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Observation of Landau-level-like quantization at 77 K along a strained-induced graphene ridge
- Source :
- Physical Review B. 85
- Publication Year :
- 2012
- Publisher :
- American Physical Society (APS), 2012.
-
Abstract
- 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.
- Subjects :
- Condensed Matter - Materials Science
Local density of states
Materials science
Condensed Matter - Mesoscale and Nanoscale Physics
Strongly Correlated Electrons (cond-mat.str-el)
Condensed matter physics
Graphene
Scanning tunneling spectroscopy
Materials Science (cond-mat.mtrl-sci)
FOS: Physical sciences
Landau quantization
Fermion
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Magnetic field
law.invention
Condensed Matter - Strongly Correlated Electrons
Quantization (physics)
Highly oriented pyrolytic graphite
law
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Subjects
Details
- ISSN :
- 1550235X and 10980121
- Volume :
- 85
- Database :
- OpenAIRE
- Journal :
- Physical Review B
- Accession number :
- edsair.doi.dedup.....10e363f18f8b644bfc9d40544bae92c6