. Gonzalez , T. Stauber

The unusual band structure of carbon nanotubes (CNs) results in their remarkable magnetic properties. The application of magnetic field parallel to the tube axis can change the conducting properties of the CN from metallic to semiconducting…

介观与纳米尺度物理 · 物理学 2009-11-11 Magdalena Marganska , Marek Szopa , Elzbieta Zipper

We propose an electronic L\'evy glass built from graphene nanoribbons in the presence of regions with enhanced spin-orbit coupling. Although electrons in graphene nanoribbons present a low spin-orbit coupling strength, it can be increased…

介观与纳米尺度物理 · 物理学 2026-05-15 Diego B. Fonseca , Anderson L. R. Barbosa , Luiz Felipe C. Pereira

We analytically calculate the nuclear-spin interactions of a single electron confined to a carbon nanotube or graphene quantum dot. While the conduction-band states in graphene are p-type, the accordant states in a carbon nanotube are…

介观与纳米尺度物理 · 物理学 2009-10-02 Jan Fischer , Bjoern Trauzettel , Daniel Loss

Using the non-equilibrium Green\noindent 's function method and the Keldysh formalism, we study the effects of spin-orbit interactions and time-reversal symmetry breaking exchange fields on non-equilibrium quantum transport in graphene…

介观与纳米尺度物理 · 物理学 2018-07-19 Nezhat Pournaghavi , Cecilia Holmqvist , Anna Pertsova , Carlo Canali

The Hamiltonian for nanocones with curvature induced spin orbit coupling have been derived. The effect of curvature induced spin orbit coupling on the electronic properties of graphitic nanocones is considered. Energy spectra for different…

介观与纳米尺度物理 · 物理学 2015-11-10 R. Pincak , J. Smotlacha , M. Pudlak

Towards spin selective electronics made of three coordinated carbon atoms, here we computationally propose robust and reversibly bias driven evolution of pristine undoped graphene nano-ribbons(GNR) into ferromagnetic-semiconductor, metal or…

介观与纳米尺度物理 · 物理学 2017-08-08 Rita Maji , Joydeep Bhattacharjee

In the presence of the Hubbard interaction, graphene zigzag nanoribbons have spontaneous edge magnetism with anti-parallel configuration, whose amplitude can be tuned by a transversal electric field. As the electric field increases or…

介观与纳米尺度物理 · 物理学 2021-07-07 Ma Luo

Armchair graphene nanoribbons with different proportions of edge oxygen atoms are investigated by using crystal orbital method based on density functional theory. All the nanoribbons are energetically favorable, although buckled edges are…

材料科学 · 物理学 2014-11-07 Hongyu Ge , Guo Wang , Yi Liao

For a system of two spatially separated monoatomic graphene layers encapsulated in hexagonal boron nitride, we consider the drag effect between charge carriers in the Fermi liquid regime. Commonly, the phenomenon is described in terms of an…

介观与纳米尺度物理 · 物理学 2012-10-02 Bruno Amorim , Jürgen Schiefele , Fernando Sols , Francisco Guinea

Spin-orbital interactions (SOI) in silicene results in the quantum spin Hall effect, while the Hubbard-induced Coulomb interaction in zigzag nanoribbons often generates a band gap with the anti-ferromagnetic (AF) spin orders on two edges.…

介观与纳米尺度物理 · 物理学 2018-04-13 Xiao Long Lv , Yang Xie , Hang Xie