Observation of Landau-level-like quantization at 77 K along a strained-induced graphene ridge

Hui Yan; Yi Sun; Lin He; Jia Cai Nie; Moses H.W. Chan

doi:10.1103/PhysRevB.85.035422

Observation of Landau-level-like quantization at 77 K along a strained-induced graphene ridge

Hui Yan, Yi Sun, Lin He, Jia Cai Nie, Moses H.W. Chan

Research output: Contribution to journal › Article › peer-review

61 Scopus citations

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.

Original language	English (US)
Article number	035422
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	85
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevB.85.035422
State	Published - Jan 17 2012

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1103/PhysRevB.85.035422

Cite this

@article{aca4d7b0427a4448b1e973bed2edb3ce,

title = "Observation of Landau-level-like quantization at 77 K along a strained-induced graphene ridge",

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.",

author = "Hui Yan and Yi Sun and Lin He and Nie, {Jia Cai} and Chan, {Moses H.W.}",

year = "2012",

month = jan,

day = "17",

doi = "10.1103/PhysRevB.85.035422",

language = "English (US)",

volume = "85",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "3",

}

TY - JOUR

T1 - Observation of Landau-level-like quantization at 77 K along a strained-induced graphene ridge

AU - Yan, Hui

AU - Sun, Yi

AU - He, Lin

AU - Nie, Jia Cai

AU - Chan, Moses H.W.

PY - 2012/1/17

Y1 - 2012/1/17

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84863011447&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863011447&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.85.035422

DO - 10.1103/PhysRevB.85.035422

M3 - Article

AN - SCOPUS:84863011447

SN - 1098-0121

VL - 85

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 3

M1 - 035422

ER -

Observation of Landau-level-like quantization at 77 K along a strained-induced graphene ridge

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this