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Journal article
Engineering interaction-induced topological insulators in a 3[radical] x 3[radical] substrate-induced honeycomb superlattice
Physical review. B, v 93(4)
15 Jan 2016
Abstract
We consider a system of spinless fermions on the honeycomb lattice with substrate-induced modulated electrostatic potentials tripling the unit cell. The resulting non-Abelian [ScriptI]U(2) gauge fields act cooperatively to realize a quadratic band crossing point (QBCP). Using a combination of mean-field theory and renormalization group techniques, we show that in the QBCP regime, arbitrarily weak repulsive electronic interactions drive the system into the quantum anomalous Hall state. This proves that substrate-induced local voltages are an effective knob to induce the spontaneous formation of a topological quantum phase.
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Details
- Title
- Engineering interaction-induced topological insulators in a 3[radical] x 3[radical] substrate-induced honeycomb superlattice
- Creators
- Jorn VenderbosMarco Manzardo - Leibniz Institute for Solid State and Materials ResearchDmitry Efremov - Leibniz Institute for Solid State and Materials ResearchJeroen van den Brink - Leibniz Institute for Solid State and Materials ResearchCarmine Ortix - Leibniz Institute for Solid State and Materials Research
- Publication Details
- Physical review. B, v 93(4)
- Publisher
- Cold Spring Harbor Press
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000369224100005
- Scopus ID
- 2-s2.0-85000415054
- Other Identifier
- 991021865929404721
InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter