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Narrow heavy-hole cyclotron resonances split by the cubic Rashba spin-orbit interaction in strained germanium quantum wells
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Failla, Michele, Myronov, Maksym, Morrison, Christopher, Leadley, D. R. (David R.) and Lloyd-Hughes, James (2015) Narrow heavy-hole cyclotron resonances split by the cubic Rashba spin-orbit interaction in strained germanium quantum wells. Physical Review B (Condensed Matter and Materials Physics), 92 (4). 045303. doi:10.1103/PhysRevB.92.045303 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.92.045303
Abstract
The spin-orbit interaction was found to split the cyclotron resonance of heavy holes confined in high-mobility, compressively strained germanium quantum wells. The interference between coherent spin-split cyclotron resonances was tracked on picosecond time scales using terahertz time-domain spectroscopy. Analysis in the time domain, or using a time-frequency decomposition based on the Gabor-Morlet wavelet, was necessary when the difference between cyclotron frequencies was comparable to the linewidth. The cubic Rashba spin-orbit coefficient β was determined via two methods: (i) the magnetic-field dependence of the cyclotron frequencies, and (ii) the spin-resolved subband densities. An enhanced β and spin polarization was created by tailoring the strain to enhance the spin-orbit interaction. The amplitude modulation of the narrow, interfering cyclotron resonances is a signature of spin coherences persisting for more than 10 ps.
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): | Cyclotron resonance | ||||||
Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||||
Publisher: | American Physical Society | ||||||
ISSN: | 1098-0121 | ||||||
Official Date: | 14 July 2015 | ||||||
Dates: |
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Volume: | 92 | ||||||
Number: | 4 | ||||||
Number of Pages: | 6 | ||||||
Article Number: | 045303 | ||||||
DOI: | 10.1103/PhysRevB.92.045303 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
Date of first compliant deposit: | 31 December 2015 | ||||||
Date of first compliant Open Access: | 31 December 2015 | ||||||
Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||||
Grant number: | EP/H003444/2 (EPSRC), EP/J003263/1 (EPSRC) |
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