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Theis TN, Mooney PM. The DX Center: Evidence for Charge Capture Via an Excited Intermediate State. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-163-729] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractWe review three important experimental results which suggest that electron capture and emission by the DX center in AlxGa1-xAs proceeds via an excited intermediate state: the very different dependencies of the thermal capture and emission rates on alloy composition, the exponential dependence of the thermal capture rate on the quasi-equilibrium Fermi energy, and the thermal activation of the hot electron capture rate. None of these results is readily explained by a conventional lattice relaxation model, in which an electron is captured directly from the lowest lying band edge, but each can be simply explained if the dominant channel for multiphonon capture is via a transition state which lies well above the band edge. This picture is consistent with recent pseudopotential calculations which predict that the lattice relaxed state (the DX state) is stabilized by capture of more than one electron, since such a model naturally admits the possibility of an intermediate one-electron state.
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Saito M, Oshiyama A. Chemical trends and s-p hybridization in the DX center in GaAs. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:11804-11809. [PMID: 10007518 DOI: 10.1103/physrevb.48.11804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Saito M, Oshiyama A, Sugino O. Energetics and local vibrations of the DX center in GaAs. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:13205-13214. [PMID: 10005625 DOI: 10.1103/physrevb.47.13205] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Baraldi A, Ghezzi C, Parisini A, Bosacchi A, Franchi S. Low-temperature mobility of photoexcited electrons in AlxGa1-xAs containing DX centers. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:8713-8720. [PMID: 9998828 DOI: 10.1103/physrevb.44.8713] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Gil B, Leroux M, Contour JP, Chaix C. Modulation spectroscopy of the complex photoluminescence band of Ga0.7Al0.3As:Si. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:12335-12340. [PMID: 9997030 DOI: 10.1103/physrevb.43.12335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Zhang SB, Chadi DJ. Stability of DX centers in AlxGa1-xAs alloys. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:7174-7177. [PMID: 9994844 DOI: 10.1103/physrevb.42.7174] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Zazoui M, Alaya S, Gibart P. Electron-paramagnetic-resonance study of the Te donor in Ga0.70Al0.30As. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:1500-1503. [PMID: 9995578 DOI: 10.1103/physrevb.42.1500] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Zazoui M, Feng SL, Bourgoin JC. Energy level associated with the DX center in Ga1-xAlxAs. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:8485-8492. [PMID: 9993174 DOI: 10.1103/physrevb.41.8485] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bourgoin JC. Donors in semiconductors and metastability. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:10006-10008. [PMID: 9991539 DOI: 10.1103/physrevb.40.10006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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