Transport of indirect excitons in high magnetic fields

Kuznetsova, Y. Y., Dorow, C. J., Calman, E. V., Butov, L. V., Wilkes, Joe ORCID: https://orcid.org/0000-0001-6776-9162, Muljarov, Egor A. ORCID: https://orcid.org/0000-0002-2878-4148, Campman, K. L. and Gossard, A. C. 2017. Transport of indirect excitons in high magnetic fields. Physical Review B 95 (12) , 125304. 10.1103/PhysRevB.95.125304

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Abstract

We present spatially and spectrally resolved photoluminescence measurements of indirect excitons in high magnetic fields. Long indirect exciton lifetimes give the opportunity to measure magnetoexciton transport by optical imaging. Indirect excitons formed from electrons and holes at zeroth Landau levels (0e−0h indirect magnetoexcitons) travel over large distances and form a ring emission pattern around the excitation spot. In contrast, the spatial profiles of 1e−1h and 2e−2h indirect magnetoexciton emission closely follow the laser excitation profile. The 0e−0h indirect magnetoexciton transport distance reduces with increasing magnetic field. These effects are explained in terms of magnetoexciton energy relaxation and effective mass enhancement.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	American Physical Society
ISSN:	2469-9950
Funders:	EPSRC
Date of First Compliant Deposit:	30 March 2017
Date of Acceptance:	16 December 2016
Last Modified:	05 May 2023 16:18
URI:	https://orca.cardiff.ac.uk/id/eprint/99046

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