Asymmetry of the Atomic Core Structure of Dissociated a‐Screw Dislocation in GaN Probed by Polarization Optical Spectroscopy | Zendy

Medvedev Oleg | Zendy; Albrecht Martin | Zendy; Vyvenko Oleg | Zendy

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Asymmetry of the Atomic Core Structure of Dissociated a‐Screw Dislocation in GaN Probed by Polarization Optical Spectroscopy

Author(s) -

Medvedev Oleg,

Albrecht Martin,

Vyvenko Oleg

Publication year - 2019

Publication title -

physica status solidi (rrl) – rapid research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.786

H-Index - 68

eISSN - 1862-6270

pISSN - 1862-6254

DOI - 10.1002/pssr.201900169

Subject(s) - asymmetry , spectroscopy , polarization (electrochemistry) , dislocation , materials science , luminescence , crystallography , molecular physics , condensed matter physics , optics , optoelectronics , chemistry , physics , quantum mechanics

The a‐screw dislocation related luminescence (DRL) in n‐GaN is investigated with polarization optical spectroscopy. An unusual difference in the polarization directions of two DRL spectral components is observed: directed parallel or inclined at an angle of about 40° to the dislocation line. As a tentative explanation, that property is proposed to be due to the theoretically predicted different orientations of chemical bonds in the cores of N and Ga partials of the dissociated a‐screw dislocation.

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