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Suspended carbon nanotubes are known to support self-driven oscillations due to electromechanical feedback under certain conditions, including low temperatures and high mechanical quality factors. Prior reports identified signatures of such…

Mesoscale and Nanoscale Physics · Physics 2020-07-28 Kyle Willick , Jonathan Baugh

We study the effects of spin transfer on thermally activated dynamics of magnetic nanopillars with identical thicknesses of the magnetic layers. The symmetric nanopillars exhibit anomalous dependencies of switching statistics on magnetic…

Materials Science · Physics 2009-11-13 Weng L. Lim , Nicholas Anthony , Andrew Higgins , Sergei Urazhdin

Magnon spintronics is a prosperous field that promises beyond-CMOS technology based on elementary excitations of the magnetic order that act as information carriers for future computational architectures. Unidirectional propagation of spin…

The rapidly expanding research in Spintronics, the electronics utilizing the electron spin instead of its charge, is driven by the very interesting potential applications. The actual task is to develop principles for the spin manipulations…

Materials Science · Physics 2009-11-10 A. V. Scherbakov , A. V. Akimov , D. R. Yakovlev , W. Ossau , L. Hansen , A. Waag , L. W. Molenkamp

A theory of a thermally induced single-electron "shuttling" instability in a magnetic nanomechanical device subject to an external magnetic field is presented in the Coulomb blockade regime of electron transport. The model magnetic shuttle…

Mesoscale and Nanoscale Physics · Physics 2018-08-01 O. A. Ilinskaya , S. I. Kulinich , I. V. Krive , R. I. Shekhter , H. C. Park , M. Jonson

Spin torque and spin Hall effect nanooscillators generate high intensity spin wave auto oscillations on the nanoscale enabling novel microwave applications in spintronics, magnonics, and neuromorphic computing. For their operation, these…

Mesoscale and Nanoscale Physics · Physics 2019-06-19 M. Haidar , A. A. Awad , M. Dvornik , R. Khymyn , A. Houshang , J. Akerman

When a local and attractive potential is quenched in a nanowire, the spectrum changes its topology from a purely continuum to a continuum and discrete portion. We show that, under appropriate conditions, this quench leads to stable coherent…

Mesoscale and Nanoscale Physics · Physics 2019-10-30 F. Cavaliere , N. Traverso Ziani , F. Dolcini , M. Sassetti , F. Rossi

Through detailed experimental studies of the angular dependence of spin wave excitations in nanocontact-based spin-torque oscillators, we demonstrate that two distinct spin wave modes can be excited, with different frequency, threshold…

Solution of the Dirac equation predicts that when an electron with non-zero orbital angular momentum propagates in a cylindrically symmetric potential, its spin and orbital degrees of freedom interact, causing the electron's phase velocity…

Quantum Physics · Physics 2009-09-23 C. C. Leary , D. Reeb , M. G. Raymer

Hysteretic switching in the magnetoresistance of short-channel, ferromagnetically contacted individual single wall carbon nanotubes is observed, providing strong evidence for nanotube spin transport. By varying the voltage on a capacitively…

Mesoscale and Nanoscale Physics · Physics 2016-08-31 Bhaskar Nagabhirava , Tanesh Bansal , Gamini Sumanasekera , Lei Liu , Bruce W. Alphenaar

Spin-charge states of correlated electrons in a one-dimensional quantum dot attached to interacting leads are studied in the non-linear transport regime. With non-symmetric tunnel barriers, regions of negative differential conductance…

Strongly Correlated Electrons · Physics 2011-10-10 F. Cavaliere , A. Braggio , J. T. Stockburger , M. Sassetti , B. Kramer

The dynamic interplay of transport, electrostatic, and magnetic effects in the resonant tunneling through ferromagnetic quantum wells is theoretically investigated. It is shown that the carrier-mediated magnetic order in the ferromagnetic…

Mesoscale and Nanoscale Physics · Physics 2008-08-13 Christian Ertler , Jaroslav Fabian

We theoretically investigate the electro-mechanics of a Suspended Carbon Nanotube with a Deflection Sensitive Resistance subjected to a homogeneous Magnetic Field and a constant Voltage Bias. We show that, (with the exception of a singular…

Mesoscale and Nanoscale Physics · Physics 2012-04-25 Anders Nordenfelt

We develop a theory for spin transport and magnetization dynamics in a quantum-dot spin valve, i.e., two magnetic reservoirs coupled to a quantum dot. Our theory is able to take into account effects of strong correlations. We demonstrate…

Mesoscale and Nanoscale Physics · Physics 2018-01-09 N. M. Gergs , S. A. Bender , R. A. Duine , D. Schuricht

Magnetic skyrmions, as a whirling spin texture with axisymmetry, cannot be propelled by a uniform magnetic field. Therefore, reported skyrmion motions have been induced using other sorts of stimuli; typically, electric currents in magnetic…

Mesoscale and Nanoscale Physics · Physics 2022-10-18 Xiangjun Xing , Yan Zhou

Scattering of electrons by localized spins is the ultimate process enabling electrical detection and control of the magnetic state of a spin-doped material. At the molecular scale, this scattering is mediated by the electronic orbitals…

Magnetic ferroelectrics or multiferroics, which are currently extensively explored, may provide a good arena to realize a novel magnetoelectric function. Here we demonstrate the genuine electric control of the spiral magnetic structure in…

Strongly Correlated Electrons · Physics 2009-11-13 Y. Yamasaki , H. Sagayama , T. Goto , M. Matsuura , K. Hirota , T. Arima , Y. Tokura

Tunnel transport of interacting spin-polarized electrons through a single-level vibrating quantum dot in external magnetic field is studied. By using density matrix method, the current-voltage characteristics and the dependence of…

Mesoscale and Nanoscale Physics · Physics 2021-03-23 A. D. Shkop , O. M. Bahrova , S. I. Kulinich , I. V. Krive

We propose a new mechanism and a related device concept for a robust, magnetic field tunable radio-frequency (rf) oscillator using the self oscillation of a magnetic domain wall subject to a uniform static magnetic field and a spatially…

Mesoscale and Nanoscale Physics · Physics 2015-10-06 Sanchar Sharma , Bhaskaran Muralidharan , Ashwin Tulapurkar

Magnetic skyrmions are vortex-like, swirls of magnetisation whose topological protection and particle-like nature have suggested them to be suitable for a number of novel spintronic devices. One such application is skyrmionic computing,…

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