A scanning quantum cryogenic atom microscope at 6 kelvin

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The Scanning Quantum Cryogenic Atom Microscope (SQCRAMscope) is a quantum sensor capable of imaging electromagnetic fields emitted from a nearby sample. Here we streamline and improve the capabilities of the SQCRAMscope for studying quantum materials. We upgrade the cryogenics system by replacing the liquid cryostat with a closed-cycle system and adding a radiation shield. The minimum accessible sample temperature is thereby reduced to 5.7~K while maintaining suitably low sample vibrations. Sample loading and cold atom preparation are both additionally simplified. An improved sample mount allows more reliable and rapid exchange of samples, while simplified atom trapping requires less instrumentation without loss of trapping efficiency. One major application of the SQCRAMscope is imaging electric currents by measuring local variations in magnetic field. We discuss the theoretical grounding of this technique, as well as experimental preparation of samples for measurement. Data from iron-pnictide superconductors is used to demonstrate the technique.


Type of resource text
Form electronic resource; remote; computer; online resource
Extent 1 online resource.
Place California
Place [Stanford, California]
Publisher [Stanford University]
Copyright date 2021; ©2021
Publication date 2021; 2021
Issuance monographic
Language English


Author Taylor, Stephen Franklin
Degree supervisor Lev, Benjamin
Thesis advisor Lev, Benjamin
Thesis advisor Kivelson, Steven
Thesis advisor Suzuki, Yuri, (Applied physicist)
Degree committee member Kivelson, Steven
Degree committee member Suzuki, Yuri, (Applied physicist)
Associated with Stanford University, Department of Applied Physics


Genre Theses
Genre Text

Bibliographic information

Statement of responsibility Stephen Franklin Taylor.
Note Submitted to the Department of Applied Physics.
Thesis Thesis Ph.D. Stanford University 2021.
Location https://purl.stanford.edu/yj908vp2171

Access conditions

© 2021 by Stephen Franklin Taylor
This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).

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