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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Atomic frustration-based twistronics

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Author(s):
Mizobata, W. N. [1] ; Sanches, J. E. [1] ; Penha, M. [1] ; Silva, W. C. [1] ; Carvalho, C. A. [1] ; Figueira, M. S. ; de Souza, M. [2, 3] ; Seridonio, A. C. [1, 3]
Total Authors: 8
Affiliation:
[1] Sao Paulo State Univ UNESP, Sch Engn, Dept Phys & Chem, BR-15385000 Ilha Solteira, SP - Brazil
[2] Univ Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ - Brazil
[3] Sao Paulo State Univ Unesp, Dept Phys, IGCE, BR-13506970 Rio Claro, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: 2D MATERIALS; v. 8, n. 4 OCT 2021.
Web of Science Citations: 0
Abstract

We theoretically investigate atomic frustrated states in diatomic molecules hosted by the bilayer graphene setup twisted by the first magic angle and with broken inversion symmetry in the Dirac cones of the system mini Brillouin zones. Such states show local spectral features typically from uncoupled atoms, but counterintuitively, they also exhibit nonlocal molecular correlations, which turn them into atomically frustrated. By considering a particle-hole symmetric molecule in the Moire superlattice length-scale, we reveal distinctly from the metallic Weyl counterparts, a molecular zero mode atomically frustrated at the spectral densities of the dimer's atoms. To this end, a strong metallic phase with a plateau in the density of states established by the broken inversion symmetry, together with pronounced blue and red shifts in the molecular levels, due to the magic angle condition, should occur synergistically with atomic Coulomb correlations. Consequently, an entire collapse of these molecular peaks into a single one atomically frustrated, taking place exactly at the Fermi energy, becomes feasible just by tuning properly opposite gate voltages attached to the graphene monolayers. Therefore, we propose that unusual molecular bindings can be engineered via the twistronics of the bilayer graphene system, in particular, if its metallic phase is fully established. (AU)

FAPESP's process: 18/09413-0 - Proposal of a Quantum Phase Transition in 3D Dirac-Weyl topological semimetals: qubit storage on the grounds of bound states in the continuum
Grantee:Antonio Carlos Ferreira Seridonio
Support type: Regular Research Grants