Acousto-electric measurements at 2.5 GHz on graphene transferred onto YX128°-LiNbO3

被引：1
作者：
Costanza, Mario [1 ]
La Spina, Lea [1 ]
Moreira, Arthur De Sousa Lopes [1 ]
Belharet, Djaffar [1 ]
Bartasyte, Ausrine [1 ,2 ]
Margueron, Samuel [1 ]
机构：
[1] Univ Franche Comte, CNRS UMR6174, FEMTO ST Inst, ENSMM, F-25030 Besancon, France
[2] Inst Univ France IUF, Paris, France
来源：
NANOTECHNOLOGY | 2023年 / 34卷 / 32期
关键词：
graphene; acousto-electronics; radio frequency; phononic; lithium niobate; TRANSMISSION-LINE MODEL; SURFACE ACOUSTIC-WAVES; CONTACT RESISTANCE;
D O I：
10.1088/1361-6528/acd063
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Surface acoustic wave delay lines with an operational frequency of 2.5 GHz have been designed to measure the acousto-electric transport of carriers in graphene transferred onto YX128 degrees-LiNbO3 piezoelectric substrate. The monolayer of graphene on LiNbO3 presented sheet resistance in the range of 733-1230 omega/ and ohmic contact resistance with gold of 1880 to 5200 omega mu m. The measurements with different interaction lengths on graphene bars have allowed the extraction of carrier absorption and mobility parameters from acousto-electric current. Graphene presented higher acousto-electronic interaction in the GHz range than previously reported values in the range of 100s MHz with carrier absorption losses of 109 m(-1) and mobility for acoustically generated charges of 101 cm(2)V(-1)s(-1).
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页数：8
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