Alloy Stability of Ge1−xSnx with Sn Concentrations up to 17% Utilizing Low-Temperature Molecular Beam Epitaxy
Alloy Stability of Ge1−xSnx with Sn Concentrations up to 17% Utilizing Low-Temperature Molecular Beam Epitaxy
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合金%20稳定性%20of%20Ge1âxSnx%20with%20Sn%20浓度%20up%20至%2017%%20利用%20低温%20分子%20光束%20外延
DOI:
10.1007/s11664-020-08188-6
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发表时间:
2020
影响因子:
2.1
通讯作者:
J. Schulze
中科院分区:
文献类型:
--
作者:
D. Schwarz;H. S. Funk;M. Oehme;J. Schulze
The binary alloy germanium tin has already been presented as a direct group IV semiconductor at high tin concentrations and specific strain. Therefore, it offers a promising approach for the monolithic integrated light source towards the optical on-chip communication on silicon. However, the main challenge faced by many researchers is the achievement of high tin concentrations and good crystal quality. The key issues are the lattice mismatch to silicon and germanium, as well as the limited solid solubility of tin in germanium of less than 1%. Therefore, this paper presents a systematic investigation of the epitaxial growth conditions of germanium tin with tin concentrations up to 17%. For this, we performed two growth experiments utilizing molecular beam epitaxy. In one experiment, we varied the growth temperature for the epitaxy of germanium tin with 8% tin to investigate the inter-growth temperature stability. In the second experiment, we focused on the strain-relaxation of germanium tin, depending on different tin concentrations and doping types. The results of subsequent material analysis with x-ray diffraction and scanning electron microscopy allow us to narrow the epitaxial window of germanium tin. Furthermore, we present a possible explanation for the unique relaxation mechanism of germanium tin, which is significantly different from the well-known relaxation mechanism of silicon germanium.
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影响因子:
2.1
作者:
Oehme, Michael;Kostecki, Konrad;Schulze, Joerg
通讯作者:
Schulze, Joerg
影响因子:
2.1
作者:
E. Kasper;M. Bauer;M. Oehme
通讯作者:
M. Oehme
影响因子:
2.1
作者:
M. Oehme;J. Werner;M. Jutzi;G. Wöhl;E. Kasper;M. Berroth
通讯作者:
M. Berroth
影响因子:
2.1
作者:
M. Oehme;J. Werner;M. Kaschel;O. Kirfel;E. Kasper
通讯作者:
E. Kasper
影响因子:
1.9
作者:
L. Jiang;J. Gallagher;C. L. Senaratne;T. Aoki;J. Mathews;J. Kouvetakis;J. Menéndez
通讯作者:
L. Jiang;J. Gallagher;C. L. Senaratne;T. Aoki;J. Mathews;J. Kouvetakis;J. Menéndez