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We present first-principles calculations of the electronic band structure and spin-orbit effects in graphene functionalized with methyl molecules in dense and dilute limits. The dense limit is represented by a 2$\times$2 graphene supercell…

Mesoscale and Nanoscale Physics · Physics 2016-01-27 Klaus Zollner , Tobias Frank , Susanne Irmer , Martin Gmitra , Denis Kochan , Jaroslav Fabian

Electronic carriers in graphene show a high carrier mobility at room temperature. Thus, this system is widely viewed as a potential future charge-based high-speed electronic-material to complement- or replace- silicon. At the same time, the…

Mesoscale and Nanoscale Physics · Physics 2012-12-04 R. G. Mani , J. Hankinson , C. Berger , W. A. de Heer

The development of a spintronics device relies on efficient generation of spin polarized currents and their electric field controlled manipulation. While observation of exceptionally long spin relaxation lengths make graphene an intriguing…

The complex investigation of dc transport and magnetic properties of the epitaxial manganite/iridate heterostructure was carried out by mean of X-ray (XRD), dc resistance measurements, ferromagnetic resonance (FMR) and polarized neutron…

Mesoscale and Nanoscale Physics · Physics 2020-10-07 G. A. Ovsyannikov , T. A Shaikhulov , V. V. Demidov , K. L. Stankevich , Yu. Khaydukov , N. V. Andreev

The electrical resistivity measurements in the magnetic field are carried out on the pressure-induced superconductor UGe$_2$. The superconductivity is observed from 1.06 to 1.44 GPa. The upper critical field of $H_{C2}$ is anisotropic where…

Condensed Matter · Physics 2009-11-07 T. C. Kobayashi , K. Hanazono , N. Tateiwa , K. Amaya , Y. Haga , R. Settai , Y. Onuki

We present ab initio many-body calculations of the optical absorption in bulk graphite, graphene and bilayer of graphene. Electron-hole interaction is included solving the Bethe-Salpeter equation on top of a GW quasiparticle electronic…

Materials Science · Physics 2015-05-14 Paolo E. Trevisanutto , Markus Holzmann , Michel Cote , Valerio Olevano

We predict "intrinsic" spin relaxation times ($T_{1}$) of graphite due to spin-orbit-phonon interaction, i.e., the combination of spin-orbit coupling and electron-phonon interaction, using our developed first-principles density-matrix…

Computational Physics · Physics 2024-08-23 Junqing Xu

Measurements of the magnetoresistivity of graphite with a high degree of control of the angle between the sample and magnetic field indicate that the metal-insulator transition (MIT), shown to be induced by a magnetic field applied…

Strongly Correlated Electrons · Physics 2009-11-07 H. Kempa , H. C. Semmelhack , P. Esquinazi , Y. Kopelevich

We present results from numerical simulations of the interaction of internal gravity waves (IGW) with magnetic fields in the radiative interior of the Sun. In this second paper, the waves are forced self-consistently by an overlying…

Solar and Stellar Astrophysics · Physics 2015-05-20 T. M. Rogers , K. B. MacGregor

Magnetic proximity effects in Co/hBN/graphene heterostructures are systematically analyzed via first-principles calculations, demonstrating a pronounced localized spatial variation of the induced spin polarization of graphene's Dirac…

Mesoscale and Nanoscale Physics · Physics 2026-01-13 Klaus Zollner , Lukas Cvitkovich , Riccardo Silvioli , Andreas V. Stier , Jaroslav Fabian

The hyperfine structure of the ground state of erbium doped yttrium orthosilicate is analyzed with the use of electron paramagnetic resonance experiments in a tunable microwave resonator. This work was prompted by the disagreement between…

We provide evidence that proton irradiation of energy 2.25 MeV on highly-oriented pyrolytic graphite samples triggers ferro- or ferrimagnetism. Measurements performed with a superconducting quantum interferometer device (SQUID) and magnetic…

Strongly Correlated Electrons · Physics 2007-05-23 P. Esquinazi , D. Spemann , R. Höhne , A. Setzer , K. -H. Han , T. Butz

In this study, novel use of the electromagnetic field profile of a localized spoof surface plasmonic mode to detect electron spin resonance is being reported. The mode is supported on a resonator with a complementary metallic spiral…

Applied Physics · Physics 2021-05-04 Subhadip Roy , Anuvab Nandi , Pronoy Das , Chiranjib Mitra

We demonstrate that the spin-polarized electron current can interact with a microwave electric field in a resonant manner. The spin-orbit interaction gives rise to an effective magnetic field proportional to the electric current. In the…

Materials Science · Physics 2009-11-10 B. A. Glavin , K. W. Kim

Coherent coupling of Dirac fermion magneto-excitons with an optical phonon is observed in graphite as marked magnetic-field dependent splittings and anti-crossing behavior of the two coupled modes. The sharp magneto-phonon resonance occurs…

Materials Science · Physics 2015-05-19 J. Yan , S. Goler , T. D. Rhone , M. Han , R. He , P. Kim , V. Pellegrini , A. Pinczuk

We have previously found experimental evidence for several quantum phenomena in oxygen-ion implanted of hydrogenated graphite: ferromagnetism, antiferromagnetism, paramagentism, triplet superconductivity, Andreev states, Little-Parks…

Superconductivity · Physics 2023-11-23 Nadina Gheorghiu , Charles R. Ebbing , Timothy J. Haugan

We report $\beta$-detected nuclear magnetic resonance of ultra-dilute $^{8}$Li$^{+}$ implanted in highly oriented pyrolytic graphite (HOPG). The absence of motional narrowing and diffusional spin-lattice relaxation implies Li$^+$ is not…

Recently, there have appeared theoretical works on the magnetic properties of graphene and graphene nanoribbons envisaging possible spin-based applications along with fundamental scientific insight. The theoretical efforts, however, appear…

Mesoscale and Nanoscale Physics · Physics 2010-06-25 S. S. Rao , A. Stesmans , Y. Wang , Y. Chen

We report electrically detected magnetic resonance of phosphorus donors in a silicon field-effect transistor. An on-chip transmission line is used to generate the oscillating magnetic field allowing broadband operation. At milli-kelvin…

Materials Science · Physics 2008-08-23 L. H. Willems van Beveren , H. Huebl , D. R. McCamey , T. Duty , A. J. Ferguson , R. G. Clark , M. S. Brandt

Graphene consists in a single-layer carbon crystal where 2$p_z$ electrons display a linear dispersion relation in the vicinity of the Fermi level, conveniently described by a massless Dirac equation in $2+1$ spacetime. Spin-orbit effects…

Mesoscale and Nanoscale Physics · Physics 2017-04-04 B. Berche , F. Mireles , E. Medina