Growth and characterisation of substrate-stabilised heteroepitaxial grey tin films

L. W. Tu; G. K. Wong; S. N. Song; Z. Zhao; John B Ketterson

doi:10.1088/0268-1242/5/3S/053

Growth and characterisation of substrate-stabilised heteroepitaxial grey tin films

L. W. Tu^*, G. K. Wong, S. N. Song, Z. Zhao, John B Ketterson

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

The authors report molecular beam epitaxy growth of grey tin films on (001)CdTe substrates. The transverse magnetoresistance and Hall effect have been studied. Films thinner than 400 AA are p-type with carrier densities of (1-2)*10¹⁹ cm^-3; thicker films are n-type with carrier densities as low as 2*10¹⁷ cm^-3 Shubnikov-de Haas (SDH) oscillations are observed in samples having Hall mobilities >or=10⁴ cm² V^-1 s^-1 at low temperatures. Beat patterns are observed in the SDH spectra, which they ascribe to either inhomogeneous doping, arising from the diffusion of Cd and Te from the substrate, or quantisation of the motion in the direction parallel to the film normal. For field directions at 45 degrees and 90 degrees to the film plane normal, clear SDH oscillations are also observed at fields much lower than the expected size effect cut-off field, implying that specular reflection at the film boundaries plays a significant role.

Original language	English (US)
Article number	053
Journal	Semiconductor Science and Technology
Volume	5
Issue number	3 S
DOIs	https://doi.org/10.1088/0268-1242/5/3S/053
State	Published - Dec 1 1990

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/0268-1242/5/3S/053

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title = "Growth and characterisation of substrate-stabilised heteroepitaxial grey tin films",

abstract = "The authors report molecular beam epitaxy growth of grey tin films on (001)CdTe substrates. The transverse magnetoresistance and Hall effect have been studied. Films thinner than 400 AA are p-type with carrier densities of (1-2)*1019 cm-3; thicker films are n-type with carrier densities as low as 2*1017 cm-3 Shubnikov-de Haas (SDH) oscillations are observed in samples having Hall mobilities >or=104 cm2 V-1 s-1 at low temperatures. Beat patterns are observed in the SDH spectra, which they ascribe to either inhomogeneous doping, arising from the diffusion of Cd and Te from the substrate, or quantisation of the motion in the direction parallel to the film normal. For field directions at 45 degrees and 90 degrees to the film plane normal, clear SDH oscillations are also observed at fields much lower than the expected size effect cut-off field, implying that specular reflection at the film boundaries plays a significant role.",

author = "Tu, {L. W.} and Wong, {G. K.} and Song, {S. N.} and Z. Zhao and Ketterson, {John B}",

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T1 - Growth and characterisation of substrate-stabilised heteroepitaxial grey tin films

AU - Tu, L. W.

AU - Wong, G. K.

AU - Song, S. N.

AU - Zhao, Z.

AU - Ketterson, John B

PY - 1990/12/1

Y1 - 1990/12/1

N2 - The authors report molecular beam epitaxy growth of grey tin films on (001)CdTe substrates. The transverse magnetoresistance and Hall effect have been studied. Films thinner than 400 AA are p-type with carrier densities of (1-2)*1019 cm-3; thicker films are n-type with carrier densities as low as 2*1017 cm-3 Shubnikov-de Haas (SDH) oscillations are observed in samples having Hall mobilities >or=104 cm2 V-1 s-1 at low temperatures. Beat patterns are observed in the SDH spectra, which they ascribe to either inhomogeneous doping, arising from the diffusion of Cd and Te from the substrate, or quantisation of the motion in the direction parallel to the film normal. For field directions at 45 degrees and 90 degrees to the film plane normal, clear SDH oscillations are also observed at fields much lower than the expected size effect cut-off field, implying that specular reflection at the film boundaries plays a significant role.

AB - The authors report molecular beam epitaxy growth of grey tin films on (001)CdTe substrates. The transverse magnetoresistance and Hall effect have been studied. Films thinner than 400 AA are p-type with carrier densities of (1-2)*1019 cm-3; thicker films are n-type with carrier densities as low as 2*1017 cm-3 Shubnikov-de Haas (SDH) oscillations are observed in samples having Hall mobilities >or=104 cm2 V-1 s-1 at low temperatures. Beat patterns are observed in the SDH spectra, which they ascribe to either inhomogeneous doping, arising from the diffusion of Cd and Te from the substrate, or quantisation of the motion in the direction parallel to the film normal. For field directions at 45 degrees and 90 degrees to the film plane normal, clear SDH oscillations are also observed at fields much lower than the expected size effect cut-off field, implying that specular reflection at the film boundaries plays a significant role.

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Growth and characterisation of substrate-stabilised heteroepitaxial grey tin films

Abstract

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