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 |
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Article number | 041910 |
Journal | Applied Physics Letters |
Volume | 100 |
Issue number | 4 |
DOIs | |
State | Published - 23 Jan 2012 |