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arXiv 1001.4690cond-mat.mes-hall
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石墨烯的量子电容和态密度

Quantum capacitance and density of states of graphene

S. Dröscher, P. Roulleau, F. Molitor, P. Studerus, C. Stampfer, T. Ihn, K. Ensslin

摘要:

我们报告的量子电容在石墨烯作为载流子密度的函数的测量。采用了对小电容变化具有高灵敏度的谐振LC电路。态密度与量子电容成正比,在电荷中性点附近显著大于零。这一发现被解释为是一个结果的潜在波动与振幅的顺序为100毫电子伏的良好协议与扫描单电子晶体管测量散装石墨烯和纳米带的运输研究。

英文摘要:

We report on measurements of the quantum capacitance in graphene as a function of charge carrier density. A resonant LC-circuit giving high sensitivity to small capacitance changes is employed. The density of states, which is directly proportional to the quantum capacitance, is found to be significantly larger than zero at and around the charge neutrality point. This finding is interpreted to be a result of potential fluctuations with amplitudes of the order of 100 meV in good agreement with scanning single-electron transistor measurements on bulk graphene and transport studies on nanoribbons.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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