Shubnikov-de Haas Oscillations in Proton-irradiated Graphite

Kyu Won Lee; Jinsoo Kim; Cheol Eui Lee

doi:10.3938/jkps.59.2959

Shubnikov-de Haas Oscillations in Proton-irradiated Graphite

Kyu Won Lee, Jinsoo Kim, Cheol Eui Lee

Department of Physics

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

2 Citations (Scopus)

Abstract

Our study of the Shubnikov-de Haas (SdH) effect in highly-oriented pyrolytic graphite (HOPG) systems shows that low-density electrons may occupy a 3D Fermi surface and high-density holes a 2D surface in proton-irradiated HOPG while both carriers occupy a 2D Fermi surface in virgin HOPG. No massless Dirac fermions were evidenced by the SdH oscillations both in virgin HOPG and in proton-irradiated HOPG. Following the examination of the recent controversy on massless Dirac fermions in HOPG, we find that even a small amount of acceptor-like defects may play an important role in the interpretation of SdH oscillations.

Original language	English
Pages (from-to)	L2959-L2962
Journal	Journal of the Korean Physical Society
Volume	59
Issue number	5
DOIs	https://doi.org/10.3938/jkps.59.2959
Publication status	Published - 2011

Keywords

Proton-irradiation in graphite
Shubnikov-de Haas oscillations
Spatial separation of charge carriers

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.3938/jkps.59.2959

Cite this

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title = "Shubnikov-de Haas Oscillations in Proton-irradiated Graphite",

abstract = "Our study of the Shubnikov-de Haas (SdH) effect in highly-oriented pyrolytic graphite (HOPG) systems shows that low-density electrons may occupy a 3D Fermi surface and high-density holes a 2D surface in proton-irradiated HOPG while both carriers occupy a 2D Fermi surface in virgin HOPG. No massless Dirac fermions were evidenced by the SdH oscillations both in virgin HOPG and in proton-irradiated HOPG. Following the examination of the recent controversy on massless Dirac fermions in HOPG, we find that even a small amount of acceptor-like defects may play an important role in the interpretation of SdH oscillations.",

keywords = "Proton-irradiation in graphite, Shubnikov-de Haas oscillations, Spatial separation of charge carriers",

author = "Lee, {Kyu Won} and Jinsoo Kim and Lee, {Cheol Eui}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRL Program 2011-0018628, Cyclotron Users Program 2011-0018400, and Project No. 20090082672). The measurements at the Korean Basic Science Institute (KBSI) are gratefully acknowledged. Publisher Copyright: {\textcopyright} 2011, SAGE Publications Inc. All rights reserved.",

year = "2011",

doi = "10.3938/jkps.59.2959",

language = "English",

volume = "59",

pages = "L2959--L2962",

journal = "Journal of the Korean Physical Society",

issn = "0374-4884",

publisher = "Korean Physical Society",

number = "5",

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TY - JOUR

T1 - Shubnikov-de Haas Oscillations in Proton-irradiated Graphite

AU - Lee, Kyu Won

AU - Kim, Jinsoo

AU - Lee, Cheol Eui

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRL Program 2011-0018628, Cyclotron Users Program 2011-0018400, and Project No. 20090082672). The measurements at the Korean Basic Science Institute (KBSI) are gratefully acknowledged. Publisher Copyright: © 2011, SAGE Publications Inc. All rights reserved.

PY - 2011

Y1 - 2011

N2 - Our study of the Shubnikov-de Haas (SdH) effect in highly-oriented pyrolytic graphite (HOPG) systems shows that low-density electrons may occupy a 3D Fermi surface and high-density holes a 2D surface in proton-irradiated HOPG while both carriers occupy a 2D Fermi surface in virgin HOPG. No massless Dirac fermions were evidenced by the SdH oscillations both in virgin HOPG and in proton-irradiated HOPG. Following the examination of the recent controversy on massless Dirac fermions in HOPG, we find that even a small amount of acceptor-like defects may play an important role in the interpretation of SdH oscillations.

AB - Our study of the Shubnikov-de Haas (SdH) effect in highly-oriented pyrolytic graphite (HOPG) systems shows that low-density electrons may occupy a 3D Fermi surface and high-density holes a 2D surface in proton-irradiated HOPG while both carriers occupy a 2D Fermi surface in virgin HOPG. No massless Dirac fermions were evidenced by the SdH oscillations both in virgin HOPG and in proton-irradiated HOPG. Following the examination of the recent controversy on massless Dirac fermions in HOPG, we find that even a small amount of acceptor-like defects may play an important role in the interpretation of SdH oscillations.

KW - Proton-irradiation in graphite

KW - Shubnikov-de Haas oscillations

KW - Spatial separation of charge carriers

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U2 - 10.3938/jkps.59.2959

DO - 10.3938/jkps.59.2959

M3 - Letter

AN - SCOPUS:84982756140

SN - 0374-4884

VL - 59

SP - L2959-L2962

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

IS - 5

ER -

Shubnikov-de Haas Oscillations in Proton-irradiated Graphite

Abstract

Keywords

ASJC Scopus subject areas

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