Physical mechanisms of the influence of γ-ray surface treatment on the characteristics of close AuNi/n-n+-GaN Schottky contacts

Physical mechanisms of the influence of γ-ray surface treatment on the characteristics of close AuNi/n-n+-GaN Schottky contacts

Bibliographic Details
Parent link:Semiconductor Science and Technology
Vol. 37, iss. 10.— 2022.— [105005, 18 p.]
Corporate Author: Национальный исследовательский Томский политехнический университет Инженерная школа ядерных технологий Отделение экспериментальной физики
Other Authors: Torkhov N. A. Nikolay Aleksandrovich, Gradoboev A. V. Aleksandr Vasilyevich, Budnaev V. Vadim, Ivonin I. V. Ivan Varfolomeevich, Novikov V. A. Vadim Aleksandrovich
Summary:Title screen
The results obtained here suggest that low-dose 60Co γ-irradiation (Dγ∼ 140 Gy) has a complex effect on close AuNi/n-n+-GaN{0001} Schottky contacts. This manifests in the disappearance of current steps in the initial section of the forward current-voltage curve, improvement in the average values of the ideality factor n, a decrease in the average values of the true Schottky barrier height ϕbn in the middle section and an increase in series resistance RS and enhancement of the inhomogeneous metal-semiconductor contact series resistance effect in the final section. In all cases, the observed changes are sustainable. A combination of the Zur-McGill-Smith close Schottky contact defect model, the inhomogeneous contact model and the radiation-induced defect formation model provides an explanation for the physical mechanisms of changes observed in electrophysical and instrumental characteristics after γ-irradiation. Such mechanisms are associated with changes in the electrophysical nature of GaN structural defects (dislocations and interface states) and degradation of the homogeneity of contact conductivity. This paper shows that the low-temperature anomaly also manifests itself in close AuNi/n-n+-GaN Schottky contacts subjected to γ-irradiation.
Режим доступа: по договору с организацией-держателем ресурса
Published: 2022
Subjects:
электронный ресурс
труды учёных ТПУ
Online Access:https://doi.org/10.1088/1361-6641/ac7d71
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=669559

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