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Title: Scanning Quantum Cryogenic Atom Microscope

Abstract

Microscopic imaging of local magnetic fields provides a window into the organizing principles of complex and technologically relevant condensed-matter materials. However, a wide variety of intriguing strongly correlated and topologically nontrivial materials exhibit poorly understood phenomena outside the detection capability of state-of-the-art high-sensitivity high-resolution scanning probe magnetometers. We introduce a quantum-noise-limited scanning probe magnetometer that can operate from room-to-cryogenic temperatures with unprecedented dc-field sensitivity and micron-scale resolution. The Scanning Quantum Cryogenic Atom Microscope (SQCRAMscope) employs a magnetically levitated atomic Bose-Einstein condensate (BEC), thereby providing immunity to conductive and blackbody radiative heating. The SQCRAMscope has a field sensitivity of 1.4 nT per resolution-limited point (approximately 2 μm) or 6 nT/√Hz per point at its duty cycle. Furthermore, compared to point-by-point sensors, the long length of the BEC provides a naturally parallel measurement, allowing one to measure nearly 100 points with an effective field sensitivity of 600 pT/√Hz for each point during the same time as a point-by-point scanner measures these points sequentially. Moreover, it has a noise floor of 300 pT and provides nearly 2 orders of magnitude improvement in magnetic flux sensitivity (down to 10-6 Φ0/√Hz) over previous atomic probe magnetometers capable of scanning near samples. These capabilities are carefullymore » benchmarked by imaging magnetic fields arising from microfabricated wire patterns in a system where samples may be scanned, cryogenically cooled, and easily exchanged. We anticipate the SQCRAMscope will provide charge-transport images at temperatures from room temperature to 4 K in unconventional superconductors and topologically nontrivial materials.« less

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Stanford Univ., CA (United States). Ginzton Lab.
Publication Date:
Research Org.:
Stanford Univ., CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation
OSTI Identifier:
1535760
Alternate Identifier(s):
OSTI ID: 1349953
Grant/Contract Number:  
SC0012338; GBMF3502
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Applied
Additional Journal Information:
Journal Volume: 7; Journal Issue: 3; Journal ID: ISSN 2331-7019
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; atom & ion trapping & guiding; atom optics; Bose-Einstein condensates; quantum metrology; imaging; magnetic techniques; scanning probe microscopy; transport techniques

Citation Formats

Yang, Fan, Kollár, Alicia J., Taylor, Stephen F., Turner, Richard W., and Lev, Benjamin L. Scanning Quantum Cryogenic Atom Microscope. United States: N. p., 2017. Web. doi:10.1103/physrevapplied.7.034026.
Yang, Fan, Kollár, Alicia J., Taylor, Stephen F., Turner, Richard W., & Lev, Benjamin L. Scanning Quantum Cryogenic Atom Microscope. United States. https://doi.org/10.1103/physrevapplied.7.034026
Yang, Fan, Kollár, Alicia J., Taylor, Stephen F., Turner, Richard W., and Lev, Benjamin L. Mon . "Scanning Quantum Cryogenic Atom Microscope". United States. https://doi.org/10.1103/physrevapplied.7.034026. https://www.osti.gov/servlets/purl/1535760.
@article{osti_1535760,
title = {Scanning Quantum Cryogenic Atom Microscope},
author = {Yang, Fan and Kollár, Alicia J. and Taylor, Stephen F. and Turner, Richard W. and Lev, Benjamin L.},
abstractNote = {Microscopic imaging of local magnetic fields provides a window into the organizing principles of complex and technologically relevant condensed-matter materials. However, a wide variety of intriguing strongly correlated and topologically nontrivial materials exhibit poorly understood phenomena outside the detection capability of state-of-the-art high-sensitivity high-resolution scanning probe magnetometers. We introduce a quantum-noise-limited scanning probe magnetometer that can operate from room-to-cryogenic temperatures with unprecedented dc-field sensitivity and micron-scale resolution. The Scanning Quantum Cryogenic Atom Microscope (SQCRAMscope) employs a magnetically levitated atomic Bose-Einstein condensate (BEC), thereby providing immunity to conductive and blackbody radiative heating. The SQCRAMscope has a field sensitivity of 1.4 nT per resolution-limited point (approximately 2 μm) or 6 nT/√Hz per point at its duty cycle. Furthermore, compared to point-by-point sensors, the long length of the BEC provides a naturally parallel measurement, allowing one to measure nearly 100 points with an effective field sensitivity of 600 pT/√Hz for each point during the same time as a point-by-point scanner measures these points sequentially. Moreover, it has a noise floor of 300 pT and provides nearly 2 orders of magnitude improvement in magnetic flux sensitivity (down to 10-6 Φ0/√Hz) over previous atomic probe magnetometers capable of scanning near samples. These capabilities are carefully benchmarked by imaging magnetic fields arising from microfabricated wire patterns in a system where samples may be scanned, cryogenically cooled, and easily exchanged. We anticipate the SQCRAMscope will provide charge-transport images at temperatures from room temperature to 4 K in unconventional superconductors and topologically nontrivial materials.},
doi = {10.1103/physrevapplied.7.034026},
journal = {Physical Review Applied},
number = 3,
volume = 7,
place = {United States},
year = {Mon Mar 27 00:00:00 EDT 2017},
month = {Mon Mar 27 00:00:00 EDT 2017}
}

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Cited by: 19 works
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