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Metastable photoinduced Electron Paramagnetic Resonance (EPR) signal at low temperatures is reported in GaN alloyed with boron ($B_{x}Ga_{1-x}N$) epitaxial layers grown at temperatures ranging from 840 {\deg}C to 1090 {\deg}C. An isotropic…

Electron spin resonance (ESR) investigation of graphene nanoribbons (GNRs) prepared through longitudinal unzipping of multiwalled carbon nanotubes (MWCNTs) indicates the presence of C-related dangling bond centers, exhibiting paramagnetic…

介观与纳米尺度物理 · 物理学 2015-05-19 S. S. Rao , A. Stesmans , D. V. Kosynkin , A. Higginbotham , J. M. Tour

We analyze electronic and phononic quantum transport through zigzag or chiral graphene nanoribbons (GNRs) perforated with an array of nanopores. Since local charge current profiles in these GNRs are peaked around their edges, drilling…

介观与纳米尺度物理 · 物理学 2012-07-17 Po-Hao Chang , Branislav K. Nikolic

Electron paramagnetic resonance (EPR) can provide unique insight into the chemical structure and magnetic properties of dopants in oxide and semiconducting materials that are of interest for applications in electronics, catalysis, and…

Rare-earth spin ensembles are a promising platform for microwave quantum memory applications due to their hyperfine transitions, which can exhibit exceptionally long coherence times when using an operation point with zero first-order Zeeman…

Zigzag edges of neutral armchair-oriented Graphene Nano-Ribbons show states strongly localized at those edges. They behave as free radicals that can capture electrons during processing, increasing ribbon's stability. Thus, charging and its…

介观与纳米尺度物理 · 物理学 2019-07-26 E. Louis , E. San-Fabian , G. Chiappe , J. A. Verges

We present a novel comprehensive first-principles theoretical study of the electronic properties and relative stabilities of edge-oxidized zigzag graphene nanoribbons. The oxidation schemes considered include hydroxyl, carboxyl, ether, and…

材料科学 · 物理学 2015-05-13 Oded Hod , Veronica Barone , Juan E. Peralta , Gustavo E. Scuseria

We have surveyed the in-plane transport properties of the graphene twist bilayer using (i) a low-energy effective Hamiltonian for the underlying electronic structure, (ii) an isotropic elastic phonon model, and (iii) the linear Boltzmann…

介观与纳米尺度物理 · 物理学 2016-12-21 N. Ray , M. Fleischmann , D. Weckbecker , S. Sharma , O. Pankratov , S. Shallcross

F+ center, an electron trapped at oxygen vacancy (VO), was investigated in the oxygen deficient Y3Al5O12 (YAG) crystals by EPR. The measurements were performed at temperatures 5-450 K and frequencies 9.4-350 GHz with using both the continue…

材料科学 · 物理学 2020-01-22 V. Laguta , M. Buryi , S. Tkachenko , P. Arhipov , I. Gerasymov , O. Sidletskiy , O. Laguta , M. Nikl

Mn2+ ion doping is used as an electron paramagnetic resonance (EPR) probe to investigate the influence of low-coordination structural defects such as step edges at the surface of terraced (001) MgO nanoparticles on the electronic…

介观与纳米尺度物理 · 物理学 2016-05-24 Peter V. Pikhitsa , Sukbyung Chae , Seungha Shin , Mansoo Choi

We have studied the role of spin-dependent processes on conductivity in polyfluorene (PFO) thin films by conducting continuous wave (c.w.) electrically detected magnetic resonance (EDMR) spectroscopy at temperatures between 10 K and 293 K…

材料科学 · 物理学 2016-12-14 Richards Miller , K. J. van Schooten , H. Malissa , G. Joshi , S. Jamali , J. M. Lupton , C. Boehme

We report on a systematic temperature dependent X-band electron paramagnetic resonance (EPR) study of nano-sized graphite particles prepared by ball-milling. In as-prepared samples a very intense and sharp EPR resonance at $g=2.0035$ has…

Magnetic nanoparticles of gamma-Fe2O3 coated by organic molecules and suspended in liquid and solid matrices, as well as a non-diluted magnetic fluid have been studied by electron magnetic resonance (EMR) at 77-380 K. Slightly asymmetric…

材料科学 · 物理学 2009-11-11 N. Noginova , F. Chen , T. Weaver , E. P. Giannelis , A. B. Bourlinos , V. A. Atsarkin

A multi-frequency electron spin resonance (ESR) study provides evidence for the occurrence of low temperature ferromagnetic/spin-glass behavior in aligned arrays of sub-nanometer single walled carbon nanotubes confined in zeolite…

介观与纳米尺度物理 · 物理学 2015-05-19 S. S. Rao , A. Stesmans , J. V. Noyen , P. Jacobs , B. Sels

A computational study of the Electron Paramagnetic Resonance (EPR) $g$-tensors and hyperfine tensors of Li and Ga vacancies in LiGaO$_2$ is presented. Density Functinal Theory (DFT) calculations are carried out of the Ga and Li vacancies…

材料科学 · 物理学 2020-04-22 Dmitry Skachkov , Walter Lambrecht , Klichchupong Dabsamut , Adisak Boonchun

We present results of an electron paramagnetic resonance (EPR) study of Nd$_{1-x}$Sr$_x$MnO$_3$ with x = 0.5 across the paramagnetic to ferromagnetic, insulator to metal transition at 260 K (T$_c$) and the antiferromagnetic, charge ordering…

强关联电子 · 物理学 2007-05-23 Janhavi P. Joshi , A. K. Sood , S. V. Bhat , A. R. Raju , C. N. R. Rao

Selective two-electron oxygen reduction reaction (ORR) offers a promising route for hydrogen peroxide synthesis, and defective sp2 carbon-based materials are attractive, low-cost electrocatalysts for this process. However, due to a wide…

Motivated by recent advances in fabricating graphene nanostructures, we find that an electron can be trapped in Z-shaped graphene nanoconstriction with zigzag edges. The central section of the constriction operates as a single-level quantum…

介观与纳米尺度物理 · 物理学 2010-09-23 Adam Rycerz

This comprehensive study investigates charge transport through the multiple end zigzag edge states of finite-size armchair graphene nanoribbons/boron nitride nanoribbons (n-AGNR/w-BNNR) junctions under a longitudinal electric field, where n…

介观与纳米尺度物理 · 物理学 2024-06-18 David M T Kuo

Graphene nanoribbons' electronic transport properties strongly depend on the type of edge, armchair, zigzag or other, and on edge functionalization that can be used for band-gap engineering. For only partly hydrogenated edges interesting…

介观与纳米尺度物理 · 物理学 2021-11-12 Sebastian Schneider , Regina Hoffmann-Vogel
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