Pressure-induced magnetism in rotated graphene bilayers

Felix Yndurain
Phys. Rev. B 99, 045423 – Published 17 January 2019

Abstract

Using ab initio methods based on density functional theory, we show that rotated graphene bilayers at angles different from the magic ones can have an electronic spectrum similar to those by applying moderate external pressures. We find that for an angle of 5.08 and a pressure of 2.19 GPa, the spin-restricted spectrum displays a flat band at the Fermi level similar to the one found at magic angles. In addition, the spin-unrestricted calculations show a correlated ferromagnetic ground state with a total magnetic moment of 3.7μB per unit cell being mostly localized in the AA stacking region of the Moiré pattern. The possibility of antiferromagnetic order is considered but not calculated. Doping the system with either electrons or holes destroys the magnetic moments.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
1 More
  • Received 30 September 2018

DOI:https://doi.org/10.1103/PhysRevB.99.045423

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Felix Yndurain*

  • Departamento de Física de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain

  • *felix.yndurain@uam.es

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 99, Iss. 4 — 15 January 2019

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×