Exploring Low Dimensions: Building Novel Superconducting Nanodevices to Discover New Physics

Superconductivity;Nanotechnology;Nanofabrication;Physics

Morgan-Wall, Tyler ThomasMarkovic, Nina ;

Johns Hopkins University

关键词: Superconductivity;    Nanotechnology;    Nanofabrication;    Physics;   

Others  :  https://jscholarship.library.jhu.edu/bitstream/handle/1774.2/39364/MORGAN-WALL-DISSERTATION-2015.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: JOHNS HOPKINS DSpace Repository

【 摘 要 】

This thesis reports on experimental progress in the understanding of superconducting transport properties of low-dimensional nano-structures, focused on lithographically produced aluminum nanowires. The nanowires were studied using transport measurements at temperatures down to 0.25K. A new method is presented on lithographically fabricating one-dimensional nanowires with high control over the final size and size of the wire, enabling the production of wires in a new size regime.Evidence for Weber blockade, a new type of ”vortex quantum dot,” is presented for superconducting nanowires. The evidence for this new effect will enable better understanding and control over future superconducting devices that employ vortex dynamics in their operation. Finally, evidence for the various features of vortex transport in thin, narrow superconducting nanowires is shown.This work was conducted under the supervision of Professor Nina Markovic.