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In-situ potential mapping of space charge layer in GaN nanowires under electrical field by off-axis electron holography
×÷Õß:Chen, X (Chen, Xiao)[ 1,2 ] ; Wang, YG (Wang, Yanguo)[ 2 ] ; Guo, J (Guo, Jie)[ 3 ] ; Jian, JK (Jian, Jikang)[ 3 ] ; Gu, L (Gu, Lin)[ 2,4 ] ; Zhang, ZH (Zhang, Zhihua)[ 1 ]


PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL


¾í: 26
ÆÚ: 2
Ò³: 163-168
DOI: 10.1016/j.pnsc.2016.03.009

³ö°æÄê: APR 2016

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PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL  

³ö°æÉÌ ELSEVIER SCIENCE INC, 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA

ISSN: 1002-0071
eISSN: 1745-5391

Ñо¿ÁìÓò Materials Science
Science & Technology - Other Topics



ÕªÒª
In situ potential mapping of space charge (SC) layer in a single GaN nanowire (NW) contacted to the Au metal electrode has been conducted using off-axis electron holography in order to study the space distribution of SC layer under electric biases. Based on the phase image reconstructed from the complex hologram the electrostatic potential at the SC layer was clearly revealed; the SC width was estimated to be about 76 nm under zero bias condition. In order to study dynamic interrelation between the SC layer and bias conditions, the variation of the electrostatic potential due to change of the SC widths respond to the different bias conditions have also been examined. The measured SC layers are found to vary between 68 nm and 91 nm, which correspond to the saturated SC layers at the GaN-Au contact under the forward and reverse bias conditions, respectively. By plotting the square widths of the SC layer against the applied voltages, donor density of GaN NWs was derived to be about 4.3*10(6) cm(-3). Our experiments demonstrate that in-situ electron holography under electric field can be a useful method to investigate SC layers and donor density in single NW and other heterostructures. (C) 2016 Chinese Materials Research Society. Production and hosting by Elsevier B.V.

¹Ø¼ü´Ê
×÷Õ߹ؼü´Ê:Space charge layer; Electron holography; In-situ TEM; Semiconductor nanowire; Semiconductor-metal contact

KeyWords Plus:CAPACITANCE; DIODES; SCALE

×÷ÕßÐÅÏ¢
ͨѶ×÷ÕßµØÖ·: Zhang, ZH (ͨѶ×÷Õß) Dalian Jiaotong Univ, Liaoning Key Mat Lab Railway, Dalian 116028, Peoples R China.
  ÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ
    Dalian Jiaotong University  
ͨѶ×÷ÕßµØÖ·: Wang, YG (ͨѶ×÷Õß) Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
  ÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ
    Chinese Academy of Sciences  


µØÖ·:  [ 1 ] Dalian Jiaotong Univ, Liaoning Key Mat Lab Railway, Dalian 116028, Peoples R China
  ÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ
    Dalian Jiaotong University  
[ 2 ] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
  ÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ
    Chinese Academy of Sciences  
[ 3 ] Xinjiang Univ, Sch Phys Sci & Technol, Urumqi 830046, Peoples R China
  ÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ
    Xinjiang University  
       [ 4 ] Collaborat Innovat Ctr Quantum Matter, Beijing 100190, Peoples R China


µç×ÓÓʼþµØÖ·:ygwang@blcm.ac.cn; zhzhang@djtu.edu.cn

»ù½ð×ÊÖúÖÂл
»ù½ð×ÊÖú»ú¹¹ ÊÚȨºÅ
Major State Basic Research Development Program of China  2014CB921002
2012CB921702  
National Natural Science Foundation of China  11274365
51372027
51172193  
Strategic Priority Research Program of the Chinese Academy of Sciences  XDB07030200  
²é¿´»ù½ð×ÊÖúÐÅÏ¢¹Ø±Õ»ù½ð×ÊÖúÐÅÏ¢   

This work is supported by the Major State Basic Research Development Program of China under Contract nos. 2014CB921002 and 2012CB921702, the National Natural Science Foundation of China (Grant nos. 11274365, 51372027 and 51172193), and the Strategic Priority Research Program of the Chinese Academy of Sciences under Grant no. XDB07030200.

³ö°æÉÌ
ELSEVIER SCIENCE INC, 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA

Àà±ð / ·ÖÀà
Ñо¿·½Ïò:Materials Science; Science & Technology - Other Topics

Web of Science Àà±ð:Materials Science, Multidisciplinary; Multidisciplinary Sciences

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ÎÄÏ×ÀàÐÍ:Article

ÓïÖÖ:English

Èë²ØºÅ: WOS:000375607000007

ISSN: 1002-0071

eISSN: 1745-5391

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2Â¥: Originally posted by baiyuefei at 2016-09-01 13:17:52
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In-situ potential mapping of space charge layer in  ...

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