P-type electrical transport properties and excellent Hall mobility of GaSb single crystal grown by Ga flux

IF 3.5 2区 物理与天体物理 Q2 PHYSICS, APPLIED
Yu Zhao, Yongqiang Pan, Li Chen, Ming Cheng, Lanxin Liu, Lei Zhang, Ranran Zhang, Xiaoguang Zhu, Wenhai Song, Xuan Luo, Yuping Sun
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引用次数: 0

Abstract

Semiconductor materials, especial the Gallium antimonide (GaSb), have many unique properties and potential application, which attracted significant research interest. However, GaSb single crystal always shows a lower mobility due to the intrinsic defects, which greatly limits its application in electronic and optoelectronic devices. Here, GaSb single crystal has been grown by the Ga as the self-flux method. The properties of temperature dependent structure and surface morphology have been systematically investigated. The temperature dependent vibration modes of longitudinal optical and transverse optical were studied with Raman spectra. The thermal conductivity and thermoelectric measurements were on GaSb single crystal. The thermoelectric results revealed the Seebeck coefficient (S) is 552 μV/K at 300 K, which is conducive to thermoelectric property. The electrical resistivity and Hall coefficient display semiconducting behaviors with energy gaps of 34.5 and 29.2 meV, respectively. In particular, the Hall mobility reaches 1066 cm2/V·s at 300 K, which is superior than most of the GaSb single crystals grown by other methods. The mechanism of high Hall mobility related to the native defect concentration and dislocation density on the GaSb single crystal was discussed.
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来源期刊
Applied Physics Letters
Applied Physics Letters 物理-物理:应用
CiteScore
6.40
自引率
10.00%
发文量
1821
审稿时长
1.6 months
期刊介绍: Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.
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