• Journal of Infrared and Millimeter Waves
  • Vol. 31, Issue 3, 222 (2012)
WANG QingYu1、*, REN XiuRong1, LI MaoSen1, XU DeZheng1, and ZHA FangXing1、2
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    DOI: 10.3724/sp.j.1010.2012.00222 Cite this Article
    WANG QingYu, REN XiuRong, LI MaoSen, XU DeZheng, ZHA FangXing. Scanning tunneling spectra for the etched surface of ptype HgCdTe[J]. Journal of Infrared and Millimeter Waves, 2012, 31(3): 222 Copy Citation Text show less

    Abstract

    Ultrahigh vacuum scanning tunneling microscopy(STM) and spectroscopy (STS)were used to characterize Hg1-xCdxTe grown by liquidphase epitaxy (LPE) method. The sample was etched with 3% Brominemethanol in 2.5 minutes. The STM images display submicrometersized pit structures with depths ranging from a few tens to a few hundreds nanometers. The scanning tunneling spectra show a larger apparent gap than the energy band gap of the bulk material due to the tipinduced band bending effect. In contrast, the scanning tunneling spectra of the pits show a finite slope through zero volt, implying the contribution of high density of band gap states which blur out the band gap information.
    WANG QingYu, REN XiuRong, LI MaoSen, XU DeZheng, ZHA FangXing. Scanning tunneling spectra for the etched surface of ptype HgCdTe[J]. Journal of Infrared and Millimeter Waves, 2012, 31(3): 222
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