Unknown

Dataset Information

0

High spin-Chern insulators with magnetic order.


ABSTRACT: As a topological insulator, the quantum Hall (QH) effect is indexed by the Chern and spin-Chern numbers C and Cspin. We have only Cspin = 0 or ± 1/2 in conventional QH systems. We investigate QH effects in generic monolayer honeycomb systems. We search for spin-resolved characteristic patterns by exploring Hofstadter's butterfly diagrams in the lattice theory and fan diagrams in the low-energy Dirac theory. It is shown that the spin-Chern number can takes an arbitrary high value for certain QH systems. This is a new type of topological insulators, which we may call high spin-Chern insulators. Samples may be provided by graphene on the SiC substrate with ferromagnetic order, transition-metal dichalcogenides with ferromagnetic order, transition-metal oxide with antiferromagnetic order and silicene with ferromagnetic order. Actually high spin-Chern insulators are ubiquitous in any systems with magnetic order. Nevertheless, the honeycomb system would provide us with unique materials for practical materialization.

SUBMITTER: Ezawa M 

PROVIDER: S-EPMC3857861 | biostudies-other | 2013

REPOSITORIES: biostudies-other

Similar Datasets

| S-EPMC6744472 | biostudies-literature
| S-EPMC8683445 | biostudies-literature
| S-EPMC10480218 | biostudies-literature
| S-EPMC8674130 | biostudies-literature
| S-EPMC9938148 | biostudies-literature
| S-EPMC10520633 | biostudies-literature
| S-EPMC5768179 | biostudies-literature
| S-EPMC5983919 | biostudies-literature
| S-EPMC7320166 | biostudies-literature
| S-EPMC6197248 | biostudies-literature