output
19922026
Showing 2012 · cond-mat.mes-hallShow all

15 papers · 2 filters

cond-mat.mes-hall2012★ 33 cited

Measurement of Filling-Factor-Dependent Magnetophonon Resonances in Graphene Using Raman Spectroscopy

Y. Kim, J. M. Poumirol, A. Lombardo +9

We perform polarization-resolved Raman spectroscopy on graphene in magnetic fields up to 45T. This reveals a filling-factor-dependent, multi-component anticrossing structure of the…

cond-mat.mes-hall2012★ 63 cited

Fundamental Optical Processes in Armchair Carbon Nanotubes

E. H. Haroz, J. G. Duque, X. Tu +5

We have used post-synthesis separation methods based on density gradient ultracentrifugation and DNA-based ion-exchange chromatography to produce aqueous suspensions strongly enric…

cond-mat.mes-hall2012★ 697 cited

A topological crystalline insulator (TCI) phase via topological phase transition and crystalline mirror symmetry

Su-Yang Xu, Chang Liu, Nasser Alidoust +18

A Z2 topological insulator protected by time-reversal symmetry is realized via spin-orbit interaction driven band inversion. For example, the topological phase in the Bi-Sb system…

cond-mat.mes-hall2012

Inelastic electron and Raman scattering from the collective excitations in quantum wires: Zero magnetic field

Manvir S. Kushwaha

The nanofabrication technology has taught us that an -dimensional confining potential imposed upon an -dimensional electron gas paves the way to a quasi-()-dimensional e…

cond-mat.mes-hall2012★ 59 cited

Catalytic sub-surface etching of nanoscale channels in graphite

Maya Lukas, Velimir Meded, Aravind Vijayaraghavan +5

Catalytic hydrogenation of graphite has recently attracted renewed attention, as a route for nano-patterning of graphene and to produce graphene nano-ribbons. These reports show th…

cond-mat.mes-hall2012★ 34 cited

Excess noise in scanning tunneling microscope-style break junctions at room temperature

Ruoyu Chen, Patrick Wheeler, D. Natelson

Current noise in nanoscale systems provides additional information beyond the electronic conductance. We report measurements at room temperature of the nonequilibrium "excess" nois…

cond-mat.mes-hall2012

Inelastic electron and light scattering from the elementary electronic excitations in quantum wells: Zero magnetic field

Manvir S. Kushwaha

The most fundamental approach to an understanding of electronic, optical, and transport phenomena which the condensed matter physics (of conventional as well as nonconventional sys…

cond-mat.mes-hall2012★ 26 cited

Terahertz Dynamics of Quantum-Confined Electrons in Carbon Nanomaterials

L. Ren, Q. Zhang, S. Nanot +3

Low-dimensional carbon nanostructures, such as single-wall carbon nanotubes (SWCNTs) and graphene, offer new opportunities for terahertz science and technology. Being zero-gap syst…

cond-mat.mes-hall2012★ 39 cited

Coherent Phonons in Carbon Nanotubes and Graphene

J. -H. Kim, A. R. T. Nugraha, L. G. Booshehri +8

We review recent studies of coherent phonons (CPs) corresponding to the radial breathing mode (RBM) and G-mode in single-wall carbon nanotubes (SWCNTs) and graphene. Because of the…

cond-mat.mes-hall2012★ 11 cited

Generation of Superfluorescent Bursts from a Fully Tunable Semiconductor Magneto-plasma

G. T. Noe, J. -H. Kim, J. Lee +7

Quantum particles sometimes cooperate to develop a macroscopically ordered state with extraordinary properties. Superconductivity and Bose-Einstein condensation are examples of suc…

cond-mat.mes-hall2012★ 262 cited

Terahertz and Infrared Spectroscopy of Gated Large-Area Graphene

Lei Ren, Qi Zhang, Jun Yao +9

We have fabricated a centimeter-size single-layer graphene device, with a gate electrode, which can modulate the transmission of terahertz and infrared waves. Using time-domain ter…

cond-mat.mes-hall2012★ 96 cited

Ferromagnetism in graphene nanoribbons: split versus oxidative unzipped ribbons

S. S. Rao, S. Narayana Jammalamadaka, A. Stesmans +5

Two types of graphene nanoribbons: (a) potassium-split graphene nanoribbons (GNRs), and (b) oxidative unzipped and chemically converted graphene nanoribbons (CCGNRs) were investiga…

cond-mat.mes-hall2012★ 23 cited

Enhancement of the Fractional Quantum Hall State in a Small In-Plane Magnetic Field

Guangtong Liu, Chi Zhang, D. C. Tsui +5

Using a 50-nm width, ultra-clean GaAs/AlGaAs quantum well, we have studied the Landau level filling factor fractional quantum Hall effect in a perpendicular magnetic field…

cond-mat.mes-hall2012★ 33 cited

Observation of Coulomb-Assisted Dipole-Forbidden Intraexciton Transitions in Semiconductors

W. D. Rice, J. Kono, S. Zybell +14

We use terahertz pulses to induce resonant transitions between the eigenstates of optically generated exciton populations in a high-quality semiconductor quantum-well sample. Monit…

cond-mat.mes-hall2012★ 5 cited

Local charge transfer doping in suspended graphene nanojunctions

J. H. Worne, H. Gullapalli, C. Galande +2

We report electronic transport measurements in nanoscale graphene transistors with gold and platinum electrodes whose channel lengths are shorter than 100 nm, and compare them with…