Radio-frequency dispersive detection of donor atoms in a field-effect transistor
Radio-frequency dispersive detection of donor atoms in a field-effect transistor
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DOI：
10.1063/1.4868423
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发表时间：
2013-12
影响因子：
4
通讯作者：
J. Verduijn;M. Vinet;S. Rogge
中科院分区：
文献类型：
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作者：
J. Verduijn;M. Vinet;S. Rogge
射频色散读出可以为纳米尺度结构（诸如纳米线器件）提供有用的探针，特别是当电荷感测的实现不直接时。在这里，我们展示了分散的“栅极”读出的磷捐助者在硅纳米级晶体管。该技术使得能够访问仅隧道耦合到一个接触的状态，这是不容易通过其他方法实现的。这使我们能够在设备通道中定位随机放置的单个供体。此外，该设置自然地与对探测的施主状态的高带宽访问兼容，并且可以帮助基于耦合施主的量子位的实现。
Radio-frequency dispersive read-out can provide a useful probe to nano-scale structures, such as nano-wire devices, especially, when the implementation of charge sensing is not straightforward. Here, we demonstrate dispersive “gate-only” read-out of phosphor donors in a silicon nano-scale transistor. The technique enables access to states that are only tunnel-coupled to one contact, which is not easily achievable by other methods. This allows us to locate individual randomly placed donors in the device channel. Furthermore, the setup is naturally compatible with high bandwidth access to the probed donor states and may aid the implementation of a qubit based on coupled donors.