Effect of Arrangement of Input Gates on Logic Switching Characteristics of Nanodot Array Device
Effect of Arrangement of Input Gates on Logic Switching Characteristics of Nanodot Array Device
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DOI：
10.1587/transele.e95.c.865
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发表时间：
2012-05-01
影响因子：
0.5
通讯作者：
Choi, Jung-Bum
中科院分区：
文献类型：
--
作者：
Jo, Mingu;Kato, Yuki;Choi, Jung-Bum
我们开发了一种可变逻辑栅单电子器件(SED)，其中可以通过改变施加到控制栅上的电压来选择逻辑功能。它由具有多个输入和多个输出的纳米点阵列组成。由于栅电极电容地耦合到下面的许多点，因此当一些栅电极用作控制栅时，取决于栅极电压的组合的复杂特性产生可选择的逻辑栅。其中一个重要的问题是如何设计纳米点和栅电极的排列方式。在这项研究中，我们制作了一个硅纳米点阵列，它有两个简单的输入门和两个输出端，其中每个门都耦合到纳米点阵列的一半。尽管该器件的输入门布置非常简单，只有一个控制门，但我们可以通过使用电流映射作为输入门电压的函数来创建半加函数。我们发现，均匀耦合到两个输入门的纳米点在获得一组基本的逻辑函数时起着重要的作用。此外，这些结果保证了更复杂的输入栅极结构，其中每个栅极均匀地耦合许多纳米点，将产生更复杂的功能。
We developed a flexible-logic-gate single-electron device (SED) in which logic functions can be selected by changing the voltage applied to the control gate. It consists of an array of nanodots with multiple inputs and multiple outputs. Since the gate electrodes couple capacitively to the many dots underneath, complicated characteristics depending on the combination of the gate voltages yield a selectable logic gate when some of the gate electrodes are used as control gates. One of the important issues is how to design the arrangement of nanodots and gate electrodes. In this study, we fabricated a Si nanodot array with two simple input gates and two output terminals, in which each gate was coupled to half of the nanodot array. Even though the device had a very simple input-gate arrangement and just one control gate, we could create a half-adder function through the use of current maps as functions of the input gate voltages. We found that the nanodots evenly coupled capacitively to both input gates played an important role in getting a basic set of logic functions. Moreover, these results guarantee that a more complicated input-gate structure, in which each gate evenly couples many nanodots, will yield more complicated functions.