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Title: A modular ultra-high vacuum millikelvin scanning tunneling microscope

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.5132872· OSTI ID:1780894

We describe the design, construction, and performance of an ultra-high vacuum (UHV) scanning tunneling microscope (STM) capable of imaging at dilution-refrigerator temperatures and equipped with a vector magnet. The primary objective of our design is to achieve a high level of modularity by partitioning the STM system into a set of easily separable, interchangeable components. This naturally segregates the UHV needs of STM instrumentation from the typically non-UHV construction of a dilution refrigerator, facilitating the usage of non-UHV materials while maintaining a fully bakeable UHV chamber that houses the STM. The modular design also permits speedy removal of the microscope head from the rest of the system, allowing for repairs, modifications, and even replacement of the entire microscope head to be made at any time without warming the cryostat or compromising the vacuum. Without using cryogenic filters, we measured an electron temperature of 184 mK on a superconducting Al(100) single crystal.

Research Organization:
Princeton Univ., NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation; ONR; Princeton Center for Complex Materials
Grant/Contract Number:
FG02-07ER46419; NSF-DMR-1608848; NSF-DMR-1904442; N00014-17-1-2784; DMR-1420541
OSTI ID:
1780894
Alternate ID(s):
OSTI ID: 1597539
Journal Information:
Review of Scientific Instruments, Vol. 91, Issue 2; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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