Optical fabrication and trapping of superconducting nanoparticles in superfluid helium
Optical fabrication and trapping of superconducting nanoparticles in superfluid helium
复制标题
超流氦中超导纳米粒子的光学制造和捕获
DOI：
10.1117/12.2273278
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Moriwaki Yoshiki
中科院分区：
文献类型：
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作者：
Ashida Masaaki、Minowa Yosuke、Kumakura Mitsutaka;Takahashi Yuta;Matsushima Fusakazu;Moriwaki Yoshiki
超流氦具有极低的温度、可忽略不计的小粘度和巨大的导热系数，为我们提供了一个独特的机会来产生一个新的低温空间，用于制备纳米结构和操纵它们的运动。在这里，我们利用超流氦中的激光烧蚀制备了金属纳米和微米粒子，并利用迈斯纳效应产生的完美抗磁性选择性地捕获了四极磁场中的超导粒子。通过改变液氦的温度，讨论了俘获金属粒子的超导转变温度与尺寸的关系。
Superfluid helium having extremely low temperature, negligibly small viscosity, and huge thermal conductivity provides us a unique opportunity to generate a novel cryogenic space for the fabrication of nanostructures and the manipulation of their motion. Here we fabricated metallic nano- and micro-particles by laser ablation in superfluid helium and selectively trapped superconducting particles with a quadrupole magnetic field utilizing perfect diamagnetism caused by Meissner effect. We also discuss the size dependence of the superconducting transition temperatures of the trapped metallic particles by changing the temperature of liquid helium.