Lowering the excitation threshold of a random laser using the dynamic scattering states of an organosiloxane smectic A liquid crystal
Stephen M. Morris, Damian J. Gardiner, Malik M. Qasim, Philip J. W. Hands, Timothy D. Wilkinson et al.
Smectic A liquid crystals, based upon molecular structures that consist of combined siloxane and mesogenic moieties, exhibit strong multiple scattering of light with and without the presence of an electric field. This paper demonstrates that when one adds a laser dye to these compounds it is possibl ... [J. Appl. Phys. 111, 033106 (2012)] published Fri Feb 10, 2012.
Investigation of easy axis orientation of NdFeB melt-spun ribbons produced by hot rolling and influence of TiC addition
M. Takezawa, Y. Nakanishi, Y. Morimoto, J. Yamasaki, and M. Yagi
The c-axis orientation of NdFeB melt-spun ribbons caused by hot rolling and the influence of TiC addition were investigated. A small roll was placed on a steel wheel near a quartz tube in such a manner that the melt-spun ribbons were hot rolled immediately after quenching. X-ray diffraction patterns ... [J. Appl. Phys. 111, 07A703 (2012)] published Fri Feb 10, 2012.
Transparent conductive thin films of single-wall carbon nanotubes encapsulating dopant molecules
Naoki Kishi, Ikuma Miwa, Toshiya Okazaki, Takeshi Saito, Toshihisa Mizutani et al.
Transparent conductive thin films of single-wall carbon nanotubes (SWCNTs) doped with organic dopant molecules encapsulated inside the SWCNTs are reported. Doping with tetrafluorotetracyano-p-quinodimethane encapsulated within the SWCNTs improved the ratio of direct current to optical conductivity i ... [Appl. Phys. Lett. 100, 063121 (2012)] published Fri Feb 10, 2012.
Epitaxial NiO gate dielectric on AlGaN/GaN heterostructures
Fabrizio Roccaforte, Giuseppe Greco, Patrick Fiorenza, Vito Raineri, Graziella Malandrino et al.
This letter reports on epitaxial nickel oxide (NiO) films grown by metal-organic chemichal vapor deposition on AlGaN/GaN heterostructures. The grown material was epitaxial, free from voids and exhibited a permittivity of 11.7, close to bulk NiO. This approach is advantageous with respect other metho ... [Appl. Phys. Lett. 100, 063511 (2012)] published Fri Feb 10, 2012.
Bloch surface waves-controlled fluorescence emission: Coupling into nanometer-sized polymeric waveguides
Mirko Ballarini, Francesca Frascella, Emanuele Enrico, Pietro Mandracci, Natascia De Leo et al.
The lateral confinement of Bloch surface waves on a patterned multilayer is investigated by means of leakage radiation microscopy (LRM). Arrays of nanometric polymeric waveguides are fabricated on a proper silicon-nitride/silicon-oxide multilayer grown on a standard glass coverslip. By exploiting th ... [Appl. Phys. Lett. 100, 063305 (2012)] published Fri Feb 10, 2012.
How to impose stick boundary conditions in coarse-grained hydrodynamics of Brownian colloids and semi-flexible fiber rheology
Robert D. Groot
Long-range hydrodynamics between colloidal particles or fibers is modelled by the fluid particle model. Two methods are considered to impose the fluid boundary conditions at colloidal surfaces. In the first method radial and transverse friction forces between particle and solvent are applied such th ... [J. Chem. Phys. 136, 064901 (2012)] published Fri Feb 10, 2012.
Mechanism of OH radical hydration: A comparative computational study of liquid and supercritical solvent
Dorota Swiatla-Wojcik and Joanna Szala-Bilnik
Flexible models of the radical and water molecules including short-range interaction of hydrogen atoms have been employed in molecular dynamic simulation to understand mechanism of OH hydration in aqueous systems of technological importance. A key role of H-bond connectivity patterns of water molecu ... [J. Chem. Phys. 136, 064510 (2012)] published Fri Feb 10, 2012.
Local structural models of complex oxygen- and hydroxyl-rich GaP/InP(001) surfaces
Brandon C. Wood, Tadashi Ogitsu, and Eric Schwegler
We perform density-functional theory calculations on model surfaces to investigate the interplay between the morphology, electronic structure, and chemistry of oxygen- and hydroxyl-rich surfaces of InP(001) and GaP(001). Four dominant local oxygen topologies are identified based on the coordination ... [J. Chem. Phys. 136, 064705 (2012)] published Fri Feb 10, 2012.
Electronic states and the influence of oxygen addition on the optical absorption behaviour of manganese phthalocyanine
R. Friedrich, T. Hahn, J. Kortus, M. Fronk, F. Haidu et al.
The effects of electronic states and air exposure on the spectroscopic properties of manganese phthalocyanine (MnPc) have been examined. The observed features of the Q-band in the absorption spectra can be explained by intrinsic electronic properties of MnPc, i.e., the formation of singly charged mo ... [J. Chem. Phys. 136, 064704 (2012)] published Fri Feb 10, 2012.
Phonon Raman scattering of RCrO perovskites (R=Y, La, Pr, Sm, Gd, Dy, Ho, Yb, Lu)
M. C. Weber, J. Kreisel, P. A. Thomas, M. Newton, K. Sardar et al.
We report a systematic investigation of orthorhombic perovskite-type RCrO powder samples by Raman scattering for nine different rare earth R cations (R = Y, La, Pr, Sm, Gd, Dy, Ho, Yb, and Lu). The room-temperature Raman spectra and the associated phonon mode assignment provide reference data for st ... [Phys. Rev. B 85, 054303 ] published .
Diffusion of Nd-rich phase in the spark plasma sintered and hot deformed nanocrystalline NdFeB magnets
Y. L. Huang, Z. W. Liu, X. C. Zhong, H. Y. Yu, X. X. Gao et al.
The role of the Nd-rich phase in developing microstructure and properties of isotropic and anisotropic NdFeB magnets has been investigated. Melt spun Nd-rich NdFeCoGaB and Fe-rich NdPrFeB alloy powders were mechanically mixed with different ratios. The mixed powders were consolidated into isotropic ... [J. Appl. Phys. 111, 033913 (2012)] published Thu Feb 9, 2012.
Growth and electrical characterisation of delta-doped boron layers on (111) diamond surfaces
Robert Edgington, Syunsuke Sato, Yuichiro Ishiyama, Richard Morris, Richard B. Jackman et al.
A plasma enhanced chemical vapor deposition protocol for the growth of delta-doping of boron in diamond is presented, using the (111) diamond plane as a substrate for diamond growth. AC Hall effect measurements have been performed on oxygen terminated delta-layers and desirable sheet carrier densiti ... [J. Appl. Phys. 111, 033710 (2012)] published Thu Feb 9, 2012.
Room temperature single photon emission from an epitaxially grown quantum dot
O. Fedorych, C. Kruse, A. Ruban, D. Hommel, G. Bacher et al.
Single photon emission from an epitaxially grown quantum dot at room temperature is presented. CdSe/ZnSSe quantum dots are embedded into MgS barriers, providing dominant radiative recombination up to 300 K. Under continuous wave optical excitation, the autocorrelation function g(t) exhibits a sharp ... [Appl. Phys. Lett. 100, 061114 (2012)] published Thu Feb 9, 2012.
Energy band engineering and controlled p-type conductivity of CuAlO thin films by nonisovalent Cu-O alloying
Z. Q. Yao, B. He, L. Zhang, C. Q. Zhuang, T. W. Ng et al.
The electronic band structure and p-type conductivity of CuAlO films were modified via synergistic effects of energy band offset and partial substitution of less-dispersive Cu 3d with Cu 3d orbitals in the valence band maximum by alloying nonisovalent Cu-O with CuAlO host. The Cu-O/CuAlO alloying fi ... [Appl. Phys. Lett. 100, 062102 (2012)] published Thu Feb 9, 2012.
Electric Field Confinement Effect on Charge Transport in Organic Field-Effect Transistors
Xiaoran Li, Andrey Kadashchuk, Ivan I. Fishchuk, Wiljan T. T. Smaal, Gerwin Gelinck et al.
While it is known that the charge-carrier mobility in organic semiconductors is only weakly dependent on the electric field at low fields, the experimental mobility in organic field-effect transistors using silylethynyl-substituted pentacene is found to be surprisingly field dependent at low source- ... [Phys. Rev. Lett. 108, 066601 ] published .
Extremal transmission through a microwave photonic crystal and the observation of edge states in a rectangular Dirac billiard
S. Bittner, B. Dietz, M. Miski-Oglu, and A. Richter
This paper presents experimental results on properties of waves propagating in an unbounded and a bounded photonic crystal consisting of metallic cylinders that are arranged in a triangular lattice. First, we present transmission measurements of plane waves traversing a photonic crystal. The experim ... [Phys. Rev. B 85, 064301 ] published .
Brillouin scattering studies of acoustic phonon modes and central peak in single-crystal Pb(ScTa)O
V. Sivasubramanian and S. Kojima
Brillouin spectra measurements have been carried out from 800 to 100 K for Pb(ScTa)O in back-scattering geometry. The frequency of the longitudinal acoustic (LA) phonon begins to show marked softening followed by an increase in its width below the intermediate temperature T = 450 K. The gradual incr ... [Phys. Rev. B 85, 054104 ] published .
Quantum confinement in Si and Ge nanostructures
E. G. Barbagiovanni, D. J. Lockwood, P. J. Simpson, and L. V. Goncharova
We apply perturbative effective mass theory as a broadly applicable theoretical model for quantum confinement (QC) in all Si and Ge nanostructures including quantum wells (QWs), wires (Q-wires), and dots (QDs). Within the limits of strong, medium, and weak QC, valence and conduction band edge energy ... [J. Appl. Phys. 111, 034307 (2012)] published Wed Feb 8, 2012.
Thermodynamic, Raman and electrical switching studies on SiTeAg (4 <= x <= 20) glasses
Srinivasa Rao Gunti and Sundarrajan Asokan
We have investigated thermal properties of bulk SiTeAg (4 <= x <= 20) glasses in detail, through alternating differential scanning calorimetry experiments. The composition dependence of thermal parameters reveal the signatures of rigidity percolation and chemical threshold at compositions x = 12 and ... [J. Appl. Phys. 111, 033518 (2012)] published Wed Feb 8, 2012.
Activation of water on the TiO (110) surface: The case of Ti adatoms
Meng Miao, Yingchun Liu, Qi Wang, Tao Wu, Liping Huang et al.
Using first-principles calculations we have studied the reactions of water over Ti adatoms on the (110) surface of rutile TiO. Our results provide fundamental insights into the microscopic mechanisms that drive this reaction at the atomic level and assess the possibility of using this system to acti ... [J. Chem. Phys. 136, 064703 (2012)] published Wed Feb 8, 2012.
First principles analysis of the initial oxidation of Si(001) and Si(111) surfaces terminated with H and CH
Huashan Li, Zhibin Lin, Zhigang Wu, and Mark T. Lusk
Transition state analyses have been carried out within a density functional theory setting to explain and quantify the distinctly different ways in which hydrogen and methyl terminations serve to protect silicon surfaces from the earliest onset of oxidation. We find that oxidation occurs via direct ... [J. Chem. Phys. 136, 064507 (2012)] published Wed Feb 8, 2012.
The role of structure in the nonlinear mechanics of cross-linked semiflexible polymer networks
Nicholas Agung Kurniawan, Soren Enemark, and Raj Rajagopalan
The microstructural basis of the characteristic nonlinear mechanics of biopolymer networks remains unclear. We present a 3D network model of realistic, cross-linked semiflexible fibers to study strain-stiffening and the effect of fiber volume-occupancy. We identify two structural parameters, namely, ... [J. Chem. Phys. 136, 065101 (2012)] published Wed Feb 8, 2012.
Structure and properties of metal-exchanged zeolites studied using gradient-corrected and hybrid functionals. I. Structure and energetics
Florian Goltl and Jurgen Hafner
The structural and energetic properties of purely siliceous, proton-, and Cu- and Co-exchanged chabazite have been studied using periodic density-functional (DFT) calculations with both conventional gradient-corrected exchange-correlation functionals and hybrid functionals mixing exact (i.e., Hartre ... [J. Chem. Phys. 136, 064501 (2012)] published Wed Feb 8, 2012.
Microstructure, AC impedance and DC electrical conductivity characteristics of NiFeGdO (x = 0, 0.05 and 0.075)
K. Kamala Bharathi, G. Markandeyulu, and C. V. Ramana
The structure and electrical characteristics of Gd doped Ni ferrite materials, namely NiFeGdO and NiFeGdO are reported to demonstrate their improved electrical properties compared to that of pure NiFeO. NiFeGdO and NiFeGdO compounds crystallize in the cubic inverse spinel phase with a very small amo ... [AIP Advances 2, 012139 (2012)] published Wed Feb 8, 2012.
Development of tilted hexagonal platelet ZnO using atmospheric pressure chemical vapor deposition and investigation of its growth mechanism
Y. Z. Yoo, S. H. Kim, G. S. Yoon, E. H. Choi, J.-W. Park et al.
Large area ZnO films (25 x 25 cm) grown via atmospheric pressure chemical vapor deposition (APCVD) showed unique surface morphologies of tilted hexagonal platelets. In response to the tilt angle change from 50 degrees to 75 degrees , haze values increased from 7% to 25%, indicating that tilt angl ... [Appl. Phys. Lett. 100, 061909 (2012)] published Wed Feb 8, 2012.
Coexistence of bi-stable memory and mono-stable threshold resistance switching phenomena in amorphous NbO films
Jieun Bae, Inrok Hwang, Yuhyun Jeong, Sung-Oong Kang, Sahwan Hong et al.
Both bi-stable memory and mono-stable threshold switching are observed in amorphous NbO films. In addition, the transition between memory and threshold switching can be induced by changing external electrical stress. Raman spectroscopy and transmission electron microscope data show that the NbO film ... [Appl. Phys. Lett. 100, 062902 (2012)] published Wed Feb 8, 2012.
Effect of surface plasmon energy matching on the sensing capability of metallic nano-hole arrays
Mohamadreza Najiminaini, Fartash Vasefi, Bozena Kaminska, and Jeffrey J. L. Carson
We report on a nano-hole array structure with a single cavity beneath the perforated gold film. Structures were fabricated with a variety of cavity depths. The optical resonance of each structure as well as the surface plasmon (SP) energy matching between the top and bottom of the gold film were inv ... [Appl. Phys. Lett. 100, 063110 (2012)] published Wed Feb 8, 2012.
Near-infrared nano-spectroscopy of semiconductor quantum dots using a phase-change mask layer
N. Tsumori, M. Takahashi, R. Kubota, P. Regreny, M. Gendry et al.
We propose a technique that uses an optical mask layer of a phase-change material (PCM), which is used for rewritable optical recording media, to achieve highly sensitive near-field imaging spectroscopy of single semiconductor quantum constituents at optical telecommunication wavelengths. An amorpho ... [Appl. Phys. Lett. 100, 063111 (2012)] published Wed Feb 8, 2012.
Work function extraction of metal gates with alternate channel materials
Mary Coan, Derek Johnson, Jung Hwan Woo, Nivedita Biswas, Veena Misra et al.
The effects of a heterojunction on the effective work function in a metal/high kappa gate stack are studied and a new structure developed for the extraction of the work function. It is found that when a Ge/Si heterostructure on silicon is low doped and sufficiently thin, then the work function can b ... [J. Vac. Sci. Technol. B 30, 022202 (2012)] published Wed Feb 8, 2012.
Sudden collapse of a colloidal gel
Paul Bartlett, Lisa J. Teece, and Malcolm A. Faers
Metastable gels formed by weakly attractive colloidal particles display a distinctive two-stage time-dependent settling behavior under their own weight. Initially, a space-spanning network is formed that, for a characteristic time, which we define as the lag time tau, resists compaction. This solidl ... [Phys. Rev. E 85, 021404 ] published .
Stability and minimum size of colloidal clusters on a liquid-air interface
V. M. Pergamenshchik
A vertical force applied to each of two colloids, trapped at a liquid-air interface, induces their logarithmic pairwise attraction. I recently showed [Phys. Rev. E 79, 011407 (2009)] that in clusters of size R much larger than the capillary length lambda, the attraction changes to that of a power la ... [Phys. Rev. E 85, 021403 ] published .
Accurate description of charge transport in organic field effect transistors using an experimentally extracted density of states
W. S. C. Roelofs, S. G. J. Mathijssen, R. A. J. Janssen, D. M. de Leeuw, and M. Kemerink
The width and shape of the density of states (DOS) are key parameters to describe the charge transport of organic semiconductors. Here we extract the DOS using scanning Kelvin probe microscopy on a self-assembled monolayer field effect transistor (SAMFET). The semiconductor is only a single monolaye ... [Phys. Rev. B 85, 085202 ] published .
Vacuum space-charge effects in nano-ARPES
S. Hellmann, T. Ott, L. Kipp, and K. Rossnagel
Angle-resolved photoemission spectroscopy (ARPES) provides a powerful tool for probing the spatially averaged electronic structure of condensed matter at high energy and momentum resolution. Current efforts to add spatial resolution by reducing the focal spot size of the incident radiation to the na ... [Phys. Rev. B 85, 075109 ] published .
ZnO/Si arrays decorated by Au nanoparticles for surface-enhanced Raman scattering study
Yu Fei Chan, Hai Jun Xu, Lei Cao, Ying Tang, De Yao Li et al.
Large scale and highly ordered flowerlike ZnO/Si nanostructures are successfully prepared by combining two common techniques, viz. hydrothermally etch fabrication of nanoporous Si pillar array (NSPA) and self-catalytic chemical vapor transport growth of ZnO nanowires. Au nanoparticles are decorated ... [J. Appl. Phys. 111, 033104 (2012)] published Tue Feb 7, 2012.
Identifying and evaluating organic nonlinear optical materials via molecular moments
A. P. Higginbotham, J. M. Cole, M. A. Blood-Forsythe, and D. D. Hickstein
We demonstrate how to appropriately estimate the zero-frequency (static) hyperpolarizability of an organic molecule from its charge distribution, and we explore applications of these estimates for identifying and evaluating new organic nonlinear optical (NLO) materials. First, we calculate hyperpola ... [J. Appl. Phys. 111, 033512 (2012)] published Tue Feb 7, 2012.
Rectifying behaviors induced by BN-doping in trigonal graphene with zigzag edges
X. Q. Deng, Z. H. Zhang, G. P. Tang, Z. Q. Fan, M. Qiu et al.
Based on nonequilibrium Green's functions in combination with density-function theory, the transport properties of trigonal graphenes, with the vertex carbon atom substituted by one phosphorus or boron atom and bounded through a B-N pair, coupled to gold electrodes are investigated. The rectificatio ... [Appl. Phys. Lett. 100, 063107 (2012)] published Tue Feb 7, 2012.
Gas Phase Deposition of Trichloro(1H,1H,2H,2H-perfluorooctyl)silane on Silicon Dioxide, by XPS
Michael V. Lee, Ghaleb Husseini, Ken Sautter, and Matthew R. Linford
Monolayers of trichloro(lH,1H,2H,2H-perfluorooctyl)silane, ClSiCHCH(CF)CF, were deposited via chemical vapor deposition onto the native oxide layer on silicon after plasma-cleaning. The samples have high hydrophobicity, and provide a valuable comparison to perfluorinated alkyl silane layers obtained ... [Surf. Sci. Spectra 17, 87 (2012)] published Tue Feb 7, 2012.
van der Waals density functional study of CO binding in zeolitic imidazolate frameworks
Keith G. Ray, David Olmsted, Ning He, Yao Houndonougbo, Brian B. Laird et al.
The van der Waals density functional (vdW-DF) formalism is employed in a study of the binding energetics for CO in a set of five zeolitic imidazolate framework (ZIF) compounds. The ZIF structures investigated share the same RHO-type zeolite topology and metal atoms, but feature imidazolate linkers w ... [Phys. Rev. B 85, 085410 ] published .
Structural origins of intrinsic stress in amorphous silicon thin films
Eric Johlin, Nouar Tabet, Sebastian Castro-Galnares, Amir Abdallah, Mariana I. Bertoni et al.
Hydrogenated amorphous silicon (a-Si:H) refers to a broad class of atomic configurations, sharing a lack of long-range order, but varying significantly in material properties, including optical constants, porosity, hydrogen content, and intrinsic stress. It has long been known that deposition condit ... [Phys. Rev. B 85, 075202 ] published .
Evidence of oxygen-dependent modulation in LuFeO
J. Bourgeois, M. Hervieu, M. Poienar, A. M. Abakumov, E. Elkaim et al.
A polycrystalline sample of LuFeO has been investigated by means of powder synchrotron x-ray and neutron diffraction and transmission electron microscopy (TEM), along with Mossbauer spectroscopy and transport and magnetic properties. A monoclinic distortion is unambiguously evidenced, and the crysta ... [Phys. Rev. B 85, 064102 ] published .
Pronounced first-order metamagnetic transition in the paramagnetic heavy-fermion system CeTiGe
M. Deppe, S. Lausberg, F. Weickert, M. Brando, Y. Skourski et al.
We report on the observation of large, steplike anomalies in the magnetization (DeltaM=0.74 [mu]/Ce), in the magnetostriction (Deltal/l=2.0 x 10), and in the magnetoresistance in polycrystals of the paramagnetic heavy-fermion system CeTiGe at a critical magnetic field [mu]H[approximate]12 T at low ... [Phys. Rev. B 85, 060401 ] published .
Publisher's Note: Infrared optical response of LuFeO under dc electric field [Phys. Rev. B 85, 014303 (2012)]
Chul Lee, JooYoun Kim, S. W. Cheong, and E. J. Choi
Abstract not available. [Phys. Rev. B 85, 059902 ] published .
Electrical properties of individual NiFe/Pt multilayer nanowires measured in situ in a scanning electron microscope
Mohamed Elawayeb, Yong Peng, Kevin J. Briston, and Beverley J. Inkson
The electrical properties of individual NiFe/Pt multilayer nanowires have been measured in situ by nanomanipulators in a scanning electron microscope. The electrical measurement of ~50 nm diameter individual NiFe/Pt multilayer nanowires with polycrystalline microstructure shows that the nanowires ha ... [J. Appl. Phys. 111, 034306 (2012)] published Mon Feb 6, 2012.
Investigations of field instability of ferrofluid in hypergravity and microgravity
Theng Yee Chong, Kent Loong Ho, and Boon Hoong Ong
The field instability of the free surface of ferrofluid was investigated under microgravity and hypergravity environments conducted by parabolic flight. It is observed that the perturbation was suppressed under hypergravity, whereas at the microgravity condition, it appeared to have only slight incr ... [AIP Advances 2, 012138 (2012)] published Mon Feb 6, 2012.
Elastomeric silicone substrates for terahertz fishnet metamaterials
I. E. Khodasevych, C. M. Shah, S. Sriram, M. Bhaskaran, W. Withayachumnankul et al.
In this work, we characterize the electromagnetic properties of polydimethylsiloxane (PDMS) and use this as a free-standing substrate for the realization of flexible fishnet metamaterials at terahertz frequencies. Across the 0.22.5 THz band, the refractive index and absorption coefficient of PDMS ar ... [Appl. Phys. Lett. 100, 061101 (2012)] published Mon Feb 6, 2012.
Thermal and structural dependence of the band gap of quantum dots measured by a transparent film heater
Ju Yeon Woo, Suraj Kumar Tripathy, Kyungnam Kim, and Chang-Soo Han
We report the temperature dependence of the optical absorption and emission spectra of quantum dots (QDs) for three different nanocrystal (NC) structures (CdSe core, CdSe/CdS core/shell, and CdSe/CdS/ZnS core/multishell) in the solid film state. For this, a transparent single-walled carbon nanotube ... [Appl. Phys. Lett. 100, 063105 (2012)] published Mon Feb 6, 2012.
Surface area controlled heterogeneous nucleation
Brian Steer, Boris Gorbunov, Jonathan Rowles, and David Green
Heterogeneous nucleation of liquid from a gas phase on nanoparticles has been studied under various saturation ratios and nuclei size. The probability of liquid droplet nucleation, especially at a low degree of deviation from equilibrium, was measured for both atmospheric aerosol particles and engin ... [J. Chem. Phys. 136, 054704 (2012)] published Mon Feb 6, 2012.
X-ray photon correlation spectroscopy during homogenous shear flow
Wesley R. Burghardt, Marcin Sikorski, Alec R. Sandy, and Suresh Narayanan
We report x-ray photon correlation spectroscopy measurements of advective and diffusive dynamics in a dispersion of colloidal particles subjected to homogeneous shear flow in a rotating-disk shear cell. Intensity autocorrelation functions from scattering data collected using homodyne detection respo ... [Phys. Rev. E 85, 021402 ] published .
Spin-dependent Klein tunneling in graphene: Role of Rashba spin-orbit coupling
Ming-Hao Liu (劉明豪), Jan Bundesmann, and Klaus Richter
Within an effective Dirac theory the low-energy dispersions of monolayer graphene in the presence of Rashba spin-orbit coupling and spin-degenerate bilayer graphene are described by formally identical expressions. We explore implications of this correspondence for transport by choosing chiral tunnel ... [Phys. Rev. B 85, 085406 ] published .
Adsorption of oxygen-containing functional groups on free and supported graphene using point contact
Qian Wang, D. X. Ye, Y. Kawazoe, and P. Jena
First-principles electronic structure calculations based on spin-polarized density functional theory were carried out to study the adsorption of oxygen-containing functional groups -OH, -CHO, and -COOH on a two-dimensional (2D) infinite graphene sheet without edge states and defects. We find that th ... [Phys. Rev. B 85, 085404 ] published .