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Electronic transport anisotropy of 2D carriers in biaxial compressive strained germanium
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Morrison, Christopher and Myronov, Maksym (2017) Electronic transport anisotropy of 2D carriers in biaxial compressive strained germanium. Applied Physics Letters, 111 (19). 192103. doi:10.1063/1.5010933 ISSN 0003-6951.
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Official URL: http://dx.doi.org/10.1063/1.5010933
Abstract
The anisotropic nature of carrier mobility in simple cubic crystalline semiconductors, such as technologically important silicon and germanium, is well understood as a consequence of effective mass anisotropy arising from a change in band structure along non-identical surface crystal directions. In contrast to this, we show experimentally that this type of anisotropy is not the dominant contribution. Recent advances in epitaxial growth of high quality germanium enabled the appearance of high mobility 2D carriers suitable for such an experiment. A strong anisotropy of 2D carrier mobility, effective mass, quantum, and transport lifetime has been observed, through measurements of quantum phenomena at low temperatures, between the ⟨110⟩ and ⟨100⟩ in-plane crystallographic directions. These results have important consequences for electronic devices and sensor designs and suggest similar effects could be observed in technologically relevant and emerging materials such as SiGe, SiC, GeSn, GeSnSi, and C (Diamond).
Item Type: | Journal Article | ||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
Library of Congress Subject Headings (LCSH): | Anisotropy, Germanium, Silicon, Semiconductors | ||||||
Journal or Publication Title: | Applied Physics Letters | ||||||
Publisher: | American Institute of Physics | ||||||
ISSN: | 0003-6951 | ||||||
Official Date: | November 2017 | ||||||
Dates: |
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Volume: | 111 | ||||||
Number: | 19 | ||||||
Article Number: | 192103 | ||||||
DOI: | 10.1063/1.5010933 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 9 November 2017 | ||||||
Date of first compliant Open Access: | 9 November 2017 | ||||||
RIOXX Funder/Project Grant: |
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