Spin inversion in graphene spin valves by gate-tunable magnetic proximity effect at one-dimensional contacts

Nature Communications
Jinsong XuRoland K Kawakami

Abstract

Graphene has remarkable opportunities for spintronics due to its high mobility and long spin diffusion length, especially when encapsulated in hexagonal boron nitride (h-BN). Here, we demonstrate gate-tunable spin transport in such encapsulated graphene-based spin valves with one-dimensional (1D) ferromagnetic edge contacts. An electrostatic backgate tunes the Fermi level of graphene to probe different energy levels of the spin-polarized density of states (DOS) of the 1D ferromagnetic contact, which interact through a magnetic proximity effect (MPE) that induces ferromagnetism in graphene. In contrast to conventional spin valves, where switching between high- and low-resistance configuration requires magnetization reversal by an applied magnetic field or a high-density spin-polarized current, we provide an alternative path with the gate-controlled spin inversion in graphene.

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Citations

Aug 14, 2020·Science Advances·Roméo BonnetClément Barraud
Oct 9, 2018·Physical Review Letters·Jinsong XuRoland K Kawakami
Oct 24, 2020·Physical Review Letters·Gaofeng XuIgor Žutić
Sep 17, 2020·Science Advances·Roméo BonnetClément Barraud
Apr 18, 2020·Nano-micro Letters·Yanping LiuZongwen Liu
Jul 21, 2021·Nature Nanotechnology·Juan F SierraSergio O Valenzuela
Aug 7, 2021·Physical Review Letters·Josep Ingla-AynésFèlix Casanova
Sep 13, 2019·Nano Letters·Guibin SongRichard A Kiehl
Nov 3, 2021·Nature Communications·Guangyi ChenJian-Hao Chen

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Methods Mentioned

BETA
X-ray
circular dichroism
two hybrid

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