TY - JOUR
T1 - A modular ultra-high vacuum millikelvin scanning tunneling microscope
AU - Wong, Dillon
AU - Jeon, Sangjun
AU - Nuckolls, Kevin P.
AU - Oh, Myungchul
AU - Kingsley, Simon C.J.
AU - Yazdani, Ali
N1 - Funding Information:
The authors thank the following for helpful discussions and/or technical assistance: Steve Shedd, Peter Wilson, and Ulrich Marck-mann from Integrated Dynamics Engineering; Nick Dent and John Burgoyne from Oxford Instruments; Steven Lowe and William Dix from the Princeton Department of Physics machine shop; Joseph A. Stroscio from the National Institute of Standards and Technology (NIST); and Nana Shumiya, Berthold Jäck, Hao Ding, Mallika Randeria, Yonglong Xie, and Hiroyuki Inoue from Princeton University. The instrumentation and infrastructure were primarily supported by the Gordon and Betty Moore Foundation, with additional funding under NSF Grant Nos. NSF-DMR-1608848 and NSF-DMR-1904442, DOE-BES Grant No. DE-FG02-07ER46419, ONR Grant No. N00014-17-1-2784, the Eric and Wendy Schmidt Transformative Technology Fund at Princeton, and the NSF-MRSEC program through the Princeton Center for Complex Materials (Grant No. DMR-1420541).
Publisher Copyright:
© 2020 Author(s).
PY - 2020/2/1
Y1 - 2020/2/1
N2 - 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.
AB - 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.
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U2 - 10.1063/1.5132872
DO - 10.1063/1.5132872
M3 - Review article
C2 - 32113373
AN - SCOPUS:85079208662
SN - 0034-6748
VL - 91
JO - Review of Scientific Instruments
JF - Review of Scientific Instruments
IS - 2
M1 - 023703
ER -