Fabrication of a Freestanding Boron Nitride Single Layer and Its Defect Assignments

Jin, Chuanhong; Lin, Fang; Suenaga, Kazu; Iijima, Sumio

doi:10.1103/physrevlett.102.195505

Cited by 1,076 publications

(869 citation statements)

References 22 publications

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“…The most likely candidates are a nitrogen vacancy (V N ), a boron vacancy (V B ) or an anti-site complex in which the nitrogen occupies the boron site and there is a missing atom at the nitrogen cite (N B V N ) 35,36 . We exclude the possibility of a di-vacancy as those have been shown to be highly unstable 37 . The V B has been theoretically predicted to have a UV absorption and emission band 36 that is inconsistent with our experimental data.…”

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confidence: 99%

Quantum emission from hexagonal boron nitride monolayers

et al. 2015

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Atomically thin van der Waals crystals have recently enabled new scientific and technological breakthroughs across a variety of disciplines in materials science, nanophotonics and physics. However, non-classical photon emission from these materials has not been achieved to date. Here we report room temperature quantum emission from hexagonal boron nitride nanoflakes. The single photon emitter exhibits a combination of superb quantum optical properties at room temperature that include the highest brightness reported in the visible part of the spectrum, narrow line width, absolute photo-stability, a short excited state lifetime and a high quantum efficiency. Density functional theory modeling suggests that the emitter is the antisite nitrogen vacancy defect that is present in single and multi-layer hexagonal boron nitride. Our results constitute the unprecedented potential of van der Waals crystals for nanophotonics, optoelectronics and quantum information processing.

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confidence: 99%

Quantum emission from hexagonal boron nitride monolayers

et al. 2015

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“…The intriguing structural, electronic, and optical properties of many two-dimensional (2D) materials similar to graphene such as the transition-metal dichalcogenides [1][2][3], group IV elements [4,5], and group III-V based 2D materials [6][7][8] have motivated further research for new discoveries. Owing to its attractive intrinsic properties such as high carrier mobility, direct band gap, and superior optical properties, phosphorene has been widely in focus [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Optical properties of single-layer and bilayer arsenene phases

2016

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An extensive investigation of the optical properties of single-layer buckled and washboard arsenene and their bilayers was performed, starting from layered three-dimensional crystalline phase of arsenic using density functional and many-body perturbation theories combined with random phase approximation. Electron-hole interactions were taken into account by solving the Bethe-Salpeter equation, suggesting first bound exciton energies on the order of 0.7 eV. Thus, many-body effects were found to be crucial for altering the optical properties of arsenene. The light absorption of single-layer and bilayer arsenene structures in general falls within the visible-ultraviolet spectral regime. Moreover, directional anisotropy, varying the number of layers, and applying homogeneous or uniaxial in-plane tensile strain were found to modify the optical properties of two-dimensional arsenene phases, which could be useful for diverse photovoltaic and optoelectronic applications.

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“…Early experimental studies aiming to synthesize and characterize novel monolayer materials have revealed that graphene-like sheets of BN are also stable. [29][30][31] Though BN has the same planar structure as graphene due to the ionic character of B-N bonds, BN crystal is a wide band gap insulator with an energy gap of 4.6 eV. [32][33][34][35] The perfect lattice matching between graphene and BN layers make it possible to construct nanoscale devices.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of alkali, alkaline-earth, and 3dtransition metal atoms on silicene

2013

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The adsorption characteristics of alkali, alkaline earth and transition metal adatoms on silicene, a graphene-like monolayer structure of silicon, are analyzed by means of first-principles calculations. In contrast to graphene, interaction between the metal atoms and the silicene surface is quite strong due to its highly reactive buckled hexagonal structure. In addition to structural properties, we also calculate the electronic band dispersion, net magnetic moment, charge transfer, workfunction and dipole moment of the metal adsorbed silicene sheets. Alkali metals, Li, Na and K, adsorb to hollow site without any lattice distortion. As a consequence of the significant charge transfer from alkalis to silicene metalization of silicene takes place. Trends directly related to atomic size, adsorption height, workfunction and dipole moment of the silicene/alkali adatom system are also revealed. We found that the adsorption of alkaline earth metals on silicene are entirely different from their adsorption on graphene. The adsorption of Be, Mg and Ca turns silicene into a narrow gap semiconductor. Adsorption characteristics of eight transition metals Ti, V, Cr, Mn, Fe, Co, Mo and W are also investigated. As a result of their partially occupied d orbital, transition metals show diverse structural, electronic and magnetic properties. Upon the adsorption of transition metals, depending on the adatom type and atomic radius, the system can exhibit metal, half-metal and semiconducting behavior. For all metal adsorbates the direction of the charge transfer is from adsorbate to silicene, because of its high surface reactivity. Our results indicate that the reactive crystal structure of silicene provides a rich playground for functionalization at nanoscale.

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Fabrication of a Freestanding Boron Nitride Single Layer and Its Defect Assignments

Cited by 1,076 publications

References 22 publications

Quantum emission from hexagonal boron nitride monolayers

Quantum emission from hexagonal boron nitride monolayers

Optical properties of single-layer and bilayer arsenene phases

Adsorption of alkali, alkaline-earth, and 3dtransition metal atoms on silicene

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