期刊
JOURNAL OF APPLIED PHYSICS
卷 114, 期 21, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4839336
关键词
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资金
- National Key Projects for the Basic Research of China [2013CB922103, 2011CB922103, 2010CB923400, 2009CB930501]
- National Natural Science Foundation of China [11023002, 11134005, 60825402, 61176088, 11075076, 11274003]
- PAPD project
- Natural Science Foundation of Jiangsu Province [BK20130054]
- Fundamental Research Funds for the Central Universities
We report room-temperature observations of the quantum conductance corrections caused by the weak localization in graphene films synthesized using solid-state-source chemical vapor deposition. Both Raman spectroscopy and Hall measurements showed strong disorder in the samples with a low mobility of similar to 430 cm(2)/V s. The emergence of weak localization at room temperature arises from the competition between the valley-dependent scattering and the thermal dephasing in such low-quality samples, although quantum effects normally appear in the samples that have an ideal structure at cryogenic temperatures. The large disorder in our low-mobility samples unexpectedly preserved the quantum mechanical weak localization. (C) 2013 AIP Publishing LLC.
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