Determination of the electron trap level in Fe-doped GaN by phonon-assisted conduction phenomenon
Abstract We acoustically measured the energy level for thermally activated conduction (TAC) in high-resistivity Fe-doped GaN using the non-contacting antenna-transmission acoustic-resonance method. The acoustic attenuation takes a maximum at a specific temperature, where the TAC is accelerated with...
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Published in | Applied physics express Vol. 15; no. 7; pp. 71003 - 71007 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
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IOP Publishing
01.07.2022
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Abstract | Abstract
We acoustically measured the energy level for thermally activated conduction (TAC) in high-resistivity Fe-doped GaN using the non-contacting antenna-transmission acoustic-resonance method. The acoustic attenuation takes a maximum at a specific temperature, where the TAC is accelerated with the help of phonon energy. The Debye-type relaxation is thus observed for acoustic attenuation, and its activation energy (0.54
±
0.04 eV) was determined with attenuation measurements at various frequencies and temperatures. This value agrees with the E3 level in GaN, indicating that thermally associated conduction originates from the E3 trap level. We also measured the five independent elastic constants at high temperatures. |
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AbstractList | Abstract
We acoustically measured the energy level for thermally activated conduction (TAC) in high-resistivity Fe-doped GaN using the non-contacting antenna-transmission acoustic-resonance method. The acoustic attenuation takes a maximum at a specific temperature, where the TAC is accelerated with the help of phonon energy. The Debye-type relaxation is thus observed for acoustic attenuation, and its activation energy (0.54
±
0.04 eV) was determined with attenuation measurements at various frequencies and temperatures. This value agrees with the E3 level in GaN, indicating that thermally associated conduction originates from the E3 trap level. We also measured the five independent elastic constants at high temperatures. |
Author | Usami, Shigeyoshi Fukuda, Hiroki Adachi, Kanta Ogi, Hirotsugu Mori, Yusuke Imanishi, Masayuki Nagakubo, Akira Ikeda, Masashi Yoshimura, Masashi |
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Snippet | Abstract
We acoustically measured the energy level for thermally activated conduction (TAC) in high-resistivity Fe-doped GaN using the non-contacting... |
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SubjectTerms | Acoustic method elastic constants electron trap level GaN internal friction non-contacting measurement |
Title | Determination of the electron trap level in Fe-doped GaN by phonon-assisted conduction phenomenon |
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