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Giant Nonlocality Near the Dirac Point in Graphene

dynamoliu 添加于 2011-4-19 12:44 | 1330 次阅读 | 0 个评论

作者
Abanin DA, Morozov SV, Ponomarenko LA, Gorbachev RV, Mayorov AS, Katsnelson MI, Watanabe K, Taniguchi T, Novoselov KS, Levitov LS, Geim AK
摘要
Transport measurements have been a powerful tool for discovering electronic phenomena in graphene. We report nonlocal measurements performed in the Hall bar geometry with voltage probes far away from the classical path of charge flow. We observed a large nonlocal response near the Dirac point in fields as low as 0.1 tesla, which persisted up to room temperature. The nonlocality is consistent with the long-range flavor currents induced by the lifting of spin/valley degeneracy. The effect is expected to contribute strongly to all magnetotransport phenomena near the neutrality point.
详细资料
- 文献种类:期刊
- 期刊名称: Science
- 期刊缩写: Science
- 期卷页: 2011年第332卷第6027期 328-330页
- ISBN: 0036-8075
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