Surface acoustic wave amplification by direct current-voltage supplied to graphene film
- Institute of Microelectronics Technology and High Purity Materials, 6 Academician Ossipyan str., Chernogolovka, Moscow region 142432 (Russian Federation)
- Nazarbayev University Research and Innovation System, 53 Kabanbay Batyr St., Astana 010000 (Kazakhstan)
Using a high-resolution X-Ray diffraction measurement method, the surface acoustic wave (SAW) propagation in a graphene film on the surface of a Ca{sub 3}TaGa{sub 3}Si{sub 2}O{sub 14} (CTGS) piezoelectric crystal was investigated, where an external current was driven across the graphene film. Here, we show that the application of the DC field leads to a significant enhancement of the SAW magnitude and, as a result, to amplification of the diffraction satellites. Amplification of 33.2 dB/cm for the satellite +1, and of 13.8 dB/cm for the satellite +2, at 471 MHz has been observed where the external DC voltage of +10 V was applied. Amplification of SAW occurs above a DC field much smaller than that of a system using bulk semiconductor. Theoretical estimates are in reasonable agreement with our measurements and analysis of experimental data for other materials.
- OSTI ID:
- 22399138
- Journal Information:
- Applied Physics Letters, Vol. 106, Issue 2; 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
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMPLIFICATION
CALCIUM COMPOUNDS
CRYSTALS
DIRECT CURRENT
ELECTRIC CONDUCTIVITY
ELECTRIC POTENTIAL
GALLIUM COMPOUNDS
GRAPHENE
MHZ RANGE
PIEZOELECTRICITY
SEMICONDUCTOR MATERIALS
SOUND WAVES
SURFACES
TANTALUM SILICATES
WAVE PROPAGATION
X-RAY DIFFRACTION