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Terahertz quantum Hall effect for spin-split heavy-hole gases in strained Ge quantum wells
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Failla, Michele, Kelleher, J., Scalari, G., Maissen, C., Faist, J., Reichl, C., Wegscheider, W., Newell, Oliver, Leadley, D. R. (David R.), Myronov, Maksym and Lloyd-Hughes, James (2016) Terahertz quantum Hall effect for spin-split heavy-hole gases in strained Ge quantum wells. New Journal of Physics, 18 (11). 113036. doi:10.1088/1367-2630/18/11/113036 ISSN 1367-2630.
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Official URL: http://dx.doi.org/10.1088/1367-2630/18/11/113036
Abstract
Spin-split heavy-hole gases in strained germanium quantum wells were characterized by polarisation-resolved terahertz time-domain spectroscopy. Effective masses, carrier densities, g-factors, transport lifetimes, mobilities and Rashba spin-splitting energies were evaluated, giving quantitative insights into the influence of strain. The Rashba coefficient was found to lower for samples with higher biaxial compressive strain, while heavy-hole mobilities were enhanced to over $1.5\times {10}^{6}$ cm2 Vā1 sā1 at 3 K. This high mobility enabled the observation of the optical quantum Hall effect at terahertz frequencies for spin-split two-dimensional heavy-holes, evidenced as plateaux in the transverse magnetoconductivity at even and odd filling factors.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QC Physics | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Library of Congress Subject Headings (LCSH): | Terahertz spectroscopy | ||||||||
Journal or Publication Title: | New Journal of Physics | ||||||||
Publisher: | IOP Publishing | ||||||||
ISSN: | 1367-2630 | ||||||||
Official Date: | 21 November 2016 | ||||||||
Dates: |
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Volume: | 18 | ||||||||
Number: | 11 | ||||||||
Article Number: | 113036 | ||||||||
DOI: | 10.1088/1367-2630/18/11/113036 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||
Date of first compliant deposit: | 17 January 2017 | ||||||||
Date of first compliant Open Access: | 17 January 2017 | ||||||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC), European Research Council (ERC) | ||||||||
Grant number: | EP/J003263/1 (EPSRC) |
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