Observation of excited states in a graphene double quantum dot
Observation of excited states in a graphene double quantum dot
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DOI：
10.1209/0295-5075/89/67005
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发表时间：
2010-01
期刊：
影响因子：
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通讯作者：
F. Molitor;Helena S. Knowles;S. Dröscher;U. Gasser;T. Choi;P. Roulleau;J. Güttinger;A. Jacobsen;C. Stampfer;K. Ensslin;T. Ihn
中科院分区：
文献类型：
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作者：
F. Molitor;Helena S. Knowles;S. Dröscher;U. Gasser;T. Choi;P. Roulleau;J. Güttinger;A. Jacobsen;C. Stampfer;K. Ensslin;T. Ihn
我们研究了石墨烯双量子点在不同的耦合制度。尽管点之间的强电容耦合，隧道耦合低于实验分辨率。我们观察到的有限偏置三角形内的其他结构，其中一部分可以归因于电子激发点状态，而其他可能是由于调制的传输的隧道势垒连接系统的源极和漏极引线。
We study a graphene double quantum dot in different coupling regimes. Despite the strong capacitive coupling between the dots, the tunnel coupling is below the experimental resolution. We observe additional structures inside the finite-bias triangles, part of which can be attributed to electronic excited dot states, while others are probably due to modulations of the transmission of the tunnel barriers connecting the system to source and drain leads.