Showing 2014 · cond-mat.mes-hallShow all

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cond-mat.mes-hall2014★ 79 cited

Synthesized multiwall MoS2 nanotube and nanoribbon field-effect transistors

Sara Fathipour, Maja Remskar, Ana Varlec +8

We report on the fabrication and characterization of synthesized multiwall MoS2 nanotube (NT) and nanoribbon (NR) field-effect transistors (FETs). The MoS2 NTs and NRs were grown b…

cond-mat.mes-hall2014★ 518 cited

Dependence of the Efficiency of Spin Hall Torque on the Transparency of Pt-Ferromagnetic Layer Interfaces

Chi-Feng Pai, Yongxi Ou, D. C. Ralph +1

We report that spin current transport across Pt-ferromagnet (FM) interfaces is strongly dependent on the type and the thickness of the FM layer and on post-deposition processing pr…

cond-mat.mes-hall2014★ 88 cited

Fast Exciton Annihilation by Capture of Electrons or Holes by Defects via Auger Scattering in Monolayer Metal Dichalcogenides

Haining Wang, Jared H. Strait, Changjian Zhang +4

The strong Coulomb interactions and the small exciton radii in two-dimensional metal dichalcogenides can result in very fast capture of electrons and holes of excitons by mid-gap d…

cond-mat.mes-hall2014★ 648 cited

Ultrafast Dynamics of Defect-Assisted Electron-Hole Recombination in Monolayer MoS2

Haining Wang, Changjian Zhang, Farhan Rana

In this letter, we present non-degenerate ultrafast optical pump-probe studies of the carrier recombination dynamics in MoS monolayers. By tuning the probe to wavelengths muc…

cond-mat.mes-hall2014★ 218 cited

Radiative Lifetimes of Excitons and Trions in Monolayers of Metal Dichalcogenide MoS2

Haining Wang, Changjian Zhang, Weimin Chan +3

We present results on the radiative lifetimes of excitons and trions in a monolayer of metal dichalcogenide MoS2. The small exciton radius and the large exciton optical oscillator…

cond-mat.mes-hall2014★ 14 cited

Coupling of Plasmon Modes in Graphene Microstructures

Parinita Nene, Jared H. Strait, Wei-Min Chan +5

A variety of different graphene plasmonic structures and devices have been proposed and demonstrated experimentally. Plasmon modes in graphene microstructures interact strongly via…

cond-mat.mes-hall2014

Evanescent field optical readout of graphene mechanical motion at room temperature

Robin M. Cole, George A. Brawley, Vivek P. Adiga +5

Graphene mechanical resonators have recently attracted considerable attention for use in precision force and mass sensing applications. To date, readout of their oscillatory motion…

cond-mat.mes-hall2014★ 3 cited

Range separated hybrid density functional study of organic dye sensitizers on anatase TiO nanowires

Hatice Unal, Deniz Gunceler, Oguz Gulseren +2

The adsorption of organic molecules coumarin and the donor--acceptor type tetrahydroquinoline (C2-1) on anatase (101) and (001) nanowires have been investigated using screened C…

cond-mat.mes-hall2014★ 762 cited

Breaking of valley degeneracy by magnetic field in monolayer MoSe2

David MacNeill, Colin Heikes, Kin Fai Mak +5

Using polarization-resolved photoluminescence spectroscopy, we investigate valley degeneracy breaking by out-of-plane magnetic field in back-gated monolayer MoSe devices. We ob…

cond-mat.mes-hall2014★ 16 cited

Solid argon as a possible substrate for quasi-freestanding silicene

S. Sattar, R. Hoffmann, U. Schwingenschlögl

We study the structural and electronic properties of silicene on solid Ar(111) substrate using ab-initio calculations. We demonstrate that due to weak interaction quasi-freestandin…

cond-mat.mes-hall2014★ 1.9k cited

The Valley Hall Effect in MoS2 Transistors

Kin Fai Mak, Kathryn L. McGill, Jiwoong Park +1

Electrons in 2-dimensional crystals with a honeycomb lattice structure possess a new valley degree of freedom (DOF) in addition to charge and spin. Each valley is predicted to exhi…

cond-mat.mes-hall2014★ 1.5k cited

Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3

A. R. Mellnik, J. S. Lee, A. Richardella +8

Magnetic devices are a leading contender for implementing memory and logic technologies that are nonvolatile, that can scale to high density and high speed, and that do not suffer…

cond-mat.mes-hall2014★ 284 cited

Absorption of Light by Excitons and Trions in Monolayers of Metal Dichalcogenide MoS: Experiments and Theory

Changjian Zhang, Haining Wang, Weimin Chan +2

We measure the optical absorption spectra and optical conductivities of excitons and trions in monolayers of metal dichalcogenide MoS and compare the results with theoretical…

cond-mat.mes-hall2014★ 26 cited

New Mechanism for Strongly Bound Excitons in Gapless Two-Dimensional Structures

Yufeng Liang, Ryan Soklaski, Shouting Huang +4

Common wisdom asserts that bound excitons cannot form in high-dimensional (d>1) metallic structures because of their overwhelming screening and unavoidable resonance with nearby co…

cond-mat.mes-hall2014★ 14 cited

Effects of surface-bulk hybridization in 3D topological `metals'

Yi-Ting Hsu, Mark H. Fischer, Taylor L. Hughes +2

Identifying the effects of surface-bulk coupling is a key challenge towards exploiting the topological nature of the surface states in many available three-dimensional topological…