Influences of lattice strain and SiGe buffer layer thickness on electrical characteristics of strained Si/SiGe/Si(110) heterostructures
Influences of lattice strain and SiGe buffer layer thickness on electrical characteristics of strained Si/SiGe/Si(110) heterostructures
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晶格应变和SiGe缓冲层厚度对应变Si/SiGe/Si(110)异质结构电学特性的影响
DOI:
10.1016/j.mssp.2023.107476
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发表时间:
2023
影响因子:
4.1
通讯作者:
Arimoto Keisuke
中科院分区:
文献类型:
--
作者:
Fujisawa Taisuke;Onogawa Atsushi;Horiuchi Miki;Sano Yuichi;Sakata Chihiro;Yamanaka Junji;Hara Kosuke O.;Sawano Kentarou;Nakagawa Kiyokazu;Arimoto Keisuke
In previous studies, we reported on significantly high hole mobility in a strained Si/SiGe/Si (110) heterostructure pMOSFET. In this study, we investigated impact of strain on the hole mobility in this structure. 20-nm thick (110)-oriented strained Si films with different strain levels were formed using solid-source molecular beam epitaxy. A positive correlation between the hole mobility and the strain of the Si layer is verified. It is also shown that formation of growth twins and strain relaxation of SiGe layer in the [1‾ 10] direction deteriorate the hole mobility. The maximum mobility enhancement factor obtained in this study is about 3. In addition, the influence of the SiGe layer thickness on the off-state leakage current in pMOSFET operation is discussed. It is found that the upper part of the thick SiGe samples includes cause of the leakage current, indicating change of conductivity with the progress of the crystal growth of SiGe layer. This phenomenon is related to the formation process of the crystalline defects. Another finding is the existence of a current path through the substrate, which suggests a defect-assisted current flow across the SiGe/n-Si (110) junction.
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影响因子:
3.2
作者:
Motoki Satoh;K. Arimoto;J. Yamanaka;K. Sawano;Y. Shiraki;K. Nakagawa
通讯作者:
K. Nakagawa
DOI:
10.1109/iedm.2009.5424318
发表时间:
2009
期刊:
2009 IEEE International Electron Devices Meeting (IEDM)
影响因子:
--
作者:
M. Saitoh;N. Yasutake;Y. Nakabayashi;K. Uchida;T. Numata
通讯作者:
T. Numata
影响因子:
4.1
作者:
Shingo Saito;Yuichi Sano;Takane Yamada;Kosuke O. Hara;Junji Yamanaka;Kiyokazu Nakagawa;Keisuke Arimoto
通讯作者:
Keisuke Arimoto
DOI:
10.1109/escinano.2012.6149706
发表时间:
2012
期刊:
International Conference on Enabling Science and Nanotechnology
影响因子:
--
作者:
M. Tan;M. Riyadi;V. Arora
通讯作者:
V. Arora
影响因子:
3.2
作者:
P. Grillot;S. Ringel;J. Michel;E. Fitzgerald
通讯作者:
E. Fitzgerald