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William Parker
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QMCPACK: an open source ab initio quantum Monte Carlo package for the electronic structure of atoms, molecules and solids
J Kim, AD Baczewski, TD Beaudet, A Benali, MC Bennett, MA Berrill, ...
Journal of Physics: Condensed Matter 30 (19), 195901, 2018
2772018
Phase transformation in Si from semiconducting diamond to metallic β-Sn phase in QMC and DFT under hydrostatic and anisotropic stress
RG Hennig, A Wadehra, KP Driver, WD Parker, CJ Umrigar, JW Wilkins
Physical Review B 82 (1), 014101, 2010
922010
First-principles study of misfit strain-stabilized ferroelectric SnTiO 3
WD Parker, JM Rondinelli, SM Nakhmanson
Physical Review B 84 (24), 245126, 2011
672011
Accuracy of quantum Monte Carlo methods for point defects in solids
WD Parker, JW Wilkins, RG Hennig
physica status solidi (b) 248 (2), 267-274, 2011
472011
Giant optical enhancement of strain gradient in ferroelectric BiFeO3 thin films and its physical origin
Y Li, C Adamo, P Chen, PG Evans, SM Nakhmanson, W Parker, ...
Scientific reports 5 (1), 16650, 2015
442015
First-principles studies of lone-pair-induced distortions in epitaxial phases of perovskite SnTiO 3 and PbTiO 3
KC Pitike, WD Parker, L Louis, SM Nakhmanson
Physical Review B 91 (3), 035112, 2015
382015
Nanosecond Phase Transition Dynamics in Compressively Strained Epitaxial BiFeO3
MP Cosgriff, P Chen, SS Lee, HJ Lee, L Kuna, KC Pitike, L Louis, ...
Advanced Electronic Materials 2 (1), 1500204, 2016
112016
Anaerobic Membrane Bioreactor (AnMBR) for sustainable wastewater treatment
P Evans, A Doody, M Harclerode, P Vila, P Parameswaran, K Lim, J Bae, ...
Project ER-201434. Department of Defense Environmental Security Technology …, 2018
92018
Comparison of polynomial approximations to speed up planewave-based quantum Monte Carlo calculations
WD Parker, CJ Umrigar, D Alfè, FR Petruzielo, RG Hennig, JW Wilkins
Journal of Computational Physics 287, 77-87, 2015
62015
Chaotic scattering from hydrogen atoms in a circularly polarized laser field
E Okon, W Parker, W Chism, LE Reichl
Physical Review A 66 (5), 053406, 2002
62002
Density functional study of the structural, electronic, and vibrational properties of β-Ba 2 TiO 4
WD Parker, SM Nakhmanson
Physical Review B 88 (24), 245108, 2013
52013
Strain-induced incommensurate distortions in epitaxial Ruddlesden-Popper-type Ba 2 TiO 4
WD Parker, SM Nakhmanson
Physical Review B 88 (3), 035203, 2013
32013
Exchange-Correlation Functional Comparison of Electronic Energies in Atoms Using a Grid Basis
AD Ryan, A Gama, F Felerski, WD Parker
Journal of Applied Mathematics and Physics 10 (11), 3392-3407, 2022
2022
pysky: An Application for the Planning of Multi-Target Astronomical Observations
AE Rocha, WD Parker
Journal of Applied Mathematics and Physics 9 (11), 2765-2775, 2021
2021
Effect of Parameter Choice in Density Functional Perturbation Theory Calculations of Phonons and Related Properties
R Glusic, W Parker
APS March Meeting Abstracts 2021, H71. 206, 2021
2021
Theoretical Phase Stability of Silicon Nanomembranes Under Pressure
J Ambriz Ponce, W Parker
Bulletin of the American Physical Society 65, 2020
2020
Density Functional Perturbation Theory Parameter Convergence for Phonons
R Glusic, W Parker
Bulletin of the American Physical Society 65, 2020
2020
Density Functional Investigation of Phase Transition in Silicon Nanomembranes
J Ambriz Ponce, E Macintosh, W Parker
Bulletin of the American Physical Society 65, 2020
2020
Giant optical enhancement of strain gradient in ferroelectric thin films and its physics origin
Y Li, C Adamo, P Chen, PG Evans, SM Nakhmanson, W Parker, ...
arXiv preprint arXiv:1504.02061, 2015
2015
Diffusion Monte Carlo Study of Pt Dimer Tetramer and Cuboctahedral 13-atom Cluster.
L Shulenburger, W Parker, A Benali, NA Romero, J Greeley
Journal of Chemical Theory and Computation, 2014
2014
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Articles 1–20