Coherent ultrafast spin-dynamics probed in three dimensional topological insulators

Topological insulators are candidates to open up a novel route in spin based electronics. Different to traditional ferromagnetic materials, where the carrier spin-polarization and magnetization are based on the exchange interaction, the spin properties in topological insulators are based on the coup...

Full description

Bibliographic Details
Main Authors:	Boschini, F., Mansurova, M., Mussler, G., Kampmeier, J., Grützmacher, D., Braun, L., Katmis, F., Moodera, J. S., Dallera, C., Carpene, E., Franz, C., Czerner, M., Heiliger, C., Kampfrath, T., Münzenberg, M.
Format:	Online
Language:	English
Published:	Nature Publishing Group 2015
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4625143/

id	pubmed-4625143
recordtype	oai_dc
spelling	pubmed-46251432015-11-03 Coherent ultrafast spin-dynamics probed in three dimensional topological insulators Boschini, F. Mansurova, M. Mussler, G. Kampmeier, J. Grützmacher, D. Braun, L. Katmis, F. Moodera, J. S. Dallera, C. Carpene, E. Franz, C. Czerner, M. Heiliger, C. Kampfrath, T. Münzenberg, M. Article Topological insulators are candidates to open up a novel route in spin based electronics. Different to traditional ferromagnetic materials, where the carrier spin-polarization and magnetization are based on the exchange interaction, the spin properties in topological insulators are based on the coupling of spin- and orbit interaction connected to its momentum. Specific ways to control the spin-polarization with light have been demonstrated: the energy momentum landscape of the Dirac cone provides spin-momentum locking of the charge current and its spin. We investigate a spin-related signal present only during the laser excitation studying real and imaginary part of the complex Kerr angle by disentangling spin and lattice contributions. This coherent signal is only present at the time of the pump-pulses’ light field and can be described in terms of a Raman coherence time. The Raman transition involves states at the bottom edge of the conduction band. We demonstrate a coherent femtosecond control of spin-polarization for electronic states at around the Dirac cone. Nature Publishing Group 2015-10-29 /pmc/articles/PMC4625143/ /pubmed/26510509 http://dx.doi.org/10.1038/srep15304 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Boschini, F. Mansurova, M. Mussler, G. Kampmeier, J. Grützmacher, D. Braun, L. Katmis, F. Moodera, J. S. Dallera, C. Carpene, E. Franz, C. Czerner, M. Heiliger, C. Kampfrath, T. Münzenberg, M.
spellingShingle	Boschini, F. Mansurova, M. Mussler, G. Kampmeier, J. Grützmacher, D. Braun, L. Katmis, F. Moodera, J. S. Dallera, C. Carpene, E. Franz, C. Czerner, M. Heiliger, C. Kampfrath, T. Münzenberg, M. Coherent ultrafast spin-dynamics probed in three dimensional topological insulators
author_facet	Boschini, F. Mansurova, M. Mussler, G. Kampmeier, J. Grützmacher, D. Braun, L. Katmis, F. Moodera, J. S. Dallera, C. Carpene, E. Franz, C. Czerner, M. Heiliger, C. Kampfrath, T. Münzenberg, M.
author_sort	Boschini, F.
title	Coherent ultrafast spin-dynamics probed in three dimensional topological insulators
title_short	Coherent ultrafast spin-dynamics probed in three dimensional topological insulators
title_full	Coherent ultrafast spin-dynamics probed in three dimensional topological insulators
title_fullStr	Coherent ultrafast spin-dynamics probed in three dimensional topological insulators
title_full_unstemmed	Coherent ultrafast spin-dynamics probed in three dimensional topological insulators
title_sort	coherent ultrafast spin-dynamics probed in three dimensional topological insulators
description	Topological insulators are candidates to open up a novel route in spin based electronics. Different to traditional ferromagnetic materials, where the carrier spin-polarization and magnetization are based on the exchange interaction, the spin properties in topological insulators are based on the coupling of spin- and orbit interaction connected to its momentum. Specific ways to control the spin-polarization with light have been demonstrated: the energy momentum landscape of the Dirac cone provides spin-momentum locking of the charge current and its spin. We investigate a spin-related signal present only during the laser excitation studying real and imaginary part of the complex Kerr angle by disentangling spin and lattice contributions. This coherent signal is only present at the time of the pump-pulses’ light field and can be described in terms of a Raman coherence time. The Raman transition involves states at the bottom edge of the conduction band. We demonstrate a coherent femtosecond control of spin-polarization for electronic states at around the Dirac cone.
publisher	Nature Publishing Group
publishDate	2015
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4625143/
_version_	1613494564929142784

Coherent ultrafast spin-dynamics probed in three dimensional topological insulators

Similar Items