Feeling the noise in nanoscale systems: studies based on ultrasensitive force detection

Daniel Rugar; R. Budakian; B. W. Chui; H. Jonathon Mamin

doi:10.1117/12.501943

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9 May 2003 Feeling the noise in nanoscale systems: studies based on ultrasensitive force detection

Daniel Rugar, R. Budakian, B. W. Chui, H. Jonathon Mamin

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Proceedings Volume 5112, Noise as a Tool for Studying Materials; (2003) https://doi.org/10.1117/12.501943
Event: SPIE's First International Symposium on Fluctuations and Noise, 2003, Santa Fe, New Mexico, United States

Abstract

Recent advances in cantilever-based force detection have allowed detection of forces below an attonewton. We have applied this capability to the study of dissipation and fluctuations in nanometer-scale systems. Our work is largely motivated by our effort to extend magnetic resonance force microscopy (MRFM) to single-spin sensitivity, where we have been confronted with a variety of unanticipated noise issues. Phenomena that we have studied include magnetic moment fluctuations in nanoscale ferromagnets, non-contact friction and force fluctuations near surfaces, and increased electron spin relaxation rates observed when closely monitoring electron spins by MRFM. The enhanced spin relaxation rate is believed to be caused by Rabi frequency magnetic noise that is generated by thermal vibrations in high order cantilever modes. Overcoming these various noise issues will be key to achieving single-spin quantum readout. This work was performed in collaboration with H. J. Mamin, R. Budakian, B. Chui, B. Stipe and C. S. Yannoni. We thank ONR and the DARPA Mosaic program for financial support.

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Daniel Rugar, R. Budakian, B. W. Chui, and H. Jonathon Mamin "Feeling the noise in nanoscale systems: studies based on ultrasensitive force detection", Proc. SPIE 5112, Noise as a Tool for Studying Materials, (9 May 2003); https://doi.org/10.1117/12.501943

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