Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session H12: Computational Materials Design - Carbon-Related Materials
2:30 PM–5:30 PM,
Tuesday, March 6, 2018
LACC Room: 303B
Sponsoring Units: DMP DCOMP
Chair: Joel Varley, Lawrence Livermore National Laboratory
Abstract: H12.00004 : Inhomogeneous Strain-induced Spin-splitting in Bent Zigzag Graphene Nanoribbons
3:06 PM–3:42 PM
(Beijing Computational Science Research Center)
Atomic Realization of half-metallicity in low dimensional materials is a fundamental challenge for nano spintronics, which is a critical component for next-generation information technology. Using the method of generalized Bloch theorem, we show that an in-plane bending can induce inhomogeneous strains, which in turn lead to spin-splitting in zigzag graphene nanoribbons and results in the highly desired half-metallic state. Unlike the previously proposed scheme that requires unrealistic strong external electric fields, the obtained half-metallicity with sizeable half-metallic gap and high energetic stability of magnetic order of edge states requires only relatively low-level strain in the in-plane bending. Given the superior structural flexibility of graphene and the recent experimental advances in controllable synthesis of graphene nanoribbons, our design provides a hitherto more practical approach to the realization of half-metallicity in low dimensional systems.
D. B. Zhang and S.-H. Wei, npj Computational Materials 3, 32 (2017).
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700