https://scholars.lib.ntu.edu.tw/handle/123456789/616413
Title: | Electronic structure of oxidized Ni/Au contacts on p-GaN investigated by x-ray absorption spectroscopy | Authors: | Jan J.C. Chen L.C. LI-CHYONG CHEN |
Issue Date: | 2001 | Journal Volume: | 78 | Journal Issue: | 18 | Start page/Pages: | 2718-2720 | Source: | Applied Physics Letters | Abstract: | X-ray absorption spectroscopy has been used to investigate the electronic structure of as-deposited and oxidized Ni/Au contacts on p-GaN. The Ni K-, L2,3-, and O K-edges x-ray absorption spectra clearly show the formation of NiO in the annealed contacts. Annealing in air increases Ni-site hole concentration and slightly shortens the nearest-neighbor Ni-O bond length, which enhances p-d hybridization and charge transfer from Ni to O. The observed very low specific contact resistance in the oxidized contacts is found to be due to the enhanced hole concentration at the Ni site. © 2001 American Institute of Physics. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-18044404197&doi=10.1063%2f1.1370121&partnerID=40&md5=344658e3418d1fe6cf47c5ce17a5560b https://scholars.lib.ntu.edu.tw/handle/123456789/616413 |
ISSN: | 00036951 | DOI: | 10.1063/1.1370121 |
Appears in Collections: | 凝態科學研究中心 |
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