skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Independent amplitude approximations in coupled cluster valence bond theory: Incorporation of 3-electron-pair correlation and application to spin frustration in the low-lying excited states of a ferredoxin-type tetrametallic iron-sulfur cluster

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.5046318· OSTI ID:1480819
 [1]; ORCiD logo [1]
  1. Univ. of California, Berkeley, CA (United States). Department of Chemsitry; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Chemical Sciences Division

We report that coupled cluster valence bond (CCVB) is a simple electronic structure method based on a perfect pairing (PP) reference with 2-pair recouplings for strong electron correlation problems. CCVB is spin-pure, size-consistent, and can exactly (in its active space) separate any molecule into atoms for which unrestricted Hartree-Fock (UHF) at dissociation is the sum of the ground state UHF energies of the atoms. However CCVB is far from a complete description of strong correlations. Its first failure to exactly describe spin-recouplings arises at the level of 3 electron pairs, such as the recoupling of 3 triplet oxygen atoms in the dissociation of singlet ozone. Such situations are often associated with spin frustration. To address this limitation, an extension of CCVB, termed CCVB+i3, is reported here that includes an independent (i) amplitude approximation to the 3-pair recouplings. CCVB+i3 thereby has the same basic computational requirements as those of CCVB, which has previously been shown to be an efficient method. CCVB+i3 correctly separates molecules that CCVB cannot. As a by-product, an independent 2-pair amplitude approximation to CCVB, called PP+i2, is also defined. Remarkably, PP+i2 can also correctly separate systems that CCVB cannot. CCVB+i3 is validated on the symmetric dissociation of D3h ozone. CCVB+i3 is then used to explore the role of 3-pair recouplings in an [Fe4S4(SCH3)4]2- cluster that has been used to model the iron-sulfur core of [Fe4S4] ferredoxins. Using localized PP orbitals, such recouplings are demonstrated to be large in some low-lying singlet excited states of the cluster. Lastly, significant 3 pair recoupling amplitudes include the usual triangular motif associated with spin frustration and other geometric arrangements of the 3 entangled pairs across the 4 iron centers.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1480819
Alternate ID(s):
OSTI ID: 1476697
Journal Information:
Journal of Chemical Physics, Vol. 149, Issue 14; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (62)

Applications of spin-coupled valence bond theory journal July 1991
Theoretical studies of the first‐ and second‐row transition‐metal methyls and their positive ions journal August 1989
Active-space two-electron reduced-density-matrix method: Complete active-space calculations without diagonalization of the N-electron Hamiltonian journal October 2008
Coupled-Cluster Valence-Bond Singles and Doubles for Strongly Correlated Systems: Block-Tensor Based Implementation and Application to Oligoacenes journal January 2017
Cost-effective description of strong correlation: Efficient implementations of the perfect quadruples and perfect hextuples models journal October 2016
The Description of Chemical Bonding From AB Initio Calculations journal October 1978
Ab initio calculations on small hydrides including electron correlation: III. A study of the valence shell intrapair and interpair correlation energy of some first row hydrides journal January 1970
Communication: An adaptive configuration interaction approach for strongly correlated electrons with tunable accuracy journal April 2016
Tractable spin-pure methods for bond breaking: Local many-electron spin-vector sets and an approximate valence bond model journal February 2009
Gaussian basis sets for use in correlated molecular calculations. I. The atoms boron through neon and hydrogen journal January 1989
Use of approximate integrals in ab initio theory. An application in MP2 energy calculations journal June 1993
Auxiliary basis sets for density fitting–MP2 calculations: Nonrelativistic triple-ζ all-electron correlation consistent basis sets for the 3d elements Sc–Zn journal January 2008
Basis Set Exchange:  A Community Database for Computational Sciences journal March 2007
A tractable and accurate electronic structure method for static correlations: The perfect hextuples model journal July 2010
Direct Calculation of Approximate Natural Orbitals and Natural Expansion Coefficients of Atomic and Molecular Electronic Wavefunctions. II. Decoupling of the Pair Equations and Calculation of the Pair Correlation Energies for the Be and LiH Ground States journal February 1968
Correcting Systematic Errors in DFT Spin-Splitting Energetics for Transition Metal Complexes journal December 2010
Combining the Complete Active Space Self-Consistent Field Method and the Full Configuration Interaction Quantum Monte Carlo within a Super-CI Framework, with Application to Challenging Metal-Porphyrins journal February 2016
Coupled cluster valence bond theory for open-shell systems with application to very long range strong correlation in a polycarbene dimer journal July 2017
The generalized active space concept in multiconfigurational self-consistent field methods journal July 2011
A simple way to test for collinearity in spin symmetry broken wave functions: General theory and application to generalized Hartree Fock journal March 2015
The Density Matrix Renormalization Group in Quantum Chemistry journal May 2011
Density Functional Theory of Electronic Structure journal January 1996
Accurate first-principles structures and energies of diversely bonded systems from an efficient density functional journal June 2016
Self‐consistent molecular orbital methods. XXIII. A polarization‐type basis set for second‐row elements journal October 1982
Advances in molecular quantum chemistry contained in the Q-Chem 4 program package journal September 2014
Coupled Cluster Valence Bond Method: Efficient Computer Implementation and Application to Multiple Bond Dissociations and Strong Correlations in the Acenes journal April 2014
The complete active space SCF (CASSCF) method in a Newton–Raphson formulation with application to the HNO molecule journal February 1981
The perfect quadruples model for electron correlation in a valence active space journal February 2009
Size-consistent wave functions for nondynamical correlation energy: The valence active space optimized orbital coupled-cluster doubles model journal December 1998
Are atoms intrinsic to molecular electronic wavefunctions? I. The FORS model journal September 1982
Restricted active space spin-flip configuration interaction: Theory and examples for multiple spin flips with odd numbers of electrons journal October 2012
Efficient use of the correlation consistent basis sets in resolution of the identity MP2 calculations journal February 2002
Thirty years of density functional theory in computational chemistry: an overview and extensive assessment of 200 density functionals journal April 2017
A look at the density functional theory zoo with the advanced GMTKN55 database for general main group thermochemistry, kinetics and noncovalent interactions journal January 2017
A complete active space SCF method (CASSCF) using a density matrix formulated super-CI approach journal May 1980
A deterministic alternative to the full configuration interaction quantum Monte Carlo method journal July 2016
General atomic and molecular electronic structure system journal November 1993
The role of databases in support of computational chemistry calculations journal October 1996
Challenges for Density Functional Theory journal December 2011
Quantitative quantum chemistry journal August 2008
Robust and variational fitting journal January 2000
Application of the independent electron pair approach to the calculation of excitation energies, ionization potentials, and electron affinities of first row atoms journal January 1975
Post-modern valence bond theory for strongly correlated electron spins journal January 2011
ω B97M-V: A combinatorially optimized, range-separated hybrid, meta-GGA density functional with VV10 nonlocal correlation journal June 2016
A fusion of the closed-shell coupled cluster singles and doubles method and valence-bond theory for bond breaking journal September 2012
Spin states of (bio)inorganic systems: Successes and pitfalls journal July 2012
Projected Hartree–Fock theory journal April 2012
The restricted active space self-consistent-field method, implemented with a split graph unitary group approach journal July 1990
Low-energy spectrum of iron–sulfur clusters directly from many-particle quantum mechanics journal August 2014
Gaussian Basis Set for Molecular Wavefunctions Containing Third‐Row Atoms journal February 1970
Large-Scale Variational Two-Electron Reduced-Density-Matrix-Driven Complete Active Space Self-Consistent Field Methods journal April 2016
Modern valence bond theory journal January 1997
Spin-coupled valence bond theory journal January 1988
Quantum Mechanical Modeling of Catalytic Processes journal July 2011
Restricted active space spin-flip configuration interaction approach: theory, implementation and examples journal January 2009
Efficient diffuse function-augmented basis sets for anion calculations. III. The 3-21+G basis set for first-row elements, Li-F journal October 1983
Orbital optimization in the density matrix renormalization group, with applications to polyenes and β-carotene journal April 2008
Self—Consistent Molecular Orbital Methods. XII. Further Extensions of Gaussian—Type Basis Sets for Use in Molecular Orbital Studies of Organic Molecules journal March 1972
An Antifungal Polycyclic Tetramate Macrolactam, Heat-Stable Antifungal Factor (HSAF), Is a Novel Oxidative Stress Modulator in Lysobacter enzymogenes journal April 2021
Combining the Complete Active Space Self-Consistent Field Method and the Full Configuration Interaction Quantum Monte Carlo within a Super-CI Framework, with Application to Challenging Metal-Porphyrins text January 2016
Ab initio calculations on small hydrides including electron correlation: I. The BeH2 molecule in its ground state journal January 1968
Cost-effective description of strong correlation: efficient implementations of the perfect quadruples and perfect hextuples models text January 2016

Cited By (4)


Figures / Tables (7)