Journal
PHYSICAL REVIEW B
Volume 85, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.035422
Keywords
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Funding
- National Natural Science Foundation of China [10974019, 11004010, 51172029, 91121012]
- Fundamental Research Funds for the Central Universities
- Ministry of Science and Technology of China [2011CB921903]
- State Materials Research Science and Engineering Center (MRSEC) under NSF [DMR-0820404]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [820404] Funding Source: National Science Foundation
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Recent studies show that the electronic structures of graphene can be modified by strain, and it was predicted that strain in graphene can induce peaks in the local density of states (LDOS), mimicking Landau levels (LLs) generated in the presence of a large magnetic field. Here we report the scanning tunneling spectroscopy (STS) observation of nine strain-induced peaks in LDOS at 77 K along a graphene ridge created when the graphene layer was cleaved from a sample of highly oriented pyrolytic graphite (HOPG). The energies of these peaks follow the progression of LLs of massless Dirac fermions (DFs) in a magnetic field of 230 T. The results presented here suggest a possible route to realize zero-field quantum Hall-like effects at 77 K.
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