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Physics

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Displaying 601 - 625 of 2573

Intermediate spin pair relaxation through modulation of isotropic hyperfine interaction in frequency-swept spin-dependent recombination in 4H-SiC

February 7, 2022
Author(s)
James Ashton, Brian Manning, Stephen Moxim, Fedor Sharov, Patrick Lenahan, Jason Ryan
Electrically detected magnetic resonance (EDMR) measurements have been extended to sub-mT measurements through utilization of frequency sweeping of the oscillating magnetic field, where conventional electron paramagnetic resonance-based measurements

New analysis of Fe VII

February 5, 2022
Author(s)
Alexander Kramida, A.N. Ryabtsev, Peter R. Young
New spectrograms of multiply ionized iron have been recorded and analyzed, targeting the Fe VII spectrum. As a result, several previously unknown spectral lines and energy levels have been identified in this spectrum. These new data have been analyzed

Operator scaling dimensions and multifractality at measurement-induced transitions

February 3, 2022
Author(s)
Michael Gullans, Zabalo Aidan, Justin Wilson, Romain Vasseur, Andreas Ludwig, Sarang Gopalakrishnan Gopalakrishnan, David Huse, Jed Pixley
Repeated local measurements of quantum many body systems can induce a phase transition in their entanglement structure. These measurement-induced phase transitions (MIPTs) have been studied for various types of dynamics, yet most cases yield quantitatively

Characterizing Frequency Stability Measurements having Multiple Data Gaps

February 2, 2022
Author(s)
David A. Howe, Noah Schlossberger
Time series measurements with data gaps (dead times) prevent accurate computations of frequency variances such as the Allan variance (AVAR) and its square-root ADEV. To extract frequency distributions, data must be sequentially ordered and equally spaced

Detection of individual spin species via frequency-modulated charge pumping

February 2, 2022
Author(s)
James Ashton, Mark Anders, Jason Ryan
We utilize the recently developed frequency-modulated charge pumping technique to detect a single charge per cycle, which strongly suggests a single Si/SiO2 interface trap. This demonstration in sub-micron MOSFETs, in which scaling of the gate oxide yields

Intact, Commercial Lithium-Polymer Batteries: Spatially Resolved Grating-Based Interferometry Imaging, Bragg Edge Imaging, and Neutron Diffraction

January 25, 2022
Author(s)
Adam Brooks, Daniel Hussey, Kyungmin Ham, David Jacobson, Ingo Manke, Nikolay Kardjilov, Leslie G. Butler
We survey several neutron imaging and diffraction methods for non-destructive testing and evaluation of intact, commercial lithium-ion batteries. Specifically, far-field interferometry was explored as an option to probe a wide range of autocorrelation

Advantage of Machine Learning over Maximum Likelihood in Limited-Angle Low-Photon X-Ray Tomography

January 20, 2022
Author(s)
Zhen Guo, Jungki Song, George Barbastathis, Michael Glinsky, Courtenay Vaughan, Kurt Larson, Bradley Alpert, Zachary H. Levine
Limited-angle X-ray tomography reconstruction is an ill-posed inverse problem in general. Especially when the projection angles are limited and the measurements are taken in a photon-limited condition, reconstructions from classical algorithms such as

Noble-metal dark-edge fermiology: core-hole memory and the "Zeeman Auger" effect

January 12, 2022
Author(s)
Eric L. Shirley, Joseph Woicik, Conan Weiland, Ahmed Rumaiz, Charles Cardot, Joshua Kas, John Rehr
Gold and platinum have the face-centered-cubic crystal structure, are considered noble metals, and differ by one in atomic number. Near-edge M4,5 x-ray absorption and resonant M4,5N6,7N6,7 Auger spectroscopy reveal "dark" edges and a photon-energy

CODATA Recommended Values of the Fundamental Physical Constants: 2018

January 10, 2022
Author(s)
Eite Tiesinga, Peter J. Mohr, David B. Newell, Barry N. Taylor
We report the 2018 self-consistent values of constants and conversion factors of physics and chemistry recommended by the Committee on Data of the International Science Council (CODATA). The recommended values can also be found at physics.nist.gov

Easy-plane spin Hall nano-oscillators as spiking neurons for neuromorphic computing

January 10, 2022
Author(s)
Danijela Markovic, Matthew Daniels, Pankaj Sethi, Andrew Kent, Mark Stiles, Julie Grollier
We show analytically using a macrospin approximation that easy-plane spin Hall nano-oscillators excited by a spin-current polarized perpendicularly to the easy-plane have phase dynamics analogous to that of Josephson junctions. This allows them to

Interfacial water asymmetry at ideal electrochemical interfaces

January 6, 2022
Author(s)
Abhishek Shandilya, Kathleen Schwarz, Ravishankar Sundararaman
Controlling electrochemical reactivity requires a detailed understanding of the charging behavior and thermodynamics of the electrochemical interface. Experiments can independently probe the overall charge response of the electrochemical double layer by

Advanced characterization of magnetization dynamics in iron oxide magnetic nanoparticle tracers

January 5, 2022
Author(s)
Thinh Bui, Adam Biacchi, Brianna Bosch Correa, Cindi L. Dennis, Weston L. Tew, Angela R. Hight Walker, Solomon I. Woods
Characterization of the magnetization dynamics of single-domain magnetic nanoparticles (MNPs) is important for magnetic particle imaging (MPI), magnetic resonance imaging (MRI), and emerging medical diagnostic/therapeutic technologies. Depending on
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