Weak localization behavior observed in graphene grown on germanium substrate
Two dimensional electron systems (2DES) usually show the weak localization behavior in consequence of electron interaction in the limited dimension. Distinct from other 2DES, the monolayer graphene, due to the chirality, exhibits unique weak localization behavior sensitive to not only inelastic but...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2018-04-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5021875 |
| _version_ | 1811204549109612544 |
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| author | Yinbo Sun Miao Zhang Linxi Dong Gaofeng Wang Xiaoming Xie Xi Wang Tao Hu Zengfeng Di |
| author_facet | Yinbo Sun Miao Zhang Linxi Dong Gaofeng Wang Xiaoming Xie Xi Wang Tao Hu Zengfeng Di |
| author_sort | Yinbo Sun |
| collection | DOAJ |
| description | Two dimensional electron systems (2DES) usually show the weak localization behavior in consequence of electron interaction in the limited dimension. Distinct from other 2DES, the monolayer graphene, due to the chirality, exhibits unique weak localization behavior sensitive to not only inelastic but also elastic carrier scattering. Grain boundaries, which usually exist in monolayer graphene, are apparently related to the elastic carrier scattering process, thus affecting the weak localization behavior. However, their effect is scarcely studied due to the lack of an ideal platform. Here, a complementary system consisting of both single-crystalline graphene grown on Ge (110) and poly-crystalline graphene grown on Ge (111) is constructed. From the comparison of magnetoresistivity measurements, the weak localization effect is found to be greatly enhanced for the poly-crystalline graphene on Ge(111) compared to the single-crystalline graphene on Ge(110). The degraded transport performance in graphene/Ge(111) is due to the presence of grain boundary in poly-crystalline graphene, which results in the enhanced elastic intervalley scattering. In addition, the inelastic scattering originating from the strong electron-electron interaction at low temperature also contributes to weak localization of poly-crystalline graphene/Ge(111). |
| first_indexed | 2024-04-12T03:14:58Z |
| format | Article |
| id | doaj.art-175b67bda3cd4664b9f47b0ab6bbdceb |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-12T03:14:58Z |
| publishDate | 2018-04-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-175b67bda3cd4664b9f47b0ab6bbdceb2022-12-22T03:50:10ZengAIP Publishing LLCAIP Advances2158-32262018-04-0184045214045214-610.1063/1.5021875048804ADVWeak localization behavior observed in graphene grown on germanium substrateYinbo Sun0Miao Zhang1Linxi Dong2Gaofeng Wang3Xiaoming Xie4Xi Wang5Tao Hu6Zengfeng Di7State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaKey Laboratory of RF Circuits and System of Ministry of Education, Electronic and Information College of Hangzhou Dianzi University, Hangzhou 310018, ChinaKey Laboratory of RF Circuits and System of Ministry of Education, Electronic and Information College of Hangzhou Dianzi University, Hangzhou 310018, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, ChinaTwo dimensional electron systems (2DES) usually show the weak localization behavior in consequence of electron interaction in the limited dimension. Distinct from other 2DES, the monolayer graphene, due to the chirality, exhibits unique weak localization behavior sensitive to not only inelastic but also elastic carrier scattering. Grain boundaries, which usually exist in monolayer graphene, are apparently related to the elastic carrier scattering process, thus affecting the weak localization behavior. However, their effect is scarcely studied due to the lack of an ideal platform. Here, a complementary system consisting of both single-crystalline graphene grown on Ge (110) and poly-crystalline graphene grown on Ge (111) is constructed. From the comparison of magnetoresistivity measurements, the weak localization effect is found to be greatly enhanced for the poly-crystalline graphene on Ge(111) compared to the single-crystalline graphene on Ge(110). The degraded transport performance in graphene/Ge(111) is due to the presence of grain boundary in poly-crystalline graphene, which results in the enhanced elastic intervalley scattering. In addition, the inelastic scattering originating from the strong electron-electron interaction at low temperature also contributes to weak localization of poly-crystalline graphene/Ge(111).http://dx.doi.org/10.1063/1.5021875 |
| spellingShingle | Yinbo Sun Miao Zhang Linxi Dong Gaofeng Wang Xiaoming Xie Xi Wang Tao Hu Zengfeng Di Weak localization behavior observed in graphene grown on germanium substrate AIP Advances |
| title | Weak localization behavior observed in graphene grown on germanium substrate |
| title_full | Weak localization behavior observed in graphene grown on germanium substrate |
| title_fullStr | Weak localization behavior observed in graphene grown on germanium substrate |
| title_full_unstemmed | Weak localization behavior observed in graphene grown on germanium substrate |
| title_short | Weak localization behavior observed in graphene grown on germanium substrate |
| title_sort | weak localization behavior observed in graphene grown on germanium substrate |
| url | http://dx.doi.org/10.1063/1.5021875 |
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