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Showing 2010 · cond-mat.mes-hallShow all

16 papers · 2 filters

cond-mat.mes-hall2010★ 49 cited

Strong gate coupling of high-Q nanomechanical resonators

Jaakko Sulkko, Mika A. Sillanpää, Pasi Häkkinen +5

The detection of mechanical vibrations near the quantum limit is a formidable challenge since the displacement becomes vanishingly small when the number of phonon quanta tends towa…

cond-mat.mes-hall2010★ 1.8k cited

Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect

Luqiao Liu, Takahiro Moriyama, D. C. Ralph +1

We demonstrate that the spin Hall effect in a thin film with strong spin-orbit scattering can excite magnetic precession in an adjacent ferromagnetic film. The flow of alternating…

cond-mat.mes-hall2010★ 134 cited

Electronic states and optical properties of PbSe nanorods and nanowires

A. C. Bartnik, Al. L. Efros, W. -K. Koh +2

A theory of the electronic structure and excitonic absorption spectra of PbS and PbSe nanowires and nanorods in the framework of a four-band effective mass model is presented. Calc…

cond-mat.mes-hall2010★ 97 cited

High-Q Nanomechanics via Destructive Interference of Elastic Waves

I. Wilson-Rae, R. A. Barton, S. S. Verbridge +4

Mechanical dissipation poses an ubiquitous challenge to the performance of nanomechanical devices. Here we analyze the support-induced dissipation of high-stress nanomechanical res…

cond-mat.mes-hall2010★ 114 cited

Time-resolved detection of spin-transfer-driven ferromagnetic resonance and spin torque measurement in magnetic tunnel junctions

Chen Wang, Yong-Tao Cui, Jordan A. Katine +2

Several experimental techniques have been introduced in recent years in attempts to measure spin transfer torque in magnetic tunnel junctions (MTJs). The dependence of spin torque…

cond-mat.mes-hall2010★ 41 cited

Andreev reflection at half-metal-superconductor interfaces with non-uniform magnetization

Joern N. Kupferschmidt, Piet W. Brouwer

Andreev reflection at the interface between a half-metallic ferromagnet and a spin-singlet superconductor is possible only if it is accompanied by a spin flip. Here we calculate th…

cond-mat.mes-hall2010★ 70 cited

Ultrafast Carrier Recombination and Generation Rates for Plasmon Emission and Absorption in Graphene

Farhan Rana, Jared H. Strait, Haining Wang +1

Electron-hole generation and recombination rates for plasmon emission and absorption in Graphene are presented. The recombination times of carriers due to plasmon emission have bee…

cond-mat.mes-hall2010★ 84 cited

Electronic States of Graphene Grain Boundaries

Andrej Mesaros, Stefanos Papanikolaou, C. F. J. Flipse +2

We introduce a model for amorphous grain boundaries in graphene, and find that stable structures can exist along the boundary that are responsible for local density of states enhan…

cond-mat.mes-hall2010★ 10 cited

Straining the Identity of Majorana Fermions

Andrej Mesaros, Stefanos Papanikolaou, Jan Zaanen

We propose an experimental setup of an interferometer for the observation of neutral Majorana fermions on topological insulator - superconductor - ferromagnet junctions. We show th…

cond-mat.mes-hall2010★ 143 cited

First-principles study of heat transport properties of graphene nanoribbons

Zhen Wah Tan, Jian-Sheng Wang, Chee Kwan Gan

We combine density-functional theory and the nonequilibrium Green's function method to study the thermal conductance of graphene nanoribbons with armchair and zigzag edges. Zigzag…

cond-mat.mes-hall2010★ 522 cited

Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect

J. J. Parks, A. R. Champagne, T. A. Costi +10

The ability to make electrical contact to single molecules creates opportunities to examine fundamental processes governing electron flow on the smallest possible length scales. We…

cond-mat.mes-hall2010★ 44 cited

Dirac Spectrum in Piecewise Constant One-Dimensional Potentials

D. P. Arovas, L. Brey, H. A. Fertig +2

We study the electronic states of graphene in piecewise constant potentials using the continuum Dirac equation appropriate at low energies, and a transfer matrix method. For superl…

cond-mat.mes-hall2010★ 29 cited

Spin-torque driven magnetic vortex self-oscillations in perpendicular magnetic fields

G. Finocchio, V. S. Pribiag, L. Torres +2

We have employed complete micromagnetic simulations to analyze dc current driven self-oscillations of a vortex core in a spin-valve nanopillar in a perpendicular field by including…

cond-mat.mes-hall2010★ 51 cited

Absence of a metallic phase in charge-neutral graphene with a random gap

J. H. Bardarson, M. V. Medvedyeva, J. Tworzydlo +2

It is known that fluctuations in the electrostatic potential allow for metallic conduction (nonzero conductivity in the limit of an infinite system) if the carriers form a single s…

cond-mat.mes-hall2010★ 14 cited

Material limitations of carbon-nanotube inertial balances: on the possibility of intrinsic yoctogram mass resolution at room temperature

Johannes Lischner, T. A. Arias

We present a theoretical study of the intrinsic quality factor of the fundamental flexural vibration in a carbon nanotube and its dependence on temperature, radius, length and tens…

cond-mat.mes-hall2010★ 43 cited

Tuning mechanical modes and influence of charge screening in nanowire resonators

Hari S. Solanki, Shamashis Sengupta, Sajal Dhara +6

We probe electro-mechanical properties of InAs nanowire (diameter ~ 100 nm) resonators where the suspended nanowire (NW) is also the active channel of a field effect transistor (FE…