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Deep-Level Structure of the Spin-Active Recombination Center in Dilute Nitrides. | LitMetric

Deep-Level Structure of the Spin-Active Recombination Center in Dilute Nitrides.

Phys Rev Lett

Laboratoire de physique de la matière condensée, CNRS, Ecole Polytechnique, IP Paris, 91128 Palaiseau, France.

Published: May 2024

A gallium interstitial defect is thought to be responsible for the spectacular spin-dependent recombination in GaAs_{1-x}N_{x} dilute nitrides. Current understanding associates this defect with at least two in-gap levels corresponding to the (+/0) and (++/+) charge-state transitions. Using a spin-sensitive photoinduced current transient spectroscopy, the in-gap electronic structure of a x=0.021 alloy is revealed. The (+/0) state lies ≈0.27  eV below the conduction band edge, and an anomalous, negative activation energy reveals the presence of not one but two other in-gap states. The observations are consistent with a (++/+) state ≈0.19  eV above the valence band edge, and a (+++/++) state ≈25  meV above the valence band edge.

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Source
http://dx.doi.org/10.1103/PhysRevLett.132.186402DOI Listing

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