Journal article
Extraction of dipolar coupling constants from low-frequency electrically detected magnetic resonance and near-zero field magnetoresistance spectra via least squares fitting to models developed from the stochastic quantum Liouville equation
Journal of applied physics, Vol.130(23), p.234401
12/21/2021
DOI: 10.1063/5.0075460
Abstract
We report low-frequency electrically detected magnetic resonance (EDMR) and near-zero field magnetoresistance (NZFMR) measurements observed through spin-dependent trap-assisted tunneling on unpassivated Si-28/(SiO2)-Si-28 metal-insulator-semiconductor (MIS) capacitors. This study both experimentally and theoretically explores the effects of the low-frequency EDMR response and the mechanisms responsible for spin-mixing, which leads to the NZFMR response in the absence of electron-nuclear hyperfine interactions. Previous reports that utilized high-frequency EDMR and NZFMR on these devices indicated that the observed trap-assisted tunneling spectra are dominated by silicon dangling bonds back bonded to silicon at the Si/SiO2 interface, P-b0 and P-b1 centers. These previous results also suggest that the rate limiting step in trap-assisted tunneling is the interface to an oxide trapping event. In this work, we extend the theory to show the explicit connection of the defects observed between the NZFMR response and the EDMR, which has not yet been demonstrated. We also extend a theoretical approach to the analysis of both the EDMR and NZFMR spectra and match the theory to experimental observations made in Si-28/(SiO2)-Si-28 MIS capacitors. The method utilizes a least squares fitting algorithm of models developed from the stochastic quantum Liouville equation. We find that we can extract a dipolar coupling constant by fitting both the NZFMR and EDMR spectra. Our experimental results and resulting fitted spectra from our quantitative model suggest the mechanism responsible for spin-mixing, which leads to the NZFMR response in the absence of electron-nuclear hyperfine interactions, is predominately magnetic dipolar interactions between P-b centers at the interface.
Details
- Title: Subtitle
- Extraction of dipolar coupling constants from low-frequency electrically detected magnetic resonance and near-zero field magnetoresistance spectra via least squares fitting to models developed from the stochastic quantum Liouville equation
- Creators
- Elias B. Frantz - Pennsylvania State UniversityNicholas J. Harmon - Conway School of Landscape DesignDavid J. Michalak - IntelEric M. Henry - Intel Corp, Intel Components Res, Hillsboro, OR 97124 USAMichael E. Flatte - University of IowaSean W. King - IntelJames S. Clarke - IntelPatrick M. Lenahan - Pennsylvania State University
- Resource Type
- Journal article
- Publication Details
- Journal of applied physics, Vol.130(23), p.234401
- Publisher
- AIP Publishing
- DOI
- 10.1063/5.0075460
- ISSN
- 0021-8979
- eISSN
- 1089-7550
- Number of pages
- 10
- Grant note
- HDTRA1-18-0012 / Defense Threat Reduction Agency (DTRA); United States Department of Defense; Defense Threat Reduction Agency Intel Global Supply Chain Internship Program
- Language
- English
- Date published
- 12/21/2021
- Academic Unit
- Electrical and Computer Engineering; Physics and Astronomy
- Record Identifier
- 9984428808202771
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