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Title: Accurate X-Ray Spectral Predictions: An Advanced Self-Consistent-Field Approach Inspired by Many-Body Perturbation Theory

Abstract

Constrained-occupancy delta-self-consistent-field (ΔSCF) methods and many-body perturbation theories (MBPT) are two strategies for obtaining electronic excitations from first principles. Using the two distinct approaches, we study the O 1s core excitations that have become increasingly important for characterizing transition-metal oxides and understanding strong electronic correlation. The ΔSCF approach, in its current single-particle form, systematically underestimates the pre-edge intensity for chosen oxides, despite its success in weakly correlated systems. By contrast, the Bethe-Salpeter equation within MBPT predicts much better line shapes. This motivates one to reexamine the many-electron dynamics of x-ray excitations. We find that the single-particle ΔSCF approach can be rectified by explicitly calculating many-electron transition amplitudes, producing x-ray spectra in excellent agreement with experiments. This study paves the way to accurately predict x-ray near-edge spectral fingerprints for physics and materials science beyond the Bethe-Salpether equation.

Authors:
 [1];  [2];  [1];  [1];  [2];  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1398466
Alternate Identifier(s):
OSTI ID: 1345695
Grant/Contract Number:  
AC02-05CH11231; SC0004993
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 9; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Liang, Yufeng, Vinson, John, Pemmaraju, Sri, Drisdell, Walter S., Shirley, Eric L., and Prendergast, David. Accurate X-Ray Spectral Predictions: An Advanced Self-Consistent-Field Approach Inspired by Many-Body Perturbation Theory. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.118.096402.
Liang, Yufeng, Vinson, John, Pemmaraju, Sri, Drisdell, Walter S., Shirley, Eric L., & Prendergast, David. Accurate X-Ray Spectral Predictions: An Advanced Self-Consistent-Field Approach Inspired by Many-Body Perturbation Theory. United States. https://doi.org/10.1103/PhysRevLett.118.096402
Liang, Yufeng, Vinson, John, Pemmaraju, Sri, Drisdell, Walter S., Shirley, Eric L., and Prendergast, David. 2017. "Accurate X-Ray Spectral Predictions: An Advanced Self-Consistent-Field Approach Inspired by Many-Body Perturbation Theory". United States. https://doi.org/10.1103/PhysRevLett.118.096402. https://www.osti.gov/servlets/purl/1398466.
@article{osti_1398466,
title = {Accurate X-Ray Spectral Predictions: An Advanced Self-Consistent-Field Approach Inspired by Many-Body Perturbation Theory},
author = {Liang, Yufeng and Vinson, John and Pemmaraju, Sri and Drisdell, Walter S. and Shirley, Eric L. and Prendergast, David},
abstractNote = {Constrained-occupancy delta-self-consistent-field (ΔSCF) methods and many-body perturbation theories (MBPT) are two strategies for obtaining electronic excitations from first principles. Using the two distinct approaches, we study the O 1s core excitations that have become increasingly important for characterizing transition-metal oxides and understanding strong electronic correlation. The ΔSCF approach, in its current single-particle form, systematically underestimates the pre-edge intensity for chosen oxides, despite its success in weakly correlated systems. By contrast, the Bethe-Salpeter equation within MBPT predicts much better line shapes. This motivates one to reexamine the many-electron dynamics of x-ray excitations. We find that the single-particle ΔSCF approach can be rectified by explicitly calculating many-electron transition amplitudes, producing x-ray spectra in excellent agreement with experiments. This study paves the way to accurately predict x-ray near-edge spectral fingerprints for physics and materials science beyond the Bethe-Salpether equation.},
doi = {10.1103/PhysRevLett.118.096402},
url = {https://www.osti.gov/biblio/1398466}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 9,
volume = 118,
place = {United States},
year = {Fri Mar 03 00:00:00 EST 2017},
month = {Fri Mar 03 00:00:00 EST 2017}
}

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Cited by: 52 works
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Works referencing / citing this record:

Theoretical X‐ray spectroscopy of transition metal compounds
journal, July 2019


Automated estimation of materials parameter from X-ray absorption and electron energy-loss spectra with similarity measures
journal, March 2019


Influence of conjugation length on ultrafast electronic tunneling in organic semiconductor thin films
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Direct observation of delithiation as the origin of analog memristance in Li x NbO 2
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Evidence of a second-order Peierls-driven metal-insulator transition in crystalline NbO 2
journal, July 2019