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We study theoretically the properties of buckled graphene-like materials, such as silicene and germanene, in a strong perpendicular magnetic field and a periodic potential. We analyze how the spin-orbit interaction and the perpendicular…

介观与纳米尺度物理 · 物理学 2015-04-09 Vadym M. Apalkov , Tapash Chakraborty

Graphene adsorption on Au(111) surface was explored to identify their common surface structures by means of van der Waals corrected density functional theory calculations. The alignment of graphene in the form of certain rotational angles…

强关联电子 · 物理学 2020-05-13 Merve Yortanlı , Ersen Mete

Graphene has been predicted to develop a magnetic moment by proximity effect when placed on a ferromagnetic film, a promise that could open exciting possibilities in the fields of spintronics and magnetic data recording. In this work, we…

介观与纳米尺度物理 · 物理学 2016-08-01 Luca Pietrobon , Lorenzo Fallarino , Andreas Berger , Andrey Chuvilin , Fèlix Casanova , Luis E. Hueso

The magneto-optical effect breaks time-reversal symmetry, a unique property that makes it indispensable in nonreciprocal optics and topological photonics. Unfortunately, all natural materials have a rather weak magneto-optical response in…

光学 · 物理学 2018-09-24 Lei Ying , Ming Zhou , Xiaoguang Luo , Jingfeng Liu , Zongfu Yu

1-loop quantum corrections are shown to induce large effects on the refraction index $n$ inside a graphene strip in the presence of an external magnetic field $B$ orthogonal to it. To this purpose, we use the tools of Quantum Field Theory…

高能物理 - 唯象学 · 物理学 2014-10-27 Olivier Coquand , Bruno Machet

Magneto-optical transitions between Landau levels can provide precise spectroscopic information on the electronic structure and excitation spectra of graphene, enabling probes of substrate and many-body effects. We calculate the…

介观与纳米尺度物理 · 物理学 2015-09-15 L. A. Chizhova , J. Burgdörfer , F. Libisch

The electromagnetic response of bilayer graphene in a magnetic field is studied in comparison with that of monolayer graphene. Both types of graphene turn out to be qualitatively quite similar in dielectric and screening characteristics,…

介观与纳米尺度物理 · 物理学 2009-11-13 T. Misumi , K. Shizuya

Nonreciprocal devices, including optical isolators, phase shifters, and amplifiers, are pivotal for advanced optical systems. However, exploiting natural materials is challenging due to their weak magneto-optical effects, requiring…

Optical impact on the spin system in a magnetically ordered medium provides a unique possibility for local manipulation of magnetization at subpicosecond time scales that is very promising for magnetic data processing and other magnonics…

Unlike regular electron spin, the pseudospin degeneracy of Fermi points in graphene does not couple directly to magnetic field. Therefore, graphene provides a natural vehicle to observe the integral and fractional quantum Hall physics in an…

强关联电子 · 物理学 2009-11-11 Csaba Toke , Paul E. Lammert , Jainendra K. Jain , Vincent H. Crespi

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

介观与纳米尺度物理 · 物理学 2017-10-11 A. M. Valencia , M. J. Caldas

We model the influence of an in-plane magnetic field on the orbital motion of electrons in rhombohedral graphene multilayers. For zero field, the low-energy band structure includes a pair of flat bands near zero energy which are localized…

介观与纳米尺度物理 · 物理学 2023-09-21 Max Tymczyszyn , Peter H. Cross , Edward McCann

To characterize the possible magnetic structures created on magnetic multilayers a model has been formulated and studied. The interlayer inhomogeneous structures found indicate either (i) a regular periodic, (ii) a quasiperiodic change in…

材料科学 · 物理学 2009-10-31 F. V. Kusmartsev , H. S. Dhillon , M. D. Crapper

We show that the low-energy electronic structure of graphene under a one-dimensional inhomogeneous magnetic field can be mapped into that of graphene under an electric field or vice versa. As a direct application of this transformation, we…

介观与纳米尺度物理 · 物理学 2010-05-31 Liang Zheng Tan , Cheol-Hwan Park , Steven G. Louie

Two-dimensional (2D) materials provide a platform for developing novel spintronic devices and circuits for low-power electronics. In particular, inducing magnetism and injecting spins in graphene have promised the emerging field of graphene…

The indirect exchange interaction between magnetic impurities localized in a graphene plane is considered theoretically, with the influence of intrinsic spin-orbit interaction taken into account. Such an interaction gives rise to an energy…

材料科学 · 物理学 2015-06-25 V. K. Dugaev , V. I. Litvinov , J. Barnas

Reflectance and transmittance of graphene in the optical region are analyzed as a function of frequency, temperature, and carrier density. We show that the optical graphene properties are determined by the direct interband electron…

介观与纳米尺度物理 · 物理学 2009-11-13 L. A. Falkovsky

Ruthenium oxide with the rutile structure is one of example of altermagnets. These systems are characterized by compensated magnetic moments (typical for antiferromagnets) and strong time reversal symmetry breaking (typical for…

材料科学 · 物理学 2023-09-06 Andrzej Ptok

We investigate the magnetoresistance of a side-gated ring structure etched out of single-layer graphene. We observe Aharonov-Bohm oscillations with about 5% visibility. We are able to change the relative phases of the wave functions in the…

介观与纳米尺度物理 · 物理学 2010-05-18 Magdalena Huefner , Françoise Molitor , Arnhild Jacobsen , Alessandro Pioda , Christoph Stampfer , Klaus Ensslin , Thomas Ihn

We study orbital and spin-orbit proximity effects in graphene adsorbed to the Cu(111) surface by means of density functional theory (DFT). The proximity effects are caused mainly by the hybridization of graphene $\pi$ and copper d orbitals.…

介观与纳米尺度物理 · 物理学 2016-04-27 Tobias Frank , Martin Gmitra , Jaroslav Fabian