Growth condition optimization and mobility enhancement through inserting AlAs monolayer in the InP-based In_xGa_（1-x）As/In_（0.52）Al_（0.48）As HEMT structures

The structure of In P-based In_xGa_（1-x） As/In0.52Al0.48 As pseudomorphic high electron mobility transistor（PHEMT）was optimized in detail.Effects of growth temperature,growth interruption time,Si δ-doping condition,channel thickness and In content,and inserted Al As monolayer（ML） on the two-dimensio...

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Published in:中国物理B：英文版 2016 (9), p.474-479
Main Author: 周书星 齐鸣 艾立鹍 徐安怀
Format: Article
Language:English
Subjects:
InP基
PHEMT
优化
单层
生长条件
电子结构
赝配高电子迁移率晶体管
铝膜
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description The structure of In P-based In_xGa_（1-x） As/In0.52Al0.48 As pseudomorphic high electron mobility transistor（PHEMT）was optimized in detail.Effects of growth temperature,growth interruption time,Si δ-doping condition,channel thickness and In content,and inserted Al As monolayer（ML） on the two-dimensional electron gas（2DEG） performance were investigated carefully.It was found that the use of the inserted Al As monolayer has an enhancement effect on the mobility due to the reduction of interface roughness and the suppression of Si movement.With optimization of the growth parameters,the structures composed of a 10 nm thick In0.75Ga0.25 As channel layer and a 3 nm thick Al As/In0.52Al0.48 As superlattices spacer layer exhibited electron mobilities as high as 12500 cm~2·V-1·s~（-1）（300 K） and 53500 cm~2·V~（-1_·s~（-1）（77 K） and the corresponding sheet carrier concentrations（Ns） of 2.8×10~（12）cm~（-2）and 2.9×1012cm~（-2）,respectively.To the best of the authors＇ knowledge,this is the highest reported room temperature mobility for In P-based HEMTs with a spacer of 3 nm to date.
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subjects InP基
PHEMT
优化
单层
生长条件
电子结构
赝配高电子迁移率晶体管
铝膜
title Growth condition optimization and mobility enhancement through inserting AlAs monolayer in the InP-based In_xGa_（1-x）As/In_（0.52）Al_（0.48）As HEMT structures
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