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arXiv 1303.2995cond-mat.mes-hall
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周期势驱动下石墨烯双势垒中的电子隧穿

Electron tunneling through graphene-based double barriers driven by a periodic potential

H. P. Ojeda-Collado, C. Rodríguez-Castellanos

摘要:

研究了时间周期场作用下石墨烯中双势垒结构的光子辅助电荷输运。在Floquet形式主义的框架内,并使用传输矩阵法,计算了中心带和边带的传输概率。发现势垒处的谐波势之间存在一个临界相位差,该相位差可以抵消由于量子干涉引起的非弹性边带的透射,这一现象有助于设计石墨烯基滤波器和高频辐射探测器。讨论了谐振场对共振隧穿的抑制作用。

英文摘要:

Photon-assisted charge transport through a double barrier structure under a time periodic field in graphene is studied. Within the framework of the Floquet formalism and using the transfer matrix method, the transmission probabilities for the central band and sidebands are calculated. A critical phase difference between the harmonic potentials at the barriers, which cancels transmission through the inelastic sidebands due to quantum interference is found. This phenomenon could be of help to design graphene based filters and high-frequency radiation detectors. Quenching of resonant tunneling by the harmonic field applied to the barriers or the well is also discussed.

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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