Acoustoelectric photoresponse in graphene

Journal Article · Mon Mar 30 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4916940· OSTI ID:22398832

Poole, T.; Bandhu, L.

The acoustoelectric current in graphene has been investigated as a function of illumination, using blue (450 nm) and red (735 nm) light-emitting diodes (LEDs), and surface acoustic wave (SAW) intensity and frequency. The measured acoustoelectric current increases with illumination, more than the measured change in the conductivity of the graphene, whilst retaining a linear dependence on the SAW intensity. The latter is consistent with the interaction between the carriers and SAWs being described by a relatively simple classical relaxation model suggesting that the change in the acoustoelectric current is caused by the effect of the illumination on the electronic properties of the graphene. The increase in the acoustoelectric current is greatest under illumination with the blue LED, consistent with the creation of a hot electron distribution.

• OSTI ID: 22398832
• Journal Information: Applied Physics Letters, Vol. 106, Issue 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE CARRIERS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRONIC STRUCTURE
ELECTRONS
GRAPHENE
ILLUMINANCE
LIGHT EMITTING DIODES
RELAXATION
SOUND WAVES
SURFACES