Nano-systems on the Surface of Liquid Helium

液氦表面的纳米系统

基本信息

批准号：
14002010
负责人：
KONO Kimitoshi
金额：
$ 162.24万
依托单位：
RIKEN (The Institute of Physical and Chemical Reseach)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Specially Promoted Research
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14002010/
关键词：
Surface state electrons on He Qubit Ion pool under He suraface superfluidity Helium-3 surface science ナノ構造

项目摘要

We studied the surface related phenomena of liquid helium by using surface state electrons as a probe and the manipulation of single electrons on a liquid helium surface. A nuclear demagnetization cryostat is constructed, which can produce temperatures as low as 40μK and the transport properties of the Wigner solid is measured on both ^3He-A and ^3He-B. The quality of our data is good enough to discuss the detailed textural structure of superfluid He-3. In addition, the rotating cryostat is constructed and on which the transport properties of 2D electrons on liquid helium is measured. The stability of rotation is improved drastically compared to our previous apparatus. Absorption of millimeter wave of 130 GHz because of the transition between the surface sub-bands is observed successfully down to 15 mK The knowledge is a basis of the quantum manipulation of single electrons on liquid helium. Millimeter-wave-assisted escape phenomena is the next target to study. We prepared a number of nano-gapped electrodes system to study the transport of surface state electrons on a helium film. This is a fundamental key technology to realize single electron manipulation. We observed, however, that the most of electrons on a helium film adsorbed on a metal surface are localized and do not contribute to the conduction. In the next step a capillary condensed helium channel should be used as a substrate. We are going to realize the single electron manipulation in the future.

我们通过将表面状态电子设备作为探针和液态氦表面上的单个电子设备操纵研究了液态氦的表面相关现象。构建了一个核去磁性低温恒温器，可以产生低至40μk的温度，并且在 ^3he-a和 ^3he-b上测量了Wigner固体的运输特性。我们数据的质量足以讨论超流体HE-3的详细质地结构。此外，构建了旋转低温恒温器，并测量了2D电子在液体氦气上的传输性能。与我们以前的设备相比，旋转的稳定性大大提高。由于表面次带之间的过渡而成功地降至15 mk，因此吸收130 GHz的毫米波的吸收是知识是液体氦上单电子量子操作的基础。毫米波辅助的逃生现象是下一个要研究的目标。我们准备了许多纳米胶电子系统，以研究氦膜上表面状态电子的传输。这是实现单电子操作的基本密钥技术。但是，我们观察到，在金属表面上吸附的氦膜上的大部分电子都是局部的，并且不促进传导。在下一步中，应将毛细管冷凝的氦通道用作底物。我们将来会意识到单一的电子操作。