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Interband and Gap State Related Transitions in β‐Rhombohedral Boron
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TLDR
In this article, the anisotropy of the electronic interband transitions of β-rhombohedral boron is determined by optical absorption measurements, and the band gaps (indirect allowed transitions) are 1.32 and 1.46 eV for E ⟂ c (extrapolated to T = 0 K).Citations
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Ionic high-pressure form of elemental boron
Artem R. Oganov,Artem R. Oganov,Artem R. Oganov,Jiuhua Chen,Jiuhua Chen,Carlo Gatti,Yanzhang Ma,Yanming Ma,Yanming Ma,Colin W. Glass,Zhenxian Liu,Tony Yu,Oleksandr O. Kurakevych,Vladimir L. Solozhenko +13 more
TL;DR: It is found that the ionicity of the phase affects its electronic bandgap, infrared adsorption and dielectric constants, and that it arises from the different electronic properties of the B2 pairs and B12 clusters and the resultant charge transfer between them.
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β-Rhombohedral Boron: At the Crossroads of the Chemistry of Boron and the Physics of Frustration
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Two‐Dimensional Boron Crystals: Structural Stability, Tunable Properties, Fabrications and Applications
Xu Sun,Xiaofei Liu,Jun Yin,Jin Yu,Yao Li,Yang Hang,Xiaocheng Zhou,Maolin Yu,Jidong Li,Guoan Tai,Wanlin Guo +10 more
TL;DR: A survey of the latest achievements on 2D boron structures, starting from a concise introduction of the bulk allotropes of BORON, borone clusters, and especially potential building blocks for 2D 2D crystals can be found in this paper.
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Correlation between structural defects and electronic properties of icosahedral boron-rich solids
Roland Schmechel,Helmut Werheit +1 more
TL;DR: In this paper, it was shown that the concentrations of structural defects and electronic gap states are quantitatively correlated, and that this way the electron deficiencies theoretically calculated for the valence bands of corresponding idealized structures are compensated.
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Imperfect crystal and unusual semiconductor: boron, a frustrated element.
TL;DR: In this article, the authors used lattice Monte Carlo techniques combined with ab initio calculations to find that β-Rhombohedral boron is stabilized by a macroscopic amount of intrinsic defects that are responsible not only for entropic effects but also for a reduction in internal energy.
References
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Disorder and the Optical-Absorption Edge of Hydrogenated Amorphous Silicon
TL;DR: The effect of thermal and structural disorder on the electronic structure of hydrogenated amorphous silicon is investigated by measurement of the shape of the optical absorption edge as a function of temperature and thermal evolution of hydrogen as discussed by the authors.
Journal ArticleDOI
On the photoionization of deep impurity centers in semiconductors
TL;DR: In this paper, the wavelength dependence of the photoionization cross section for deep, semiconductor impurity centers, e.g., in doped Si, is calculated using a model in which the ground state wave function is determined solely by a suitable short range ion core potential.
Journal ArticleDOI
Theory of the temperature dependence of the direct gap of germanium
Philip B. Allen,Manuel Cardona +1 more
TL;DR: In this paper, a complete pseudopotential calculation of the temperature dependence of the conduction-band and the valence-band states is performed using the lattice dynamics of Weber's bond-charge model and a local pseudoprocessor with a basis of 59 plane waves.
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