Nanometer-Scale Nuclear Magnetic Resonance Diffraction with Sub-\AA ngstrom Precision

• URL: http://arxiv.org/abs/2204.00221v1
• Date: Fri, 1 Apr 2022 05:53:52 GMT
• Title: Nanometer-Scale Nuclear Magnetic Resonance Diffraction with Sub-\AA ngstrom Precision
• Authors: Holger Haas, Sahand Tabatabaei, William Rose, Pardis Sahafi, Mich\`ele Piscitelli, Andrew Jordan, Pritam Priyadarsi, Namanish Singh, Ben Yager, Philip J. Poole, Dan Dalacu, Raffi Budakian
• Abstract summary: We present a new approach to nanoMRI utilizing nuclear magnetic resonance diffraction (NMRd) The realization of NMRd on the atomic scale would create a powerful new methodology for materials characterization utilizing the spectroscopic capabilities of NMR.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Achieving atomic resolution is the ultimate limit of magnetic resonance imaging (MRI), and attaining this capability offers enormous technological and scientific opportunities, from drug development to understanding the dynamics in interacting quantum systems. In this work, we present a new approach to nanoMRI utilizing nuclear magnetic resonance diffraction (NMRd) -- a method that extends NMR imaging to probe the structure of periodic spin systems. The realization of NMRd on the atomic scale would create a powerful new methodology for materials characterization utilizing the spectroscopic capabilities of NMR. We describe two experiments that realize NMRd measurement of $^{31}$P spins in an indium-phosphide (InP) nanowire with sub-\r{A}ngstrom precision. In the first experiment, we encode a nanometer-scale spatial modulation of the $z$-axis magnetization by periodically inverting the $^{31}$P spins, and detect the period and position of the modulation with a precision of $<0.8$ \r{A}. In the second experiment, we demonstrate an interferometric technique, utilizing NMRd, for detecting an \r{A}ngstrom-scale displacement of the InP sample with a precision of 0.07 \r{A}. The diffraction-based techniques developed in this work represent new measurement modalities in NMR for probing the structure and dynamics of spins on sub-\r{A}ngstrom length scales, and demonstrate the feasibility of crystallographic MRI measurements.

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