Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 26, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.266801
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Funding
- DOE [DE-FG02-05ER46237]
- National Science Foundation [DMR-1055522]
- Alfred P. Sloan Foundation
- NSERC
- CIfAR
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1055522] Funding Source: National Science Foundation
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Two- dimensional topological insulators (2D TIs) have been proposed as platforms for many intriguing applications, ranging from spintronics to topological quantum information processing. Realizing this potential will likely be facilitated by the discovery of new, easily manufactured materials in this class. With this goal in mind, we introduce a new framework for engineering a 2D TI by hybridizing graphene with impurity bands arising from heavy adatoms possessing partially filled d shells, in particular, osmium and iridium. First-principles calculations predict that the gaps generated by this means exceed 0.2 eV over a broad range of adatom coverage; moreover, tuning of the Fermi level is not required to enter the TI state. The mechanism at work is expected to be rather general and may open the door to designing new TI phases in many materials. DOI: 10.1103/PhysRevLett.109.266801
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