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Papers by Keyword: Lattice Vacancy

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The Influence of Lattice Vacancy on Electrical and Optical Properties of Mg₂Si

Authors: Qian Chen, Kan Chen, Qing Chen, Qing Quan Xiao, Quan Xie

Abstract: A detailed theoretical study on the influence of lattice vacancy on structural and optical properties of the magnesium silicide Mg₂Si has been performed based on the first-principles pseudopotential method. The results show that Mg₂Si has changed from indirect band gap semiconductor to direct band gap semiconductor because of Mg vacancy. Compared with the dielectric function, absorption coefficient, refractive index, reflectivity and photon conductivity of Mg₂Si, those peaks of Mg₁₅Si₈appear from 0 to 1.8 eV. And the loss function’s biggest peak of Mg₁₅Si₈moves to the direction of high energy.

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Vacancy Studies in Silicon-Rich Intermetallic Compounds: MoSi₂

Authors: W. Sprengel, X.Y. Zhang, Haruyuki Inui, Hans Eckhardt Schaefer

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Identification of Lattice Vacancies and Structural Phase Transitions in Solids by Positron Annihilation Spectroscopy

Authors: W. Sprengel, Al. Rempel, F. Baier, K. Sato, Hans Eckhardt Schaefer

Identification of Vacancies on each Sublattice of SiC by Coincident Doppler Broadening of the Positron Annihilation Photons after Electron Irradiation

Authors: M.A. Müller, Al. Rempel, K.J. Reichle, W. Sprengel, J. Major, Hans Eckhardt Schaefer

PAT Studies of B Vacancies in Ba(Sn_1-xSb_x)O₃ Ceramics

Authors: Zi Ying Zhu, Renshu Chen, Yan Zhuang

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