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Spin-coherent dynamics and carrier lifetime in strained Ge1−xSnx semiconductors on silicon
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De Cesari, S., Balocchi, A., Vitiello, E., Jahandar, P., Grilli, E., Amand, T., Marie, X., Myronov, Maksym and Pezzoli, F. (2019) Spin-coherent dynamics and carrier lifetime in strained Ge1−xSnx semiconductors on silicon. Physical Review B (Condensed Matter and Materials Physics), 99 (3). 035202 . doi:10.1103/PhysRevB.99.035202 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.99.035202
Abstract
We demonstrate an effective epitaxial route for the manipulation and further enrichment of the intriguing spin-dependent phenomena boasted by germanium. We show optical initialization and readout of spins in Ge-rich germanium-tin alloys and report on spin quantum beats between Zeeman-split levels under an external magnetic field. While heavy Sn atoms can be readily utilized to strengthen the spin-orbit coupling, our experiments reveal robust spin orientation in a wide temperature range and a persistent spin lifetime that noticeably approaches the nanosecond regime at room temperature. In addition, time decay photoluminescence experiments evidence a temperature-induced monotonic decrease of the carrier lifetime, eventually providing crucial insights also into nonradiative recombination mechanisms.
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): | Semiconductors , Silicon, Germanium | |||||||||
Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | |||||||||
Publisher: | American Physical Society | |||||||||
ISSN: | 1098-0121 | |||||||||
Official Date: | 10 January 2019 | |||||||||
Dates: |
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Volume: | 99 | |||||||||
Number: | 3 | |||||||||
Article Number: | 035202 | |||||||||
DOI: | 10.1103/PhysRevB.99.035202 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||
Copyright Holders: | © 2019 American Physical Society | |||||||||
Date of first compliant deposit: | 18 January 2019 | |||||||||
Date of first compliant Open Access: | 18 January 2019 | |||||||||
RIOXX Funder/Project Grant: |
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