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Chin. Phys. B, 2010, Vol. 19(7): 077301    DOI: 10.1088/1674-1056/19/7/077301
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Energy band alignment of PbTe/CdTe(111) interface determined by ultraviolet photoelectron spectra using synchrotron radiation

Cai Chun-Feng(蔡春锋)a), Wu Hui-Zhen(吴惠桢) a)†, Si Jian-Xiao(斯剑霄)b), Jin Shu-Qiang(金树强)a), Zhang Wen-Hua(张文华)c), Xu Yang(许杨)c), and Zhu Jun-Fa(朱骏发)c)
a Department of Physics, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China; b College of Physics and Mathematics, Zhejiang Normal University, Jinhua 321004, China; c National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
Abstract  The energy band structure with type-I alignment at the PbTe/CdTe(111) heterojunction interface is determined by the ultraviolet photoelectron spectrum using synchrotron radiation. The valence band and conduction band offsets are obtained to be 0.09±0.12 and 1.19±0.12 eV, respectively. These results are in agreement with theoretically predicted ones. The accurate determination of the valence band and conduction band offsets is useful for the fundamental understanding of the mid-infrared light emission from the PbTe/CdTe heterostructures and its application in devices.
Keywords:  valence band offset      ultraviolet photoelectron spectra      synchrotron radiation  
Revised:  16 December 2009      Accepted manuscript online: 
PACS:  71.20.Nr (Semiconductor compounds)  
  73.40.Lq (Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)  
  79.60.Bm (Clean metal, semiconductor, and insulator surfaces)  
  79.60.Jv (Interfaces; heterostructures; nanostructures)  
  78.67.De (Quantum wells)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10974174 and 60676003).

Cite this article: 

Cai Chun-Feng(蔡春锋), Wu Hui-Zhen(吴惠桢), Si Jian-Xiao(斯剑霄), Jin Shu-Qiang(金树强), Zhang Wen-Hua(张文华), Xu Yang(许杨), and Zhu Jun-Fa(朱骏发) Energy band alignment of PbTe/CdTe(111) interface determined by ultraviolet photoelectron spectra using synchrotron radiation 2010 Chin. Phys. B 19 077301

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