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Both experimental and theoretical studies of the magnetic properties of micrographite and nanographite indicate a crucial role of the partial oxidation of graphitic zigzag edges in ferromagnetism. In contrast to total and partial…

介观与纳米尺度物理 · 物理学 2011-06-29 D. W. Boukhvalov , S. Moehlecke , R. R. da Silva , Y. Kopelevich

Magnetic recording using circularly polarized femto-second laser pulses is an emerging technology that would allow write speeds much faster than existing field driven methods. However, the mechanism that drives the magnetization switching…

介观与纳米尺度物理 · 物理学 2017-06-19 Matthew O. A. Ellis , Eric E. Fullerton , Roy W. Chantrell

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

Magnetic properties of a single vacancy in graphene is a relevant and still much discussed problem. The experimental results point to a clearly detectable magnetic defect state at the Fermi energy, while calculations based on density…

介观与纳米尺度物理 · 物理学 2017-10-31 Ana M. Valencia , Marilia J. Caldas

We find experimentally that the optical sheet conductance of graphite per graphene layer is very close to $(\pi/2)e^2/h$, which is the theoretically expected value of dynamical conductance of isolated monolayer graphene. Our calculations…

强关联电子 · 物理学 2009-11-13 A. B. Kuzmenko , E. van Heumen , F. Carbone , D. van der Marel

The effect of magnetic domain boundaries displacement induced by electric field is observed in epitaxial ferrite garnet films (on substrates with the (210) crystallographic orientation). The effect is odd with respect to the electric field…

材料科学 · 物理学 2008-01-29 A. S. Logginov , G. A. Meshkov , V. A. Nikolaev , A. P. Pyatakov , A. K. Zvezdin

We demonstrate the anomalous Hall effect (AHE) in single-layer graphene exchange-coupled to an atomically flat yttrium iron garnet (YIG) ferromagnetic thin film. The anomalous Hall conductance has magnitude of ~0.09(2e2/h) at low…

介观与纳米尺度物理 · 物理学 2015-06-23 Zhiyong Wang , Chi Tang , Raymond Sachs , Yafis Barlas , Jing Shi

Rotating bodies in General Relativity produce frame dragging, also known as the {\it gravitomagnetic effect} in analogy with classical electromagnetism. In this work, we study the effect of magnetic field on the gravitomagnetic effect in…

高能天体物理现象 · 物理学 2017-01-31 Debarati Chatterjee , Chandrachur Chakraborty , Debades Bandyopadhyay

Carbon-based nanostructures and graphene, in particular, evoke a lot of interest as new promising materials for nanoelectronics and spintronics. One of the most important issue in this context is the impact of external electrodes on…

介观与纳米尺度物理 · 物理学 2012-03-16 S. Krompiewski

Spin, anomalous, and valley Hall effects in graphene-based hybrid structures are studied theoretically within the Green function formalism and linear response theory. Two different types of hybrid systems are considered in detail: (i)…

介观与纳米尺度物理 · 物理学 2017-05-10 A. Dyrdał , J. Barnaś

Spontaneous intervalley coherence is suspected in several different graphene multilayer systems, but is difficult to confirm because of a paucity of convenient experimental signatures. Here we suggest that magneto-conductance features…

介观与纳米尺度物理 · 物理学 2023-12-19 Nemin Wei , Yongxin Zeng , A. H. MacDonald

Magneto-Raman scattering experiments from the surface of graphite reveal novel features associated to purely electronic excitations which are observed in addition to phonon-mediated resonances. Graphene-like and graphite domains are…

介观与纳米尺度物理 · 物理学 2015-05-27 C. Faugeras , M. Amado , P. Kossacki , M. Orlita , M. Kühne , A. A. L. Nicolet , Yu. I. Latyshev , M. Potemski

The conditions for spontaneous magnetization in a single graphene sheet are discussed in the context of Mermin-Wagner theorem. It is rigorously proved that at any nonzero temperature the graphene monolayer is nonmagnetic as long as its…

介观与纳米尺度物理 · 物理学 2012-11-08 L. Wojtczak

The proximity-induced couplings in graphene due to the vicinity of a ferromagnetic insulator are analyzed. We combine general symmetry principles and simple tight-binding descriptions to consider different orientations of the magnetization.…

介观与纳米尺度物理 · 物理学 2019-10-15 Vo Tien Phong , Niels R. Walet , Francisco Guinea

We show that the type of charge carrier scattering significantly affects the high-field magnetoresistance of graphene nanoribbons. This effect has potential to be used in identifying the scattering mechanisms in graphene. The results also…

介观与纳米尺度物理 · 物理学 2012-12-04 Andreas Uppstu , Ari Harju

We revisit polarization rotation due to gravity, known as the gravitational Faraday effect, with a view on its role in quantum communications with Earth-orbiting satellites. In a static spherically symmetric gravitational field Faraday…

广义相对论与量子宇宙学 · 物理学 2021-11-01 Pravin Kumar Dahal , Daniel R. Terno

We show that in graphene epitaxially grown on SiC the Drude absorption is transformed into a strong terahertz plasmonic peak due to natural nanoscale inhomogeneities, such as substrate terraces and wrinkles. The excitation of the plasmon…

强关联电子 · 物理学 2012-05-17 I. Crassee , M. Orlita , M. Potemski , A. L. Walter , M. Ostler , Th. Seyller , I. Gaponenko , J. Chen , A. B. Kuzmenko

We study the effect of pressure on the localized magnetic moments induced by vacancies in bilayer graphene in the presence of topological defects breaking the bipartite nature of the lattice. By using a mean-field Hubbard model we address…

材料科学 · 物理学 2015-05-28 Eduardo V. Castro , María P. López-Sancho , María A. H. Vozmediano

We study electronic properties of graphene with finite concentration of vacancies or other resonant scatterers by a straightforward lattice Quantum Monte Carlo calculations. Taking into account realistic long-range Coulomb interaction we…

强关联电子 · 物理学 2015-06-24 M. V. Ulybyshev , M. I. Katsnelson

Few-layer graphene deposited on semiconductor nanorods separated by undoped spacers has been studied in perspective for the fabrication of stable nanoresonators. We show that an applied bias between the graphene layer and the nanorod…