Transport properties of Hg0.80Mg0.20Te grown by molecular beam epitaxy

Variable magnetic-field Hall measurement has been used to investigate the transport properties in Hg0.80Mg0.20Te molecular beam epitaxy films in the temperature range from 1.5 to 250 K. The experimental data have been analyzed by using a hybrid approach consisting of the mobility spectrum (MS) techn...

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Published in:Journal of applied physics 1998-12, Vol.84 (11), p.6170-6173
Main Authors: Gui, Yongsheng, Li, Biao, Zheng, Guozhen, Guo, Shaoling, Chu, Junhao, Oehling, S., Becker, C. R., Landwehr, G.
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container_end_page 6173
container_issue 11
container_start_page 6170
container_title Journal of applied physics
container_volume 84
creator Gui, Yongsheng
Li, Biao
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Landwehr, G.
description Variable magnetic-field Hall measurement has been used to investigate the transport properties in Hg0.80Mg0.20Te molecular beam epitaxy films in the temperature range from 1.5 to 250 K. The experimental data have been analyzed by using a hybrid approach consisting of the mobility spectrum (MS) technique followed by a multicarrier fitting (MCF) procedure. Both the Shubnikov–de Haas measurements and the hybrid MS+MCF approach show three- and two-dimensional electronic behaviors. The two-dimensional electrons, with mobility in the range of 1–3×103 cm2/V s and a sheet density about 1012 cm−2, are found and come from an accumulation layer near the HgMgTe–CdTe interface or the HgMgTe–vacuum interface. The temperature-dependent evolution of the bulk electron mobility indicates that the scattering mechanism in HgMgTe is very similar to that in HgCdTe, that is, ionized impurity scattering dominates at low temperature while lattice scattering dominates above 100 K.
doi_str_mv 10.1063/1.368932
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title Transport properties of Hg0.80Mg0.20Te grown by molecular beam epitaxy
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