Verification of Anderson superexchange in MnO via magnetic pair distribution function analysis and ab initio theory
Abstract
Here, we present a temperature-dependent atomic and magnetic pair distribution function (PDF) analysis of neutron total scattering measurements of antiferromagnetic MnO, an archetypal strongly correlated transition-metal oxide. The known antiferromagnetic ground-state structure fits the low-temperature data closely with refined parameters that agree with conventional techniques, confirming the reliability of the newly developed magnetic PDF method. The measurements performed in the paramagnetic phase reveal significant short-range magnetic correlations on a ~1 nm length scale that differ substantially from the low-temperature long-range spin arrangement. Ab initio calculations using a self-interaction-corrected local spin density approximation of density functional theory predict magnetic interactions dominated by Anderson superexchange and reproduce the measured short-range magnetic correlations to a high degree of accuracy. Further calculations simulating an additional contribution from a direct exchange interaction show much worse agreement with the data. Furthermore, the Anderson superexchange model for MnO is thus verified by experimentation and confirmed by ab initio theory.
- Authors:
-
- European Synchrotron Radiation Facility (ESRF), Grenoble (France)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Columbia Univ., New York, NY (United States)
- Univ. of Warwick, Coventry (United Kingdom)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Columbia Univ., New York, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1253319
- Alternate Identifier(s):
- OSTI ID: 1252597
- Report Number(s):
- BNL-112116-2016-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: PM032; KC0202010
- Grant/Contract Number:
- SC00112704; AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 116; Journal Issue: 19; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Benjamin A. Frandsen, Brunelli, Michela, Page, Katharine, Uemura, Yasutomo J., Staunton, Julie B., and Billinge, Simon J. L. Verification of Anderson superexchange in MnO via magnetic pair distribution function analysis and ab initio theory. United States: N. p., 2016.
Web. doi:10.1103/PhysRevLett.116.197204.
Benjamin A. Frandsen, Brunelli, Michela, Page, Katharine, Uemura, Yasutomo J., Staunton, Julie B., & Billinge, Simon J. L. Verification of Anderson superexchange in MnO via magnetic pair distribution function analysis and ab initio theory. United States. https://doi.org/10.1103/PhysRevLett.116.197204
Benjamin A. Frandsen, Brunelli, Michela, Page, Katharine, Uemura, Yasutomo J., Staunton, Julie B., and Billinge, Simon J. L. Wed .
"Verification of Anderson superexchange in MnO via magnetic pair distribution function analysis and ab initio theory". United States. https://doi.org/10.1103/PhysRevLett.116.197204. https://www.osti.gov/servlets/purl/1253319.
@article{osti_1253319,
title = {Verification of Anderson superexchange in MnO via magnetic pair distribution function analysis and ab initio theory},
author = {Benjamin A. Frandsen and Brunelli, Michela and Page, Katharine and Uemura, Yasutomo J. and Staunton, Julie B. and Billinge, Simon J. L.},
abstractNote = {Here, we present a temperature-dependent atomic and magnetic pair distribution function (PDF) analysis of neutron total scattering measurements of antiferromagnetic MnO, an archetypal strongly correlated transition-metal oxide. The known antiferromagnetic ground-state structure fits the low-temperature data closely with refined parameters that agree with conventional techniques, confirming the reliability of the newly developed magnetic PDF method. The measurements performed in the paramagnetic phase reveal significant short-range magnetic correlations on a ~1 nm length scale that differ substantially from the low-temperature long-range spin arrangement. Ab initio calculations using a self-interaction-corrected local spin density approximation of density functional theory predict magnetic interactions dominated by Anderson superexchange and reproduce the measured short-range magnetic correlations to a high degree of accuracy. Further calculations simulating an additional contribution from a direct exchange interaction show much worse agreement with the data. Furthermore, the Anderson superexchange model for MnO is thus verified by experimentation and confirmed by ab initio theory.},
doi = {10.1103/PhysRevLett.116.197204},
journal = {Physical Review Letters},
number = 19,
volume = 116,
place = {United States},
year = {Wed May 11 00:00:00 EDT 2016},
month = {Wed May 11 00:00:00 EDT 2016}
}
Web of Science
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Works referencing / citing this record:
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