Effect of uni-axial strain on THz/far-infrared response of graphene

Jooyoun Kim; Chul Lee; Sukang Bae; Sang Jin Kim; Keun Soo Kim; Byung Hee Hong; E. J. Choi

doi:10.1063/1.3680095

Effect of uni-axial strain on THz/far-infrared response of graphene

Jooyoun Kim
, Chul Lee
, Sukang Bae
, Sang Jin Kim
, Keun Soo Kim
, Byung Hee Hong
, E. J. Choi

Department of Physics

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

11 Scopus citations

Abstract

We present polarized optical transmission study of uniaxially strained large scale graphene in THz/far-infrared (IR) frequency region. Graphene was supported on stretchable polyethylene substrate and they were elongated up to 20 (ΔL/L _o = 0.2) by applying tensile force. For the IR light polarized along the strain direction (E _IR//strain), the optical conductivity σ ₁(omega;) of graphene changes from Drude response into strongly non-Drude-like behavior with a peak formed at finite energy ∼10 meV. In contrast, the coherent Drude conductivity is preserved along the direction perpendicular to the strain (E _IR⊥strain). Possible origin of the strain-induced non-Drude σ ₁(omega;)-behavior is discussed.

Original language	English
Article number	041910
Journal	Applied Physics Letters
Volume	100
Issue number	4
DOIs	https://doi.org/10.1063/1.3680095
State	Published - 23 Jan 2012

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abstract = "We present polarized optical transmission study of uniaxially strained large scale graphene in THz/far-infrared (IR) frequency region. Graphene was supported on stretchable polyethylene substrate and they were elongated up to 20 (ΔL/L o = 0.2) by applying tensile force. For the IR light polarized along the strain direction (E IR//strain), the optical conductivity σ 1(omega;) of graphene changes from Drude response into strongly non-Drude-like behavior with a peak formed at finite energy ∼10 meV. In contrast, the coherent Drude conductivity is preserved along the direction perpendicular to the strain (E IR⊥strain). Possible origin of the strain-induced non-Drude σ 1(omega;)-behavior is discussed.",

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AU - Kim, Jooyoun

AU - Lee, Chul

AU - Bae, Sukang

AU - Jin Kim, Sang

AU - Soo Kim, Keun

AU - Hee Hong, Byung

AU - Choi, E. J.

PY - 2012/1/23

Y1 - 2012/1/23

N2 - We present polarized optical transmission study of uniaxially strained large scale graphene in THz/far-infrared (IR) frequency region. Graphene was supported on stretchable polyethylene substrate and they were elongated up to 20 (ΔL/L o = 0.2) by applying tensile force. For the IR light polarized along the strain direction (E IR//strain), the optical conductivity σ 1(omega;) of graphene changes from Drude response into strongly non-Drude-like behavior with a peak formed at finite energy ∼10 meV. In contrast, the coherent Drude conductivity is preserved along the direction perpendicular to the strain (E IR⊥strain). Possible origin of the strain-induced non-Drude σ 1(omega;)-behavior is discussed.

AB - We present polarized optical transmission study of uniaxially strained large scale graphene in THz/far-infrared (IR) frequency region. Graphene was supported on stretchable polyethylene substrate and they were elongated up to 20 (ΔL/L o = 0.2) by applying tensile force. For the IR light polarized along the strain direction (E IR//strain), the optical conductivity σ 1(omega;) of graphene changes from Drude response into strongly non-Drude-like behavior with a peak formed at finite energy ∼10 meV. In contrast, the coherent Drude conductivity is preserved along the direction perpendicular to the strain (E IR⊥strain). Possible origin of the strain-induced non-Drude σ 1(omega;)-behavior is discussed.

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DO - 10.1063/1.3680095

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VL - 100

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 4

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ER -

Effect of uni-axial strain on THz/far-infrared response of graphene

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