Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session A40: Graphene Properties
8:00 AM–11:00 AM,
Monday, March 5, 2018
LACC Room: 501C
Sponsoring Unit: DCMP
Chair: Qiong Ma, Massachusetts Institute of Technology-MIT
Abstract: A40.00009 : Field-effect-driven half-metallic multilayer graphene*
9:36 AM–9:48 AM
(Dipartimento di Fisica, Università Roma la Sapienza)
The realization of modern spintronic devices requires injection of spin-polarized currents. Materials of choice for such devices are half-metals, namely compounds conducting in one spin channel and insulating in the other, like Heussler alloys and some transition metal oxides. Here, by using first-principles calculations, we show that field-effect doping of graphene multilayers with rhombohedral stacking induces a perfect half-metallic behaviour with 100% of spin current polarization already at dopings attainable in conventional field effect transistors with solid state dielectrics. Our work defines a new kind of spintronic devices where the spin state is selected and driven by electric fields.
*We acknowledge support from the European Union Horizon 2020 research and innovation programme under Grant agreement No. 696656-GrapheneCore1. Computer facilities were provided by CINES, IDRIS, and CEA TGCC (Grant EDARI No. 2017091202).
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