Observation of spin-valley-coupling-induced large spin-lifetime anisotropy in bilayer graphene

URN to cite this document:: urn:nbn:de:bvb:355-epub-438327
DOI to cite this document:: 10.5283/epub.43832

Leutenantsmeyer, J. C. ; Ingla-Aynes, J. ; Fabian, Jaroslav

; van Wees, Bart J.

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Date of publication of this fulltext: 28 Sep 2020 05:24

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Abstract

We report the first observation of a large spin-lifetime anisotropy in bilayer graphene (BLG) fully encapsulated between hexagonal boron nitride. We characterize the out-of-plane (τ⊥) and in-plane (τ∥) spin lifetimes by oblique Hanle spin precession. At 75 K and the charge neutrality point (CNP), we observe a strong anisotropy of τ⊥/τ∥=8±2. This value is comparable to ...