A two-atom electron pump.
A two-atom electron pump.
复制标题
DOI：
10.1038/ncomms2544
复制
发表时间：
2013
影响因子：
16.6
通讯作者：
中科院分区：
文献类型：
--
作者：
随着单原子晶体管的发展，由单一掺杂剂组成，纳米纤维已经达到了极端的小型化水平。未来纳米电子器件的有前途的功能是基于将这些掺杂剂中的几种彼此耦合的可能性。这已经允许通过直流电输运进行施主态的光谱学。下一步，即在两种掺杂剂上操纵单个电子，仍然是一个挑战。在这里，我们演示了电子泵通过两个磷捐助者在串联注入硅纳米线。虽然量子化泵浦是在低频绝热制度，我们观察到显着的功能在较高的频率时，电荷转移是有限的隧道速率的电极或两个捐助者之间。量子态之间的过渡建模涉及朗道-齐纳过渡，允许详细再现在非绝热制度中观察到的特征签名。 通过电子通过单个掺杂剂原子来工作的晶体管实现了电子器件小型化的极限，但只有当多个晶体管紧密连接时，它们才能发挥作用。Roche等人展示了与此等效的方法，将两个这样的晶体管连接起来，构建一个双原子电子泵。
With the development of single-atom transistors, consisting of single dopants, nanofabrication has reached an extreme level of miniaturization. Promising functionalities for future nanoelectronic devices are based on the possibility of coupling several of these dopants to each other. This already allowed to perform spectroscopy of the donor state by d.c. electrical transport. The next step, namely manipulating a single electron over two dopants, remains a challenge. Here we demonstrate electron pumping through two phosphorus donors in series implanted in a silicon nanowire. While quantized pumping is achieved in the low-frequency adiabatic regime, we observe remarkable features at higher frequency when the charge transfer is limited either by the tunnelling rates to the electrodes or between the two donors. The transitions between quantum states are modelled involving a Landau–Zener transition, allowing to reproduce in detail the characteristic signatures observed in the non-adiabatic regime. Transistors that operate by the passage of electrons through a single-dopant atom achieve the ultimate limit for the miniaturization of electronic devices, but only when multiple transistors are intimately connected can they become useful. Roche et al. demonstrate the equivalent of just this, connecting two such transistors to build a two-atom electron pump.
登录
查看更多内容
影响因子：
3.7
作者：
Kaestner, B.;Kashcheyevs, V.;Schumacher, H. W.
通讯作者：
Schumacher, H. W.
影响因子：
8.6
作者：
Kashcheyevs, Vyacheslavs;Kaestner, Bernd
通讯作者：
Kaestner, Bernd
影响因子：
4
作者：
Keller, MW;Martinis, JM;Steinbach, AH
通讯作者：
Steinbach, AH
影响因子：
3.7
作者：
Riwar, Roman-Pascal;Splettstoesser, Janine
通讯作者：
Splettstoesser, Janine
影响因子：
10.8
作者：
Tan, Kuan Yen;Chan, Kok Wai;Dzurak, Andrew S.
通讯作者：
Dzurak, Andrew S.