论文标题
一个实验性设置，可在室温下通过单个原子/分子连接探测量子传输
An experimental set up to probe the quantum transport through single atomic/molecular junction at room temperature
论文作者
论文摘要
了解原子限制的运输特征是未来派纳米电子应用的先决条件。在各种实验程序中，机械可控的断裂连接（MCBJ）是研究和控制原子或分子尺度设备的良好采用的实验技术之一。在这里，我们介绍了在环境条件下工作的压电控制表TOP MCBJ设置的开发的详细信息，以及必要的数据采集技术和数据分析。我们在宏观金线上进行了电导实验，该金属丝在用压电的电线时表现出量化的电导平台。电导峰值高达$ \ sim 20 g_0 $（$ g_0 = 2e^2/h $，$ e $是电子费用，$ h $是木板的常数），可以在室温下解决。在金电极和电导直方图之间引入了一个众所周知的测试床分子，4^\ prime $ bipyridine，表现出两个独特的电导峰，证实了单个分子连接的形成，与先前的报道一致。这表明我们定制设计的MCBJ设置能够测量在环境条件下单个分子连接的量子传输。
Understanding the transport characteristics at the atomic limit is the prerequisite for futuristic nano-electronic applications. Among various experimental procedures, mechanically controllable break junction (MCBJ) is one of the well adopted experimental technique to study and control the atomic or molecular scale devices. Here, we present the details of the development of a piezo controlled table top MCBJ set up, working at ambient condition, along with necessary data acquisition technique and analysis of the data. We performed conductance experiment on a macroscopic gold wire, which exhibits quantized conductance plateau upon pulling the wire with the piezo. Conductance peak up to $\sim 20 G_0$ ($G_0 = 2e^2/h$, $e$ being the electronic charge and $h$ being the plank's constant) could be resolved at room temperature. A well-known test bed molecule,$4, 4^\prime$ bipyridine, was introduced between the gold electrodes and conductance histogram exhibits two distinctive conductance peaks, confirming the formation of single molecular junction, in line with the previous reports. This demonstrate that our custom-designed MCBJ set up is capable of measuring quantum transport of a single molecular junction at ambient condition.
